Research on Structure and Bearing Capacity of Stiffened X-Joints of Lightweight Aggregate Concrete-Filled High-Strength Square Steel Tubes

JIN Hui; GUO Lixiang; ZHAO Wei; WANG Wanzhen

doi:10.13204/j.gyjzG23010601

Volume 53 Issue 4

Apr. 2023

Turn off MathJax

Article Contents

Abstract

References

Article Navigation > INDUSTRIAL CONSTRUCTION > 2023 > 53(4): 125-130,140

Peng Shuguang, Lian Feng. EXPERIMENTAL STUDY ON BEARING MECHANISM OF PILE-NET COMPOSITE FOUNDATION[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(6): 109-114. doi: 10.13204/j.gyjz201106023

Citation:

JIN Hui, GUO Lixiang, ZHAO Wei, WANG Wanzhen. Research on Structure and Bearing Capacity of Stiffened X-Joints of Lightweight Aggregate Concrete-Filled High-Strength Square Steel Tubes[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(4): 125-130,140. doi: 10.13204/j.gyjzG23010601

Peng Shuguang, Lian Feng. EXPERIMENTAL STUDY ON BEARING MECHANISM OF PILE-NET COMPOSITE FOUNDATION[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(6): 109-114. doi: 10.13204/j.gyjz201106023

Citation:

PDF( 7197 KB)

Research on Structure and Bearing Capacity of Stiffened X-Joints of Lightweight Aggregate Concrete-Filled High-Strength Square Steel Tubes

doi: 10.13204/j.gyjzG23010601

1. College of Urban Construction, Shuren University, Hangzhou 310015, China;
2. Zhejiang Zhongnan Green Construction Technology Group, Hangzhou 310052, China;
3. Center of Steel Bridge, Zhejiang Institute of Communications, Hangzhou 311112, China;
4. School of Civil and Environmental Engineering, Ningbo University, Ningbo 315211, China

Received Date: 2023-01-06
Available Online: 2023-07-01

Abstract

Abstract

In order to study the structure and bearing capacity of lightweight high-strength truss joints, static loading tests were carried out on X-joints with stiffened plates and basic X-joints of lightweight aggregate (LWA) concrete-filled Q345B steel square tubes. The effects of the stiffened plates between braces and chords and the LWA concrete poured into braces and chords on the failure mode and bearing capacity of X-joints were studied. Tests results showed that the failure modes of stiffened X-joints were weld cracking between stiffened plates and braces under shear and compression, tension failure of brace flange under shear and compression by stiffened plates, and shear and compression failure at sections of braces under shear and compression near stiffened plate outer edge. The failure mode of the basic X-joints was weld cracking between braces and chords. The yield and fracture process of X-joints were delayed and the bearing capacity of X-joints increased significantly due to the stiffened plates between braces and chords. Pouring LWA concrete into braces and chords could effectively prevent buckling of square steel tubes. The weld cracking load and the bearing capacity of stiffened X-joints were 63.3% and 18.3%, respectively, which were higher than those of the basic X-joints. According to the failure modes of stiffened X-joints, the calculation models were established and the bearing capacity calculation formulas were derived considering the effects of stress transfer and diffusion of stiffened plates for fracture of fillets between stiffened plates and braces under shear and compression, flange pulling of shear-pressure braces, shear-compression failure of shear-pressure braces of stiffened X-joints of lightweight aggregate concrete-filled high-strength square steel tubes. The calculation error of the suggested bearing capacity formula for stiffened X-joints was -27.8% to +3.7%.
- square steel tube,
- stiffened X-joint,
- LWA concrete,
- test,
- failure mode,
- bearing capacity

FullText(HTML)

References(11)

