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2008 Vol. 38, No. 5
Display Method:
2008, 38(5): 1-4.
doi: 10.13204/j.gyjz200805001
Abstract:
It is introduced that the basic theory, types, structures, advantages and disadvantages, characteristics, applicable field and principles for the location of the branches and bulbs of DX pile, the structures, technical data and motion trajectory of DX extruding device.
It is introduced that the basic theory, types, structures, advantages and disadvantages, characteristics, applicable field and principles for the location of the branches and bulbs of DX pile, the structures, technical data and motion trajectory of DX extruding device.
2008, 38(5): 5-12.
doi: 10.13204/j.gyjz200805002
Abstract:
It is described that the distinguishing features of load transfer of DX piles. It is also compared that the different characteristics of load transfer among bored piles, under-reamed bored piles, mult-i under-reamed bored piles and DX piles.
It is described that the distinguishing features of load transfer of DX piles. It is also compared that the different characteristics of load transfer among bored piles, under-reamed bored piles, mult-i under-reamed bored piles and DX piles.
2008, 38(5): 13-17,27.
doi: 10.13204/j.gyjz200805003
Abstract:
Two methods for determining the ultimate bearing capacity of DX piles are put forward, i. e. the s-lgQ method and the association of the inverse slope method and the s-lgQ method.The comprehensively estimating method of ultimate bearing capacity of DX piles are also put forward.
Two methods for determining the ultimate bearing capacity of DX piles are put forward, i. e. the s-lgQ method and the association of the inverse slope method and the s-lgQ method.The comprehensively estimating method of ultimate bearing capacity of DX piles are also put forward.
2008, 38(5): 18-22.
doi: 10.13204/j.gyjz200805004
Abstract:
It is presented that a calculation formula of vertical compressional bearing capacity of DX pile; the determination of empirical values of the limiting skin-friction resistance, limiting bulb resistance and limiting poin-t resistance standard values.
It is presented that a calculation formula of vertical compressional bearing capacity of DX pile; the determination of empirical values of the limiting skin-friction resistance, limiting bulb resistance and limiting poin-t resistance standard values.
2008, 38(5): 23-27.
doi: 10.13204/j.gyjz200805005
Abstract:
The factors affecting the compressive bearing capacity of shaft of DX piles are analysed, the calculation formulas of compressive bearing capacity of shaft are discussed, and the coefficients of working conditions of DX pile are put forward.
The factors affecting the compressive bearing capacity of shaft of DX piles are analysed, the calculation formulas of compressive bearing capacity of shaft are discussed, and the coefficients of working conditions of DX pile are put forward.
2008, 38(5): 28-31.
doi: 10.13204/j.gyjz200805006
Abstract:
t is introduced that the ordinary stipulations of DX pile construction, including the construction procedures, construction matters needing attention and main points of quality inspection of DX piles by slurry-drilled holing or holing in dry condition.
t is introduced that the ordinary stipulations of DX pile construction, including the construction procedures, construction matters needing attention and main points of quality inspection of DX piles by slurry-drilled holing or holing in dry condition.
2008, 38(5): 32-38,4.
doi: 10.13204/j.gyjz200805007
Abstract:
In this paper, the different main factors affecting the vertically compressive bearing capacity of DX piles are described. The above-mentioned factors comprise the diameters of pile shafts, branches bearing and bulbs bearing, the numbers, intervals and places of branches bearing and bulbs bearing, the characteristic of bearing strata of branches bearing and bulbs bearing, the pressure value of extrusion first time, the construction technologies and qualities of piles.
In this paper, the different main factors affecting the vertically compressive bearing capacity of DX piles are described. The above-mentioned factors comprise the diameters of pile shafts, branches bearing and bulbs bearing, the numbers, intervals and places of branches bearing and bulbs bearing, the characteristic of bearing strata of branches bearing and bulbs bearing, the pressure value of extrusion first time, the construction technologies and qualities of piles.
2008, 38(5): 39-41,56.
doi: 10.13204/j.gyjz200805008
Abstract:
The study on Xi. an modern industrial architecture is still a blank in academic circle. On the basis of an extensive collection and analysis of the related data and field work of the typical Xi. an modern industrial architectures, it is given its stage of development, then summarized the characteristics of modern industrial architectures in Xi. an ) ) ) an inland city in China. It is finally probed it. s value, hoping to push forward the work on the study on modern industrial architectures, even modern architectures in Xi. an.
