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2005 Vol. 35, No. 4
Display Method:
2005, 35(4): 1-5,9.
doi: 10.13204/j.gyjz200504001
Abstract:
The significance and development in China and other countries of remodeling of adding storeys around existing?building are introduced briefly.Structure types, technical problems of design and construction applied to adding storeys?around existing building and related engineering practices accomplished by authors are presented.Some recommendations on?remodeling technique of adding storeys around existing building are proposed.
The significance and development in China and other countries of remodeling of adding storeys around existing?building are introduced briefly.Structure types, technical problems of design and construction applied to adding storeys?around existing building and related engineering practices accomplished by authors are presented.Some recommendations on?remodeling technique of adding storeys around existing building are proposed.
2005, 35(4): 6-9.
doi: 10.13204/j.gyjz200504002
Abstract:
Design thought and method of underpinning beam, column, foundation and relative joint construction in?remodeling office building for Committee of Family Planning in Harbin are introduced.Some problems need to be regarded in?remodeling construction are presented.It can be served as reference for structure remodeling of the similar project.
Design thought and method of underpinning beam, column, foundation and relative joint construction in?remodeling office building for Committee of Family Planning in Harbin are introduced.Some problems need to be regarded in?remodeling construction are presented.It can be served as reference for structure remodeling of the similar project.
2005, 35(4): 10-14.
doi: 10.13204/j.gyjz200504003
Abstract:
The structure of floors and roof of Harbin Zhongyang Tower is concrete beams and plates prestressed with?unbonded tendons.Compound type houses are on 21st floor and 22nd floor originally.Building owner requires that the?compound type houses be adjusted to 22nd floor and 23rd floor.To complete the task of adjusting house, remodeling of?sealing in local area on top of 21st floor and remodeling of opening in partly floor on top of 22nd floor need to be done.It is?given that the method of sealing remodeling of local floor.It is also presented that design and construction method of post-building beam under plate, design and construction ways of reinforcing beams interrelated posted- building beam and opening?slab, temporary anchor and permanent anchor of prestressing tendons in opening, and reinforcing thought and method of?negative moment region of the plate neighboring holes.It may be served as reference for remodeling design of sealing and?opening of other floor prestressed with unbonded tendons.
The structure of floors and roof of Harbin Zhongyang Tower is concrete beams and plates prestressed with?unbonded tendons.Compound type houses are on 21st floor and 22nd floor originally.Building owner requires that the?compound type houses be adjusted to 22nd floor and 23rd floor.To complete the task of adjusting house, remodeling of?sealing in local area on top of 21st floor and remodeling of opening in partly floor on top of 22nd floor need to be done.It is?given that the method of sealing remodeling of local floor.It is also presented that design and construction method of post-building beam under plate, design and construction ways of reinforcing beams interrelated posted- building beam and opening?slab, temporary anchor and permanent anchor of prestressing tendons in opening, and reinforcing thought and method of?negative moment region of the plate neighboring holes.It may be served as reference for remodeling design of sealing and?opening of other floor prestressed with unbonded tendons.
2005, 35(4): 15-17.
doi: 10.13204/j.gyjz200504004
Abstract:
In Harbin No.6 Pharmaceutical Factory, the thickness of an external transverse brick wall of a workshop building?needs to be changed from 490mm to 620mm due to functional requirement.In order to be harmonious with the adj a?cent?office?buildings ornament, dry- hanging- stone curtain wall must be put up outside the external wall.The prestressed frame with?cantilever should be checked and strengthened, for the additional loads caused by thickened wall and curtain wall are not?considered in the original design.Calculation shows that all columns and beams except cantilever beams still meet the relative?design standards in the condition of the increased loads, so only the cantilever beams need strengthening.It is proposed that?the idea and method to increase resistance, reduce crack and deflection of the cantilever structure by setting up a post-constructed concrete wall between the cantilever beam of the foundation and that of 1st floor of the frame to form a deep beam?with a column on one side.It can be served as reference for design of similar strengthening and remodeling project.
