L形配钢型钢混凝土矩形柱偏压力学性能研究

吴琛; 张颖; 项洪; 麻胜兰; 姜绍飞

doi:10.13204/j.gyjzG23030712

L形配钢型钢混凝土矩形柱偏压力学性能研究

doi: 10.13204/j.gyjzG23030712

1. 福建省土木工程新技术与信息化重点实验室, 福州 350118;
2. 福州大学土木工程学院, 福州 350108

基金项目:

福建省高校产学合作项目（2022H6032）；福州市科技计划项目（2021-P-048）。

详细信息

作者简介:
吴琛,女,1978年出生,教授,博士生导师。电子信箱:wuchen2001@126.com

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出版历程
- 收稿日期: 2023-03-07

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

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

摘要

摘要: L形配钢型钢混凝土（SRC）矩形柱用作高层建筑角柱时，可避免T形配钢SRC柱梁柱型钢不连续造成的传力不直接和应力集中问题。为揭示L形配钢SRC柱偏压力学性能，设计了不同荷载偏心率、长细比和不同配钢形式的5根L形配钢SRC矩形柱和1根T形配钢SRC矩形柱并对其开展偏心受压试验。结果表明：L形型钢在混凝土的不均匀约束作用下，试件裂缝双向不对称发展，且在同一截面高度处，L形配钢SRC柱拉压区的钢筋和型钢不同时屈服；但型钢不对称并没有明显降低试件的承载力和延性。在试验研究基础上建立有限元模型，拓展分析荷载偏心率、长细比、腹板偏心对L形配钢SRC柱偏压力学性能的影响。模型分析表明：L形配钢SRC柱的拉压区界限呈斜直线，但因斜率较小且试件承载力与T形配钢方式无明显差异，在构件截面设计时相对受压区高度可按直线进行简化；分析多种工况的有限元模型，建议取荷载偏心率0.45作为构件设计时大小偏压的初步判别标准。
- L形配钢 /
- 型钢混凝土柱 /
- 偏压力学性能 /
- 长细比 /
- 腹板偏心
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

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参考文献(17)

[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.