The study on Xi. an modern industrial architecture is still a blank in academic circle. On the basis of an extensive collection and analysis of the related data and field work of the typical Xi. an modern industrial architectures, it is given its stage of development, then summarized the characteristics of modern industrial architectures in Xi. an ) ) ) an inland city in China. It is finally probed it. s value, hoping to push forward the work on the study on modern industrial architectures, even modern architectures in Xi. an.
2008, 38(5): 42-45,78.
doi: 10.13204/j.gyjz200805009
Abstract:
Management integration theory is a basic theory of systems science; the theory has an important guiding significance for the protection of industrial heritages in Shenyang. Through expounding the relation between the theory and the protection, it is described that the purpose, basis and conditions of applying this theory to the protection of industrial heritages in Shenyang. It is put forward the corresponding protection strategy of industrial heritages in Shenyang according to the characteristics of the management integration theory: its integration being greater than the sum of parts, the scale effect, the structure effect and the component effect.
Management integration theory is a basic theory of systems science; the theory has an important guiding significance for the protection of industrial heritages in Shenyang. Through expounding the relation between the theory and the protection, it is described that the purpose, basis and conditions of applying this theory to the protection of industrial heritages in Shenyang. It is put forward the corresponding protection strategy of industrial heritages in Shenyang according to the characteristics of the management integration theory: its integration being greater than the sum of parts, the scale effect, the structure effect and the component effect.
2008, 38(5): 46-49,53.
doi: 10.13204/j.gyjz200805010
Abstract:
According to the merits and demerits of a common transfer story, the arch transfer floor is put forward, which is a new transfer story structure, and the mechanical behavior of the arch transfer floor subjected to vertical loading is analyzed. It is pointed out that the line rig idity ratio of upper chord to bottom chord and the ratio of arch height to span should be controlled rationally, which may be adopted in the engineering design.
According to the merits and demerits of a common transfer story, the arch transfer floor is put forward, which is a new transfer story structure, and the mechanical behavior of the arch transfer floor subjected to vertical loading is analyzed. It is pointed out that the line rig idity ratio of upper chord to bottom chord and the ratio of arch height to span should be controlled rationally, which may be adopted in the engineering design.
2008, 38(5): 50-53.
doi: 10.13204/j.gyjz200805011
Abstract:
Through two year. s experiment on prestressed beams under variable loads, the stiffness, deflection and crosssection strain of prestressed concrete beams are measured. According to the test results, the calculating formula of national code on the stiffness of fluxural member is verified.
Through two year. s experiment on prestressed beams under variable loads, the stiffness, deflection and crosssection strain of prestressed concrete beams are measured. According to the test results, the calculating formula of national code on the stiffness of fluxural member is verified.
2008, 38(5): 54-56.
doi: 10.13204/j.gyjz200805012
Abstract:
Through the analysis and study of non-uniformly distributed strain coefficients of reinforced concrete bending members under serviceability limit state, we build a reduced computation model is set and up a reduced computation formula of steel strain non-uniform coefficients is also deduced. The results are confirmed with the results of the empirical formula in the present standard code. This method offers a new theoretic calculation method for the empirical formula in the present standard code.
Through the analysis and study of non-uniformly distributed strain coefficients of reinforced concrete bending members under serviceability limit state, we build a reduced computation model is set and up a reduced computation formula of steel strain non-uniform coefficients is also deduced. The results are confirmed with the results of the empirical formula in the present standard code. This method offers a new theoretic calculation method for the empirical formula in the present standard code.
2008, 38(5): 57-59,74.
doi: 10.13204/j.gyjz200805013
Abstract:
A kind of anode-ladder sensor for new concrete structure is introduced. Through measuring the voltage of the anodes and the macrocell currents between the anodes and cathodes in sensor, it is monitored the corrosion risk for the reinforcement in concrete exposed to environments that contain chloride. Tests of the sensor in laboratory show that, this anode-ladder sensor can indicate the depth of the critical chloride content in concrete perfectly, and can judge the corrosion risk for reinforcement before cracks occur.