In Harbin No.6 Pharmaceutical Factory, the thickness of an external transverse brick wall of a workshop building?needs to be changed from 490mm to 620mm due to functional requirement.In order to be harmonious with the adj a?cent?office?buildings ornament, dry- hanging- stone curtain wall must be put up outside the external wall.The prestressed frame with?cantilever should be checked and strengthened, for the additional loads caused by thickened wall and curtain wall are not?considered in the original design.Calculation shows that all columns and beams except cantilever beams still meet the relative?design standards in the condition of the increased loads, so only the cantilever beams need strengthening.It is proposed that?the idea and method to increase resistance, reduce crack and deflection of the cantilever structure by setting up a post-constructed concrete wall between the cantilever beam of the foundation and that of 1st floor of the frame to form a deep beam?with a column on one side.It can be served as reference for design of similar strengthening and remodeling project.
2005, 35(4): 18-20.
doi: 10.13204/j.gyjz200504005
Abstract:
Xinji Emporium in Harbin is a two- storey public building with a one- storey basement.The plan view of two?over?ground floors is in a concave shape, and the size of the concave area is 81 4m @ 151 0m.The owner of the building?requires that two storeys be built on the basement in this area.All the building in east, south and west directions to this area?is two- storey frame structure with a one- storey basement.Considering there is a column in each corner, two remodeling?schemes, / suspended structure method0 and / supported structure method0 are proposed.The design ideas, detail of joint and?problems worthy of note during construction are introduced respectively.It can be served as reference for the design of similar?project.
Xinji Emporium in Harbin is a two- storey public building with a one- storey basement.The plan view of two?over?ground floors is in a concave shape, and the size of the concave area is 81 4m @ 151 0m.The owner of the building?requires that two storeys be built on the basement in this area.All the building in east, south and west directions to this area?is two- storey frame structure with a one- storey basement.Considering there is a column in each corner, two remodeling?schemes, / suspended structure method0 and / supported structure method0 are proposed.The design ideas, detail of joint and?problems worthy of note during construction are introduced respectively.It can be served as reference for the design of similar?project.
2005, 35(4): 21-23.
doi: 10.13204/j.gyjz200504006
Abstract:
It's a passive method to reinforce RC beam with glued steel plate and enlarging cross section while the post-stressed method is an active one.This paper introduced a reconstruction project of a long span RC beam with demolishing?column, which applied the advantages of the above two types.The beam- column joint is designed as a hinged one to reduce?the effect on bending bearing capacity of columns, and the transfer of external prestress is also set properly, which may be?served as reference for the design of similar reconstruction projects .
It's a passive method to reinforce RC beam with glued steel plate and enlarging cross section while the post-stressed method is an active one.This paper introduced a reconstruction project of a long span RC beam with demolishing?column, which applied the advantages of the above two types.The beam- column joint is designed as a hinged one to reduce?the effect on bending bearing capacity of columns, and the transfer of external prestress is also set properly, which may be?served as reference for the design of similar reconstruction projects .
2005, 35(4): 24-25,31.
doi: 10.13204/j.gyjz200504007
Abstract:
An new type of prestress underpinning technology is presented.By means of screwing high strength bolts,underpinning beams are forced to bend to get prestress up?word, on the other hand, bearing columns are unloaded to zero?stress condition and sawed off.Compared with current underpinning technologies, the new technology features direct and?efficient prestressing, simple construction and without damage to existing structures etc.An application of the technology to a?practical project is introduced in detail.
An new type of prestress underpinning technology is presented.By means of screwing high strength bolts,underpinning beams are forced to bend to get prestress up?word, on the other hand, bearing columns are unloaded to zero?stress condition and sawed off.Compared with current underpinning technologies, the new technology features direct and?efficient prestressing, simple construction and without damage to existing structures etc.An application of the technology to a?practical project is introduced in detail.
2005, 35(4): 26-27,14.
doi: 10.13204/j.gyjz200504008
Abstract:
The problems of reforming a mill building with reinforeced concrete bent frame can be solved effectively by a?scheme of supporting beam and removing column, using adhesion supporting steel pole bracket as well as artificial bored?pile etc according to the characteristics of the project.By which the contradiction between production and construction is also?solved.