References

[1]	LI H T, BEN Y. Experimental investigation of concrete-filled high-strength steel tubular X joints[J]. Journal of Structural Engineering, 2018, 144(10)[2018-08-08].https://org.doi.10.1061/(CASE)ST.1943-541X.0002176.
[2]	XIE K Z, WANG H W, PANG J H, et al. Study of the ultimate bearing capacity of concrete-filled steel tube K-joints[J]. Journal of Civil Engineering, 2019, 23(5):2254-2262.
[3]	CHEN Y, FENG R, WANG C Y. Tests of steel and composite CHS X-joints with curved chord under axial compression[J]. Engineering Structures, 2015, 99:423-438.
[4]	IDRIS A M, FIDELIS R M, XIN Q Z. Parametric study and equation of the maximum SCF for concrete filled steel tubular T-joints under axial tension[J]. Thin-Walled Structures, 2018,129:145-156.
[5]	陈誉,张钻湖.主管中灌混凝土平面X形圆钢管混凝土节点平面内抗弯性能试验研究[J]. 土木工程学报,2012,45(8):1-7.
[6]	陈誉,张钻湖.腹杆内灌混凝土十字形圆钢管节点平面内抗弯性能试验研究[J]. 土木工程学报,2012,45(7):97-104.
[7]	赵必大,蔡扬政,王伟.支主管夹角对X形圆钢管节点平面外受弯性能影响[J]. 工程力学,2019,36(7):99-108.
[8]	中国工程建设标准化协会.矩形钢管混凝土结构技术规程:CECS 159:2004[S]. 北京:中国计划出版社,2004.
[9]	中华人民共和国建设部.轻骨料混凝土技术规程:JGJ 51-2002[S]. 北京:中国建筑工业出版社,2002.
[10]	中华人民共和国国家质量检验检疫总局.金属材料拉伸试验第1部分:室温试验方法:GB/T228.1-2010[S]. 北京:中国标准出版社,2010.
[11]	王万祯. 结构钢开裂准则及断裂试验分析[J]. 工程力学,2008,25(5):27-31.