A kind of anode-ladder sensor for new concrete structure is introduced. Through measuring the voltage of the anodes and the macrocell currents between the anodes and cathodes in sensor, it is monitored the corrosion risk for the reinforcement in concrete exposed to environments that contain chloride. Tests of the sensor in laboratory show that, this anode-ladder sensor can indicate the depth of the critical chloride content in concrete perfectly, and can judge the corrosion risk for reinforcement before cracks occur.
2008, 38(5): 60-62.
doi: 10.13204/j.gyjz200805014
Abstract:
In order to comprehensively utilize the industrial waste residue, a concrete was made of a blas-t furnace slag taken as coarse and fine aggregate. After 24 h oven drying at 110 e, the concrete was treated for 3 h under constant temperatures of 300, 500 and 700 e respectively. The study was conducted to measure the impacts of sand percentage (SP), maximum particle size of coarse aggregate, water-cement ratio and cement quantity, on the thermo-stability of slagbased aggregate concrete. The result indicates: at 300 e the relative compression strength(RCS) is above 100%, at 500 e, the RCS is between 57%~ 86%, at 700 e, the RCS is between 22% ~ 58%. More SP value, smaller max imum particle size of coarse aggregate, lower water-cement ratio and the less cement quantity are beneficial to enhance the thermostability of the concrete; with slag-based aggregate, a concrete can be made with thermo resistance at 500 e.
In order to comprehensively utilize the industrial waste residue, a concrete was made of a blas-t furnace slag taken as coarse and fine aggregate. After 24 h oven drying at 110 e, the concrete was treated for 3 h under constant temperatures of 300, 500 and 700 e respectively. The study was conducted to measure the impacts of sand percentage (SP), maximum particle size of coarse aggregate, water-cement ratio and cement quantity, on the thermo-stability of slagbased aggregate concrete. The result indicates: at 300 e the relative compression strength(RCS) is above 100%, at 500 e, the RCS is between 57%~ 86%, at 700 e, the RCS is between 22% ~ 58%. More SP value, smaller max imum particle size of coarse aggregate, lower water-cement ratio and the less cement quantity are beneficial to enhance the thermostability of the concrete; with slag-based aggregate, a concrete can be made with thermo resistance at 500 e.
2008, 38(5): 63-65,82.
doi: 10.13204/j.gyjz200805015
Abstract:
The reason of cracking and the durability problem in 30-year-old Pier of a sea crossing bridge in coastal areas of the Pearl River Delta was studied by means of petrographic analysis, X-ray diffraction analysis, chemical analysis, scanning electron microscopyPenergy dispersive analysis and other techniques. The results showed that there were active fine aggregates in the concrete, and alkal-i silica reaction had occurred. the concrete had been eroded by magnesium salt in sea water and the sediments on the surface of the crude cracks contained a lot of magnesium hydroxide. The cracking in the concrete was caused by the compound damage of alkal-i aggregate reaction and magnesium salt erosion. This is the first report in our country that the compound damage to the concrete in marine environment was caused by the alkal-i aggregate reaction of fine aggregate and erosion of the magnesium salt. It was demanded strongly that the alkaline activity of aggregates be detected and the compound damage of the marine environment be generally considered in the ocean concrete projects. The influence of fine aggregates having alkaline activity on the durability of concrete should be taken seriously.
The reason of cracking and the durability problem in 30-year-old Pier of a sea crossing bridge in coastal areas of the Pearl River Delta was studied by means of petrographic analysis, X-ray diffraction analysis, chemical analysis, scanning electron microscopyPenergy dispersive analysis and other techniques. The results showed that there were active fine aggregates in the concrete, and alkal-i silica reaction had occurred. the concrete had been eroded by magnesium salt in sea water and the sediments on the surface of the crude cracks contained a lot of magnesium hydroxide. The cracking in the concrete was caused by the compound damage of alkal-i aggregate reaction and magnesium salt erosion. This is the first report in our country that the compound damage to the concrete in marine environment was caused by the alkal-i aggregate reaction of fine aggregate and erosion of the magnesium salt. It was demanded strongly that the alkaline activity of aggregates be detected and the compound damage of the marine environment be generally considered in the ocean concrete projects. The influence of fine aggregates having alkaline activity on the durability of concrete should be taken seriously.