The problems of reforming a mill building with reinforeced concrete bent frame can be solved effectively by a?scheme of supporting beam and removing column, using adhesion supporting steel pole bracket as well as artificial bored?pile etc according to the characteristics of the project.By which the contradiction between production and construction is also?solved.
2005, 35(4): 28-31.
doi: 10.13204/j.gyjz200504009
Abstract:
Based on the concept of sustainable development, this article introduces the technological characters of the?ecological building abroad and indicates the confined understanding domestically.Also this paper gives the feasible means to?design such buildings in present national conditions and illuminated it by taking some actual domestic projects as examples.
Based on the concept of sustainable development, this article introduces the technological characters of the?ecological building abroad and indicates the confined understanding domestically.Also this paper gives the feasible means to?design such buildings in present national conditions and illuminated it by taking some actual domestic projects as examples.
2005, 35(4): 32-34,54.
doi: 10.13204/j.gyjz200504010
Abstract:
The protection and reuse of the industrial heritage along the Suzhou C reek have been the focus again recently.From the point of protection and the organic renewal theory of a city, this article mainly probes into the future of the?industrial heritage along the Suzhou River, and analyzes the influence of urban planning methods on the organic renewal of?heritage.
The protection and reuse of the industrial heritage along the Suzhou C reek have been the focus again recently.From the point of protection and the organic renewal theory of a city, this article mainly probes into the future of the?industrial heritage along the Suzhou River, and analyzes the influence of urban planning methods on the organic renewal of?heritage.
2005, 35(4): 35-37,17.
doi: 10.13204/j.gyjz200504011
Abstract:
The state of section of frame beam strengthened with external prestress tendon is analyzed and pointed out that?the effect will be reduced because of the lateral restriction.With the theory of D-value, to consider the structure as anelastomer, computing method of the press force on beams section is addressed.Finally, the carrying capacity of frame beam?strengthened with prestress tendon is further analyzed, and relevant formula is deduced.
The state of section of frame beam strengthened with external prestress tendon is analyzed and pointed out that?the effect will be reduced because of the lateral restriction.With the theory of D-value, to consider the structure as anelastomer, computing method of the press force on beams section is addressed.Finally, the carrying capacity of frame beam?strengthened with prestress tendon is further analyzed, and relevant formula is deduced.
2005, 35(4): 38-42.
doi: 10.13204/j.gyjz200504012
Abstract:
The behaviours of the unbonded prestressed concrete simply-supported slab are investigated under fire based on?the premise that the ISO time- temperature curve would achieve.From the test result, the general regularities of deformation?and the change of prestressed force are presented.Two important factors, prestressing level and thickness of cover, are?examined.The test results provide a basis for further research in the future.
The behaviours of the unbonded prestressed concrete simply-supported slab are investigated under fire based on?the premise that the ISO time- temperature curve would achieve.From the test result, the general regularities of deformation?and the change of prestressed force are presented.Two important factors, prestressing level and thickness of cover, are?examined.The test results provide a basis for further research in the future.
2005, 35(4): 43-47.
doi: 10.13204/j.gyjz200504013
Abstract:
The tests of three specimens of frame joint which are strengthened by enlarging column section and one?comparative specimen under low- cycle reversed load are conducted.It is analysed that the specimens in phenomenon, crack?strength, the load- bearing capacity , stiffness, ductility and so on.The shearing capacity of adding core concrete is?unfavorable when the original column axial pressure is big.The adding core with stirrups has a higher restraint to the original?core than the one without stirrups.The increase in stiffness and energy dissipation is bigger and in ductility is smaller.The?formulas of computing the cracking load of the original core and bearing capacity of the strengthening core are put forward.
The tests of three specimens of frame joint which are strengthened by enlarging column section and one?comparative specimen under low- cycle reversed load are conducted.It is analysed that the specimens in phenomenon, crack?strength, the load- bearing capacity , stiffness, ductility and so on.The shearing capacity of adding core concrete is?unfavorable when the original column axial pressure is big.The adding core with stirrups has a higher restraint to the original?core than the one without stirrups.The increase in stiffness and energy dissipation is bigger and in ductility is smaller.The?formulas of computing the cracking load of the original core and bearing capacity of the strengthening core are put forward.