Relative Articles

[1]	RONG Hua, FAN Xing-lang, GENG Yan, DONG Wei. Research on Creep Characteristics of Concrete Under Biaxial Compressive Stresses[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(9): 224-228. doi: 10.13204/j.gyjzG22062006
[2]	Ban Liren, Liu Hang, Lan Chunguan. NON-LINEAR FINITE ELEMENT ANALYSIS OF UNREINFORCED BRICK WALLS RETROFITTED WITH POST-TENSIONED TENDONS[J]. INDUSTRIAL CONSTRUCTION, 2015, 45(4): 168-172. doi: 10.13204/j.gyjz201504032
[3]	Pan Jianping, Wang Yuge, Zeng Qingyun, Song Yinglu. STUDY OF NONLINEAR SHEAR STRENGTH CHARACTERISTICS OF TAILINGS SAND UNDER HIGH STRESSES[J]. INDUSTRIAL CONSTRUCTION, 2015, 45(2): 80-84. doi: 10.13204/j.gyjz201502018
[4]	Tong Youzhi, Zhu Jinzhang. EXPERIMENTAL STUDY ON REINFORCED CONCRETE BEAMS STRENGTHENED BY EXTERNALLY PRESTRESSED VERTICAL TENSIONING METHOD[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(6): 83-87. doi: 10.13204/j.gyjz201206018
[5]	Yao Xihong, Yang Jianxin, Liu Mingzhou, Wang Hongjun. STUDY ON STRESS INCREMENT OF TENDON FOR EXTERNALLY PRESSTRESSED CONCRETE BEAMS[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(11): 136-139. doi: 10.13204/j.gyjz201211029
[6]	Liao Yanfen, Qi Yaqing, Ma Xiaoqian. NONLINEAR FINITE ELEMENT ANALYSIS OF REINFORCED CONCRETE BEAMS IN FIRE[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(7): 31-37. doi: 10.13204/j.gyjz201107007
[7]	Xiong Xueyu, Li Yang, Wang Meihua. NON-LINEAR ANALYSIS OF PRESTRESSED STEEL-CONCRETE COMPOSITE FRAMES[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(12): 34-38. doi: 10.13204/j.gyjz201112008
[8]	Li Junjun, Liu Xiaoqing. EXPERIMENTAL STUDY ON RAILWAY PLATE-GIRDER WITH THE EXTERNAL PRE-STRESSED REINFORCEMENT TECHNOLOGY[J]. INDUSTRIAL CONSTRUCTION, 2010, 40(2): 120-124,96. doi: 10.13204/j.gyjz201002028
[9]	Meng Shaoping, Wang Yunfei. DEFLECTION CONTROL OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH EXTERNAL TENDONS[J]. INDUSTRIAL CONSTRUCTION, 2009, 39(12): 29-31. doi: 10.13204/j.gyjz200912008
[10]	Jiang Chaowen, Zhang Jiwen. NON-LINEAR ANALYSIS OF CONCRETE BEAM-COLUMN ASSEMBLIES REINFORCED WITH FINE GRAINED HIGH STRENGTH STEEL BARS[J]. INDUSTRIAL CONSTRUCTION, 2009, 39(11): 40-44. doi: 10.13204/j.gyjz200911010
[11]	Wang Yunfei, Meng Shaoping, Liu Xiaoyan. EXPERIMENTAL STUDY ON THE FLEXURAL BEHAVIOR OF REINFORCED CONCRETE CONTINUOUS BEAMS STRENGTHENED WITH EXTERNAL PRESTRESSING[J]. INDUSTRIAL CONSTRUCTION, 2009, 39(12): 32-35. doi: 10.13204/j.gyjz200912009
[12]	Zhang Ke, Ye Lieping, Yue Qingrui. EXPERIMENTAL STUDY ON CONCRETE BEAMS STRENGTHENED BY CARBON FIBER CABLES WITH EXTERNAL PRESTRESS[J]. INDUSTRIAL CONSTRUCTION, 2008, 38(4): 104-108. doi: 10.13204/j.gyjz200804026
[13]	Yang Bo, Feng Xiaotong. STRENGTHENING REINFORCED CONCRETE PLATE BY EXTERNAL PRESTRESSING TECHNOLOGY[J]. INDUSTRIAL CONSTRUCTION, 2007, 37(10): 106-107. doi: 10.13204/j.gyjz200710028
[14]	Zhu Xiaowen, Sun Baojun, Shen Yingkun, Li Yanhe. FRAME STRENGTHENED WITH EXTERNAL PRESTRESSING STEEL TENDONS UNDER CYCLIC LOAD[J]. INDUSTRIAL CONSTRUCTION, 2004, 34(12): 80-82,66. doi: 10.13204/j.gyjz200412023
[15]	Xiong Xueyu, Gu Wei, Lei Liying. A SYSTEMATICAL STUDY ON THE DESIGN OF EXTERNALLY PRESTRESSED STRUCTURE[J]. INDUSTRIAL CONSTRUCTION, 2004, 34(7): 1-6. doi: 10.13204/j.gyjz200407001
[16]	Xiong Xueyu, Gu Wei, Li Yaming. THE SYSTEMS OF EXTERNAL PRESTRESSING:STATE-OF-THE-ART REVIEW AND PROSPECTS[J]. INDUSTRIAL CONSTRUCTION, 2004, 34(7): 50-53,60. doi: 10.13204/j.gyjz200407014
[17]	Gu Wei, Xiong Xueyu. THEORECTICAL INVESTIGATION OF EXTERNALLY PRESTRESSED STRUCTURES IN ELASTIC PHASE[J]. INDUSTRIAL CONSTRUCTION, 2004, 34(7): 7-11,15. doi: 10.13204/j.gyjz200407002
[18]	Xiong Xueyu, Gu Wei. THE DESIGN OF EXTERNALLY PRESTRESSED CONCRETE BEAMS WITH U-SHAPED CROSS-SECTION[J]. INDUSTRIAL CONSTRUCTION, 2004, 34(7): 25-27. doi: 10.13204/j.gyjz200407006
[19]	Xiong Xueyu, Gu Wei, Lei Liying. THE EVALUATION OF PRESTRESSING LOSS IN EXTERNALLY PRESTRESSED CONCRETE STRUCTURE[J]. INDUSTRIAL CONSTRUCTION, 2004, 34(7): 16-19. doi: 10.13204/j.gyjz200407004
[20]	Xiong Xueyu, Wang Shousheng. THE DEFLECTION CALCULATION OF EXTERNALLY PRESTRESSED CONCRETE BEAM[J]. INDUSTRIAL CONSTRUCTION, 2004, 34(7): 12-15. doi: 10.13204/j.gyjz200407003