2008, 38(5): 66-70.
doi: 10.13204/j.gyjz200805016
Abstract:
Due to deterioration of bond strength caused by corrosion, cooperative working capacity between steel bar and concrete is degrading, which makes steel strain lag behind concrete tensile strain. When the member corroded heavily, bond stress between steel bar and concrete is almost lost, and concrete in the compression zone may be failure before tensile steel bar arrives its yielding strain, which may make the member form a surplus reinforcement beam due to bond failure test. Simulation and finite element analysis on simulated corroded unbonded R. C. beams are made to investigate factors affecting the level of steel stress and its affecting rules in the limit states without bond. The relation between steel stress and reinforcement index of unbonded R. C. beams is established, which can be used to evaluate the bearing capacity of heavily corroded beams, and which can also be helpful to study the degrading mechanism and calculating method on bearing capacity for ordinary corroded R. C. beams.
Due to deterioration of bond strength caused by corrosion, cooperative working capacity between steel bar and concrete is degrading, which makes steel strain lag behind concrete tensile strain. When the member corroded heavily, bond stress between steel bar and concrete is almost lost, and concrete in the compression zone may be failure before tensile steel bar arrives its yielding strain, which may make the member form a surplus reinforcement beam due to bond failure test. Simulation and finite element analysis on simulated corroded unbonded R. C. beams are made to investigate factors affecting the level of steel stress and its affecting rules in the limit states without bond. The relation between steel stress and reinforcement index of unbonded R. C. beams is established, which can be used to evaluate the bearing capacity of heavily corroded beams, and which can also be helpful to study the degrading mechanism and calculating method on bearing capacity for ordinary corroded R. C. beams.
2008, 38(5): 71-74.
doi: 10.13204/j.gyjz200805017
Abstract:
There have not been any national standards for the design of high-level bracing formwork; and specially there have been even no applied codes for inclined, curved and linear structures. Combined with project examples, it is explored the design of the high-level bracing formwork for a saddle separated beam; and some suggestions on design of high-level bracing formwork for similar structures are also proposed.
There have not been any national standards for the design of high-level bracing formwork; and specially there have been even no applied codes for inclined, curved and linear structures. Combined with project examples, it is explored the design of the high-level bracing formwork for a saddle separated beam; and some suggestions on design of high-level bracing formwork for similar structures are also proposed.
2008, 38(5): 75-78.
doi: 10.13204/j.gyjz200805018
Abstract:
Fiber Reinforced Polymer (FRP) is a new style material for rehabilitation; it has been applied widely and widely in civil engineering for its excellent performance. This dissertation carried out an experiment research on the shear capability of brick walls with pilaster reinforced by GFRP sheet. The shear capacity theory and the formula of the shear calculation for design of brick wall reinforced by FRP are given.
Fiber Reinforced Polymer (FRP) is a new style material for rehabilitation; it has been applied widely and widely in civil engineering for its excellent performance. This dissertation carried out an experiment research on the shear capability of brick walls with pilaster reinforced by GFRP sheet. The shear capacity theory and the formula of the shear calculation for design of brick wall reinforced by FRP are given.
2008, 38(5): 79-72.
doi: 10.13204/j.gyjz200805019
Abstract:
Through the use of superhigh suspension scaffold for the project of a huge display screen on exterior wall, it is expounded respectively how to overcome all the unfavorable factors, such as superhigh condition, unloading, stability, wind load and limited time of construction; as well as how to carry out process control during working out of the scaffold scheme. Which can provide experience for similar projects.
Through the use of superhigh suspension scaffold for the project of a huge display screen on exterior wall, it is expounded respectively how to overcome all the unfavorable factors, such as superhigh condition, unloading, stability, wind load and limited time of construction; as well as how to carry out process control during working out of the scaffold scheme. Which can provide experience for similar projects.