2005, 35(4): 48-49,78.
doi: 10.13204/j.gyjz200504014
Abstract:
Being used for many years, the existing concrete continuous slab differs from functional design in performance?and load- appearance.This paper presents the series analytic model to calculate structural failure probability.It is that the?whole structural system should fail only if one of the structural members fails.The failure probability of the continuous slab?is the sum of the product of load- appearance probability and the failure probability under the action of the corresponding?load.Therefore, we can assess the safety of the structure and provide a theoretical basis for maintenance of existing?industrial mill building .
Being used for many years, the existing concrete continuous slab differs from functional design in performance?and load- appearance.This paper presents the series analytic model to calculate structural failure probability.It is that the?whole structural system should fail only if one of the structural members fails.The failure probability of the continuous slab?is the sum of the product of load- appearance probability and the failure probability under the action of the corresponding?load.Therefore, we can assess the safety of the structure and provide a theoretical basis for maintenance of existing?industrial mill building .
2005, 35(4): 50-54.
doi: 10.13204/j.gyjz200504015
Abstract:
In geopolymer reinforced soil structure, the behavior between the soil and geopolymer is very important to inner?stabilization of reinforced soil structure, so the index between the soil and geopolymer is a crucial index .In this paper,systematic direct- shear tests in large direct- shear apparatus are carried out for the clay reinforced by geofabric under different?normal stresses, shear rate and water content.Based on the test result, stress-strain relationship is studied.Some useful?conclusions and opinions which can be used to make research and design are also presented.
In geopolymer reinforced soil structure, the behavior between the soil and geopolymer is very important to inner?stabilization of reinforced soil structure, so the index between the soil and geopolymer is a crucial index .In this paper,systematic direct- shear tests in large direct- shear apparatus are carried out for the clay reinforced by geofabric under different?normal stresses, shear rate and water content.Based on the test result, stress-strain relationship is studied.Some useful?conclusions and opinions which can be used to make research and design are also presented.
2005, 35(4): 55-59.
doi: 10.13204/j.gyjz200504016
Abstract:
Based on chaos theory, this paper determines the values of input neural network by menas of the arithmetic that?combining the average displacement with auto?correlation function.The prediction results are induced by the feedback?network and the 'jag points'?are reduced by the method of parameter controller.The study has shown that the results are?more accurate than conventional methods.At last, the method is applied to the lateral displacement prediction of the deep?excavation for Beixinqiao Subway Station of Beijing and the data are satisfactory.
Based on chaos theory, this paper determines the values of input neural network by menas of the arithmetic that?combining the average displacement with auto?correlation function.The prediction results are induced by the feedback?network and the 'jag points'?are reduced by the method of parameter controller.The study has shown that the results are?more accurate than conventional methods.At last, the method is applied to the lateral displacement prediction of the deep?excavation for Beixinqiao Subway Station of Beijing and the data are satisfactory.
2005, 35(4): 60-61,42.
doi: 10.13204/j.gyjz200504017
Abstract:
How to establish a proper model on the basis of the similitude law in a dynamic foundation test is discussed.There?search shows that the dynamic response of a dynamic foundation can be well simulated by a model test.
How to establish a proper model on the basis of the similitude law in a dynamic foundation test is discussed.There?search shows that the dynamic response of a dynamic foundation can be well simulated by a model test.
