Research on Mechanical Properties of L-Shaped Steel-Reinforced Concrete Rectangular Columns Under Eccentric Compression

WU Chen; ZHANG Ying; XIANG Hong; MA Shenglan; JIANG Shaofei

doi:10.13204/j.gyjzG23030712

Volume 53 Issue 7

Jul. 2023

Turn off MathJax

Article Contents

Article Navigation > INDUSTRIAL CONSTRUCTION > 2023 > 53(7): 116-123,179

WU Chen, ZHANG Ying, XIANG Hong, MA Shenglan, JIANG Shaofei. Research on Mechanical Properties of L-Shaped Steel-Reinforced Concrete Rectangular Columns Under Eccentric Compression[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(7): 116-123,179. doi: 10.13204/j.gyjzG23030712

Citation:

WU Chen, ZHANG Ying, XIANG Hong, MA Shenglan, JIANG Shaofei. Research on Mechanical Properties of L-Shaped Steel-Reinforced Concrete Rectangular Columns Under Eccentric Compression[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(7): 116-123,179. doi: 10.13204/j.gyjzG23030712

Citation:

WU Chen, ZHANG Ying, XIANG Hong, MA Shenglan, JIANG Shaofei. Research on Mechanical Properties of L-Shaped Steel-Reinforced Concrete Rectangular Columns Under Eccentric Compression[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(7): 116-123,179. doi: 10.13204/j.gyjzG23030712

PDF( 14346 KB)

Research on Mechanical Properties of L-Shaped Steel-Reinforced Concrete Rectangular Columns Under Eccentric Compression

doi: 10.13204/j.gyjzG23030712

1. Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering, Fuzhou 350118, China;
2. School of Civil Engineering, Fuzhou University, Fuzhou 350108, China

Received Date: 2023-03-07

Abstract

Abstract

When L-shaped steel-reinforced concrete (SRC) rectangular columns are applied as corner columns in high-rise buildings, the problems of indirect force transmission and stress concentration caused by the discontinuity of T-shaped steel reinforced concrete columns can be avoided. In order to reveal the mechanical properties of L-shaped SRC columns under eccentric compression, five L-shaped SRC rectangular columns and one T-shaped SRC rectangular column with different load eccentricity, slenderness ratio and different steel distribution, respectively. All these specimens were tested under eccentric compression. The results showed that L-shaped steel developed crack asymmetrically under the non-uniform constraint of concrete; at the same cross-section height, the reinforcement and steel in the tension and compression zone of L-shaped steel SRC column did not yield concurrently. However, the steel asymmetry does not significantly reduce the bearing capacity and ductility of the specimens. Based on the experimental study, a finite element model was established to analyze the effects of eccentricity, slenderness ratio and web eccentricity on the mechanical properties of L-shaped steel SRC columns under eccentric compression. The model analysis showed that the boundary of the tension and compression zones of L-shaped steel SRC columns was an oblique line. However, because the slope was small and the bearing capacity of the specimen was not significantly different from that of T-shaped steel, the relative height of the compression zone could be simplified as a straight line in the design of the component section. Based on the analysis of finite element model under various working conditions, the paper suggested that the value of load eccentricity about 0.45 should be the preliminary criterion for the size bias in the design of component.
- L-shaped steel,
- SRC column,
- mechanical property under eccentric compression,
- slenderness ratio,
- web eccentricity

FullText(HTML)

References(17)

References

[1]	鞠松. 一种新型L形型钢混凝土异形柱节点承载力的研究[D]. 昆明:昆明理工大学, 2019.
[2]	周天华, 余吉鹏, 李亚鹏, 等. 单轴对称十字型钢混凝土短柱轴压性能试验研究[J]. 工程力学,2020, 37(12):157-170.
[3]	周天华, 余吉鹏, 张钰, 等. 单轴对称十字型钢混凝土中长柱偏压性能试验研究[J]. 工程力学,2021, 38(4):111-122.
[4]	王秋维, 史庆轩. T形型钢混凝土柱正截面承载力的计算方法探讨[J]. 力学与实践,2008, 30(5):24-27.
[5]	ZENG L, ZHOU Q, XU C, et al. Cyclic performance of concrete-encased composite columns with T-shaped steel sections[J]. International Journal of Civil Engineering, 2015, 13(4):455-467.
[6]	曾磊, 涂祥, 许成祥, 等. 非对称配钢钢骨混凝土柱抗震性能试验研究[J]. 建筑结构学报,2013, 34(3):141-151.
[7]	曾磊, 周琴, 吴圆圆, 等. 非对称配钢型钢混凝土柱受剪机理及承载力研究[J]. 建筑结构,2014, 44(4):30-43.
[8]	陈熠光, 曾磊, 肖云峰, 等. T形配钢钢骨混凝土柱抗震性能数值分析[J]. 地震工程学报,2017, 39(2):196-204.
[9]	曾磊, 涂祥, 吴园园. T形配钢型钢混凝土构件正截面承载力计算方法[J]. 工程力学,2013, 30(10):115-132.
[10]	LIU X P, ZENG L, XIAO Y F, et al. Experimental and numerical investigation on the cyclic behavior of SRC columns considering unsymmetrical confinement effect[J]. KSCE Journal of Civil Engineering,2022, 26(4):1880-1893.
[11]	吴琛, 邓芬, 陈柯丹, 等. 非对称十字形配钢SRC柱抗震性能试验研究[J]. 建筑结构学报,2022, 43(11):87-94.
[12]	吴琛, 范思炜, 麻胜兰, 等. 压电陶瓷传感器工作机理及在非对称十字形配钢SRC矩形截面柱损伤监测中的应用[J]. 建筑结构学报, 2023, 44(1):215-224.
[13]	杨金沙. 基于声发射技术的框架节点混凝土损伤评估方法研究[D]. 福州:福建工程学院, 2022.
[14]	郑志煌. 考虑不均匀约束效应的L形配钢SRC矩形截面柱受压性能研究[D]. 福州:福建工程学院, 2021.
[15]	黄维, 钱江, 周知. 考虑混凝土不同约束效应的型钢混凝土柱抗震性能模拟研究[J]. 工程力学, 2016, 33(5):157-165.
[16]	秦浩, 赵宪忠. 高含钢率骨架混凝土柱的滞回数值分析[J]. 结构工程师, 2014, 30(4):25-31.
[17]	戴绍斌, 曹兵, 黄俊. 改进的组合式L形钢管混凝土柱力学性能试验[J]. 哈尔滨工业大学学报, 2015, 47(3):122-128.