2008, 38(5): 83-87,70.
doi: 10.13204/j.gyjz200805020
Abstract:
Since its low lateral stiffness, the inter-storey drifts of an un-braced stee-l frame building usually become key factors in structural design. Adding bracing to the structure is an effective measure which can improve the overall lateral stiffness and decrease the stee-l consumption. The mult-i storey and high-rise braced stee-l frames are taken as an object, through calculating the top displacements of the stee-l frames braced by different types and layouts of bracing, it studied the influence of bracing kinds on the lateral stiffness of the mult-i storey and high-rise braced stee-l frames. The results shows that, for different kinds of bracing, the lateral stiffness of a steel frame with bracings on middle spans is higher than that on side spans or other spans; for the same layouts of bracing, either centrically braced frame, or eccentrically braced frame, in the facets of lateral stiffness and economy, herringbone braced frame is better than single sway rod braced frame.
Since its low lateral stiffness, the inter-storey drifts of an un-braced stee-l frame building usually become key factors in structural design. Adding bracing to the structure is an effective measure which can improve the overall lateral stiffness and decrease the stee-l consumption. The mult-i storey and high-rise braced stee-l frames are taken as an object, through calculating the top displacements of the stee-l frames braced by different types and layouts of bracing, it studied the influence of bracing kinds on the lateral stiffness of the mult-i storey and high-rise braced stee-l frames. The results shows that, for different kinds of bracing, the lateral stiffness of a steel frame with bracings on middle spans is higher than that on side spans or other spans; for the same layouts of bracing, either centrically braced frame, or eccentrically braced frame, in the facets of lateral stiffness and economy, herringbone braced frame is better than single sway rod braced frame.
2008, 38(5): 88-92.
doi: 10.13204/j.gyjz200805021
Abstract:
PSRCB is a new type prestressed composite beam which uses prestressing technology in SRCB. The H-section steel inside increases its flexural strength and prestressing technique improves its working performance. Eight PSRC beams and six SRC beams have been done and the development and distribution of cracks have been observed carefully. On the basis of the experiment, criterion of crack control and computation of maximum crack width of PSRC beam, and crack closing are discussed. Research indicates that PSRC beam has a better serviceable performance by contrast to SRC beam: better resistance to crack; smaller strain of tensile rebar and crack width; better crack closing performance.
PSRCB is a new type prestressed composite beam which uses prestressing technology in SRCB. The H-section steel inside increases its flexural strength and prestressing technique improves its working performance. Eight PSRC beams and six SRC beams have been done and the development and distribution of cracks have been observed carefully. On the basis of the experiment, criterion of crack control and computation of maximum crack width of PSRC beam, and crack closing are discussed. Research indicates that PSRC beam has a better serviceable performance by contrast to SRC beam: better resistance to crack; smaller strain of tensile rebar and crack width; better crack closing performance.
2008, 38(5): 93-95,108.
doi: 10.13204/j.gyjz200805022
Abstract:
Based on the former experimental research on bond-slip performance, the constitutive relation of bond-slip on steel and concrete interface in SRC structures has been established. Through analysis of the former experimental researches on bond-slip performance, constitutive relation in different anchor-hold place of push and pull member on steel and concrete interface in SRC structures has been set up according to the conditions of balance and boundary, which lays down an academic foundation for constitutive relation of other SRC members and provides a reference for analyzing the non-linear performance of SRC members using ANSYS.
Based on the former experimental research on bond-slip performance, the constitutive relation of bond-slip on steel and concrete interface in SRC structures has been established. Through analysis of the former experimental researches on bond-slip performance, constitutive relation in different anchor-hold place of push and pull member on steel and concrete interface in SRC structures has been set up according to the conditions of balance and boundary, which lays down an academic foundation for constitutive relation of other SRC members and provides a reference for analyzing the non-linear performance of SRC members using ANSYS.
2008, 38(5): 96-99,121.
doi: 10.13204/j.gyjz200805023
Abstract:
The bond between steel tube and concrete is an important problem of studying concrete filled square steel tube column. Three forms of bond state were designed for dividing the bond performance between steel tube and concrete. The influence of bond performance on compressive bearing capacity of the concrete-filled square steel tube column is analyzed and the experimental results are compared with the calculation values in the design regulations of concrete-filled steel tubes. From the results, it is indicated that the influence of bond is not notable for the ultimate bearing capacity of concrete-filled steel tube column and the results provided a reference for the design theory and the design method.