2005, 35(4): 62-64.
doi: 10.13204/j.gyjz200504018
Abstract:
The surface layer of the stratum in the Reservoir Zone of the Changjiang Gorges( RZCG) is loose deposits, The gravel content of gravelly soils in this region ranges from 30% to 70% .Storage of water in the RZCG is not taken into consideration when roads are being built.The gravelly soil foundation under inundation will be saturated, which will lead to the loss of its bearing capacity.Unfortunately, the standard currently in effect Specifications for Design of Ground Base and Foundation of Highway Bridges and Culverts ( JTJ 024- 85) , doesn't offer the values of the bearing capacity for saturated gravelly soil, which will bring inconvenience to the recheck and evaluation of the bearing capacity of saturated gravelly soil foundations.To solve the problem, experimental study is carried out firstly.Shear strength indexes of gravelly soil were tested under natural and saturated conditions, and the Laws of the development of cohesion and internal friction of gravelly soil are obtained.Based on testing results, the bearing capacity of the foundation of saturated gravelly soil are offered through a traditional formula for bearing capacity of gravelly soil, namley Bell solution of ultimate bearing capacity.The achievement provides reliable confidence to the recheck and evaluation of bearing capacity of gravelly soil foundations when water storage is done.
The surface layer of the stratum in the Reservoir Zone of the Changjiang Gorges( RZCG) is loose deposits, The gravel content of gravelly soils in this region ranges from 30% to 70% .Storage of water in the RZCG is not taken into consideration when roads are being built.The gravelly soil foundation under inundation will be saturated, which will lead to the loss of its bearing capacity.Unfortunately, the standard currently in effect Specifications for Design of Ground Base and Foundation of Highway Bridges and Culverts ( JTJ 024- 85) , doesn't offer the values of the bearing capacity for saturated gravelly soil, which will bring inconvenience to the recheck and evaluation of the bearing capacity of saturated gravelly soil foundations.To solve the problem, experimental study is carried out firstly.Shear strength indexes of gravelly soil were tested under natural and saturated conditions, and the Laws of the development of cohesion and internal friction of gravelly soil are obtained.Based on testing results, the bearing capacity of the foundation of saturated gravelly soil are offered through a traditional formula for bearing capacity of gravelly soil, namley Bell solution of ultimate bearing capacity.The achievement provides reliable confidence to the recheck and evaluation of bearing capacity of gravelly soil foundations when water storage is done.
2005, 35(4): 65-68.
doi: 10.13204/j.gyjz200504019
Abstract:
The water permeability concrete with recycled aggregate is prepared, whose variation regularity of strength and?permeability coefficient changing with aggregate- cement ratio, sand percentage and water- cement ratio is studied through?experiments.The significant parameters controlling the mixture ratio of this new environmental concrete are also presented in?the paper.By means of efficacy coefficient method, the optimal mixture ratio under the vibratory moulding condition is?aggregate- cement ratio 31 5, sand percentage 01 15 and water- cement ratio 01 34, and then the concrete strength and?permeability coefficient attain the equilibrium point.
The water permeability concrete with recycled aggregate is prepared, whose variation regularity of strength and?permeability coefficient changing with aggregate- cement ratio, sand percentage and water- cement ratio is studied through?experiments.The significant parameters controlling the mixture ratio of this new environmental concrete are also presented in?the paper.By means of efficacy coefficient method, the optimal mixture ratio under the vibratory moulding condition is?aggregate- cement ratio 31 5, sand percentage 01 15 and water- cement ratio 01 34, and then the concrete strength and?permeability coefficient attain the equilibrium point.
2005, 35(4): 69-71,47.
doi: 10.13204/j.gyjz200504020
Abstract:
It is studied that the permeability resistance, frost resistance, wear resistance and deformation properties of the?polypropylene fiber, polyethlene alcohol fiber and hybrid fiber reinforced expansive concrete.The study shows that fiber and?hybrid fiber will substantially enhance the permeability resistance, frost resistance and wear resistance of expansive concrete;hybrid fiber is superior to the unitary fiber; and fiber will have some restriction to the expansion of the expansive concrete.The analysis shows that the combination of fiber and micro- expansion will effectively improve the internal structure of the?concrete and reduce its primitive limitation caused by the distortion.Therefore a new technical approach to increase the?durability of the concrete is also explored.
It is studied that the permeability resistance, frost resistance, wear resistance and deformation properties of the?polypropylene fiber, polyethlene alcohol fiber and hybrid fiber reinforced expansive concrete.The study shows that fiber and?hybrid fiber will substantially enhance the permeability resistance, frost resistance and wear resistance of expansive concrete;hybrid fiber is superior to the unitary fiber; and fiber will have some restriction to the expansion of the expansive concrete.The analysis shows that the combination of fiber and micro- expansion will effectively improve the internal structure of the?concrete and reduce its primitive limitation caused by the distortion.Therefore a new technical approach to increase the?durability of the concrete is also explored.