The bond between steel tube and concrete is an important problem of studying concrete filled square steel tube column. Three forms of bond state were designed for dividing the bond performance between steel tube and concrete. The influence of bond performance on compressive bearing capacity of the concrete-filled square steel tube column is analyzed and the experimental results are compared with the calculation values in the design regulations of concrete-filled steel tubes. From the results, it is indicated that the influence of bond is not notable for the ultimate bearing capacity of concrete-filled steel tube column and the results provided a reference for the design theory and the design method.
2008, 38(5): 100-103.
doi: 10.13204/j.gyjz200805024
Abstract:
Stay pre-tension truss-string structure is introduced into the steel roof of Zhengzhou International Conference and Exhibition Center. The introduction of pre-tension is turned into one of primary factors which can affect structural stability performances. Based on this, a rectangular steel roof unit as an example is computed with the help of ANSYS soft. The calculative model subjected to deadweight and pre-tension is attempted to simulate structural initial state by choosing eighteen numerical values, ranging from 0 kN to 1 500 kN of pre-tension suspending cables in this system. The relations between pretension and stability safety coefficients and buckling modes are investigated. The results indicate that changes of pre-tension values can seriously affect stablility performances, in particular, rules of variation of stability safety coefficients and buckling modes can not be followed any longer in the design process. It is suggested that some factors can be taken into consideration when effects of pre-tension on stablity are explored. The work of this paper provides a design basis for the pre-tension value of stayed truss-string structures at initial state.
Stay pre-tension truss-string structure is introduced into the steel roof of Zhengzhou International Conference and Exhibition Center. The introduction of pre-tension is turned into one of primary factors which can affect structural stability performances. Based on this, a rectangular steel roof unit as an example is computed with the help of ANSYS soft. The calculative model subjected to deadweight and pre-tension is attempted to simulate structural initial state by choosing eighteen numerical values, ranging from 0 kN to 1 500 kN of pre-tension suspending cables in this system. The relations between pretension and stability safety coefficients and buckling modes are investigated. The results indicate that changes of pre-tension values can seriously affect stablility performances, in particular, rules of variation of stability safety coefficients and buckling modes can not be followed any longer in the design process. It is suggested that some factors can be taken into consideration when effects of pre-tension on stablity are explored. The work of this paper provides a design basis for the pre-tension value of stayed truss-string structures at initial state.
2008, 38(5): 104-108.
doi: 10.13204/j.gyjz200805025
Abstract:
Singer-layer plane cable net structure has been widely used in supporting structure of poin-t supported glass curtain wall. Based on tangent stiffness characteristic of curtain wall cable and the finite element analysis, it is discussed that the effects of the factors including section area, pre-stressed, difference in temperature and deflection control on the performance of singer-layer plane cable net structure.
Singer-layer plane cable net structure has been widely used in supporting structure of poin-t supported glass curtain wall. Based on tangent stiffness characteristic of curtain wall cable and the finite element analysis, it is discussed that the effects of the factors including section area, pre-stressed, difference in temperature and deflection control on the performance of singer-layer plane cable net structure.
2008, 38(5): 109-112.
doi: 10.13204/j.gyjz200805026
Abstract:
Pre-heater tower is an important structure of the new-style dry process cement production line. The pre-heater tower structure is often designed according to related codes for civil high-rise buildings. Due to special load condition, technical requirements and equipment layout, the tower frame structure has restricted structural layout and different structural performance. In this paper, a 5000TPD double series cement kiln was taken as a case study and the structure design of its braced steel frame pre-heater tower was optimized. Based on scheme comparison and the technical requirements, the optimum design scheme was determined to be re-arrangement of columns to reduce the beam span and replacing H-shape steel columns by rectangular hollow section columns or concrete-filled ones. About 25% of the total amount of steel was saved by the optimum design. In addition, the structural characteristics of the steel frame pre-heater tower were studied.
Pre-heater tower is an important structure of the new-style dry process cement production line. The pre-heater tower structure is often designed according to related codes for civil high-rise buildings. Due to special load condition, technical requirements and equipment layout, the tower frame structure has restricted structural layout and different structural performance. In this paper, a 5000TPD double series cement kiln was taken as a case study and the structure design of its braced steel frame pre-heater tower was optimized. Based on scheme comparison and the technical requirements, the optimum design scheme was determined to be re-arrangement of columns to reduce the beam span and replacing H-shape steel columns by rectangular hollow section columns or concrete-filled ones. About 25% of the total amount of steel was saved by the optimum design. In addition, the structural characteristics of the steel frame pre-heater tower were studied.