2005, 35(4): 72-75.
doi: 10.13204/j.gyjz200504021
Abstract:
Architectural concrete is a kind of concrete coming from a new technology, which uses the structural concrete as?the skin of the building without any other outside finishing, and thus makes the architecture and the structure be a unity.Architectural concrete is quite different from conventional concrete in many aspects, such as the raw and processed materials,the mixture ratio between all kinds of the materials, the mixing technique, the material of form, compaction technique by?vibration and the curing method.The outline of Tianjin Museum is introduced; the concept of the concrete is reviewed.The?features of architectural concrete are described and the development history of architectural concrete is discussed.Through?the engineering application example of V-shaped columns built in Tianjin Museum, the material, design and construction?techniques of architectural concrete are studied, and its future application is also discussed.
Architectural concrete is a kind of concrete coming from a new technology, which uses the structural concrete as?the skin of the building without any other outside finishing, and thus makes the architecture and the structure be a unity.Architectural concrete is quite different from conventional concrete in many aspects, such as the raw and processed materials,the mixture ratio between all kinds of the materials, the mixing technique, the material of form, compaction technique by?vibration and the curing method.The outline of Tianjin Museum is introduced; the concept of the concrete is reviewed.The?features of architectural concrete are described and the development history of architectural concrete is discussed.Through?the engineering application example of V-shaped columns built in Tianjin Museum, the material, design and construction?techniques of architectural concrete are studied, and its future application is also discussed.
2005, 35(4): 76-78.
doi: 10.13204/j.gyjz200504022
Abstract:
The mechanical performance and smart property are contrasted among ordinary mortar and carbon fibrerein?forced?mortar( CFRM) and mixed fibrerein?forced mortar(MFRM) .Based on the contrast, a conclusion that the mixture of carbon?fibre and other fibres is in favor of popularizing CFRM as smart material is reached because the price can be cut down?sharply.
The mechanical performance and smart property are contrasted among ordinary mortar and carbon fibrerein?forced?mortar( CFRM) and mixed fibrerein?forced mortar(MFRM) .Based on the contrast, a conclusion that the mixture of carbon?fibre and other fibres is in favor of popularizing CFRM as smart material is reached because the price can be cut down?sharply.
2005, 35(4): 79-81,90.
doi: 10.13204/j.gyjz200504023
Abstract:
Development history and present condition of earthquake- resistant research on silos are reviewed and summarized?in the paper.In the last, the suggestions for direction of development of earthquake- resistant research on silos are also?advanced.
Development history and present condition of earthquake- resistant research on silos are reviewed and summarized?in the paper.In the last, the suggestions for direction of development of earthquake- resistant research on silos are also?advanced.
2005, 35(4): 82-84,94.
doi: 10.13204/j.gyjz200504024
Abstract:
Aimed at the wind- induced vibration of the long-span grid roof, based on FEM and the data obtained form the?wind tunnel test, an analysis of time- history is used to calculate the wind- induced vibration factor of vertical displacement of?the roof for Taizhou Stadium.Furthermore, the changing law of wind- induced vibration factors of the displacement of long?span roofs is also obtained.Characteristics of the dynamic wind- load factor are drawn.
Aimed at the wind- induced vibration of the long-span grid roof, based on FEM and the data obtained form the?wind tunnel test, an analysis of time- history is used to calculate the wind- induced vibration factor of vertical displacement of?the roof for Taizhou Stadium.Furthermore, the changing law of wind- induced vibration factors of the displacement of long?span roofs is also obtained.Characteristics of the dynamic wind- load factor are drawn.