2008, 38(5): 113-114,31.
doi: 10.13204/j.gyjz200805027
Abstract:
In order to expand commercial utilization area, a floor with the area of 2 060 m2 is pos-t built in the ground floor which is 61 2 m high. The design thought is presented, that is: pos-t building corbel from the reinforced concrete column, making the corbel supporting post-built double beams, and making the double beams as main beam and supporting cross secondary beam and floor. The design process and the relative joint constructions of pos-t built corbel and pos-t built double beams are introduced, which can be served as reference for the the design of pos-t built floor of similar projects.
In order to expand commercial utilization area, a floor with the area of 2 060 m2 is pos-t built in the ground floor which is 61 2 m high. The design thought is presented, that is: pos-t building corbel from the reinforced concrete column, making the corbel supporting post-built double beams, and making the double beams as main beam and supporting cross secondary beam and floor. The design process and the relative joint constructions of pos-t built corbel and pos-t built double beams are introduced, which can be served as reference for the the design of pos-t built floor of similar projects.
2008, 38(5): 115-118.
doi: 10.13204/j.gyjz200805028
Abstract:
when soil nailing technology is applied in weak soil, the displacement of slope is increased and security of slope is brought down. The composite soil nailing technology (soil nailing and micro-pile) is adopted for practical design of controlling buildings and slope displacement, as well as for measures of construction in saturated silty soil. The effect of composite soil nailing is compared with that of general soil nailing by actual trail and observation. Project practice proves that displacement of excavation can be controlled effectively by composite soil nailing(soil nailing and micro-pile).
when soil nailing technology is applied in weak soil, the displacement of slope is increased and security of slope is brought down. The composite soil nailing technology (soil nailing and micro-pile) is adopted for practical design of controlling buildings and slope displacement, as well as for measures of construction in saturated silty soil. The effect of composite soil nailing is compared with that of general soil nailing by actual trail and observation. Project practice proves that displacement of excavation can be controlled effectively by composite soil nailing(soil nailing and micro-pile).
2008, 38(5): 119-121.
doi: 10.13204/j.gyjz200805029
Abstract:
It is presented the concept of comprehensive prestressing degree, and based on this also, presented the principle of direct calculation formula. Which can conquer the difficulty of repeated computation by the traditional prestressing degree, and a quickly computed method is provided.
It is presented the concept of comprehensive prestressing degree, and based on this also, presented the principle of direct calculation formula. Which can conquer the difficulty of repeated computation by the traditional prestressing degree, and a quickly computed method is provided.
2008, 38(5): 122-125.
doi: 10.13204/j.gyjz200805030
Abstract:
It is expounded in detail the design, which is for the project about students. apartment and refectory buildings in Pujiang College of Nanjing Polytechnic University, by analysing methodology with unitary spatial sequence. It is trying to investigate the key-issue and design method on living district for upland campus, and to introduce these factors in design process: continuing the campus landscape with macro-spatial sequence; respecting the traffic system with landform; focusing on the external space in ecology and to create a scholastical living district for students with characteristic of community culture.
It is expounded in detail the design, which is for the project about students. apartment and refectory buildings in Pujiang College of Nanjing Polytechnic University, by analysing methodology with unitary spatial sequence. It is trying to investigate the key-issue and design method on living district for upland campus, and to introduce these factors in design process: continuing the campus landscape with macro-spatial sequence; respecting the traffic system with landform; focusing on the external space in ecology and to create a scholastical living district for students with characteristic of community culture.
2008, 38(5): 126-129,125.
doi: 10.13204/j.gyjz200805031
Abstract:
It is introduced that the famous building of Jiageng style in the history of Xiamen University. Through citing the representative buildings in the construction of campus in three different periods, analyzed the main features and the intension of culture of architecture of Jiageng style and it is proposed the enlightenment of carrying on Jiageng style on the creation of modern building.
It is introduced that the famous building of Jiageng style in the history of Xiamen University. Through citing the representative buildings in the construction of campus in three different periods, analyzed the main features and the intension of culture of architecture of Jiageng style and it is proposed the enlightenment of carrying on Jiageng style on the creation of modern building.