2005, 35(4): 85-87.
doi: 10.13204/j.gyjz200504025
Abstract:
The beam element stiffness matrix of semi-rigidly connected steel frames is derived by using a rotation spring?which has variable stiffness to model bending behavior of beam- column semi-rigid connection.And by introducing a modified?beam linear stiffness and a modified beam rotation stiffness respectively, the equivalent substitution rigidly connected frame?method and the non- shear force distribution method are applied in structural analysis of unbraced steel frame with semi-rigid?connections.Those two kinds of calculation methods are relatively simple and easy.
The beam element stiffness matrix of semi-rigidly connected steel frames is derived by using a rotation spring?which has variable stiffness to model bending behavior of beam- column semi-rigid connection.And by introducing a modified?beam linear stiffness and a modified beam rotation stiffness respectively, the equivalent substitution rigidly connected frame?method and the non- shear force distribution method are applied in structural analysis of unbraced steel frame with semi-rigid?connections.Those two kinds of calculation methods are relatively simple and easy.
2005, 35(4): 88-90.
doi: 10.13204/j.gyjz200504026
Abstract:
In the field of reticulated shells, the research of joints is always a hot spot.But such research mainly focuses on?the intensity of various types of joints, the stiffness of joints is rarely involved.This paper is to analyze how the stiffness of?an often used joint in reticulated shells changes with the basic parameters of it in the elastic extent with the general FEA?program ANSYS.Then the approximately linear expressions on the stiffness to these parameters are given.Some discussions?on the reason why stiffness changes in some rules are presented.In the end, some valuable conclusions are achieved.
In the field of reticulated shells, the research of joints is always a hot spot.But such research mainly focuses on?the intensity of various types of joints, the stiffness of joints is rarely involved.This paper is to analyze how the stiffness of?an often used joint in reticulated shells changes with the basic parameters of it in the elastic extent with the general FEA?program ANSYS.Then the approximately linear expressions on the stiffness to these parameters are given.Some discussions?on the reason why stiffness changes in some rules are presented.In the end, some valuable conclusions are achieved.
2005, 35(4): 91-94.
doi: 10.13204/j.gyjz200504027
Abstract:
The actual ultimate strength of steel tube and core concrete is given according to steel tube yielded, with a view?of restriction of outer concrete and hoop bar on steel tube and core concrete.The calculation formula of axial compression?capacity for SRC columns with circle steel tube is established.The calculation results agree well with the test results.On the?basis of this, the relation between the ratio of radius-thickness and strength is also analyzed.Some advice is proposed for?design.
The actual ultimate strength of steel tube and core concrete is given according to steel tube yielded, with a view?of restriction of outer concrete and hoop bar on steel tube and core concrete.The calculation formula of axial compression?capacity for SRC columns with circle steel tube is established.The calculation results agree well with the test results.On the?basis of this, the relation between the ratio of radius-thickness and strength is also analyzed.Some advice is proposed for?design.
2005, 35(4): 95-96,99.
doi: 10.13204/j.gyjz200504028
Abstract:
Hankou Quanye tower, being a mutiple- function high- rise building, has a close relationship with its?environment, its design is not only a process of composing the inner space and outer space but also a process of?differentiation which imposes the environmental restrictions on its inner space.With a special conception, it offers a veryelastic inner space and creates a very characteristic outer image at the same time, thus giving an excellent space for urban?cultural life.
Hankou Quanye tower, being a mutiple- function high- rise building, has a close relationship with its?environment, its design is not only a process of composing the inner space and outer space but also a process of?differentiation which imposes the environmental restrictions on its inner space.With a special conception, it offers a veryelastic inner space and creates a very characteristic outer image at the same time, thus giving an excellent space for urban?cultural life.
2005, 35(4): 97-99.
doi: 10.13204/j.gyjz200504029
Abstract:
This text has mainly probed into the importance of the building creation in technology of the building from the?following three respects: development process of the technology of the building, forming and development of the technical?aesthetic view, application of technical thinking about architectural design, and it is conducted that a brief analysis of?current situation of building creation in our country.
This text has mainly probed into the importance of the building creation in technology of the building from the?following three respects: development process of the technology of the building, forming and development of the technical?aesthetic view, application of technical thinking about architectural design, and it is conducted that a brief analysis of?current situation of building creation in our country.
