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工字形截面型钢混凝土短柱受压性能研究*
周中一1,曹万林2,惠存3
摘 要

(1 中国地震局工程力学研究所地震工程与工程振动重点实验室, 哈尔滨 150080; 

2 北京工业大学建筑工程学院, 北京 100124;  3 中原工学院建筑工程学院, 郑州450007)

[摘要]为研究工字形截面型钢混凝土短柱的受压性能,设计了5个1/20缩尺工字形截面型钢混凝土短柱试件,各试件几何尺寸、配筋、配钢均相同,进行了不同偏心距、不同加载方向工况下的轴压、偏压单调加载试验。通过试验,分析了各试件的破坏特征、承载力、刚度及退化过程等。对比分析了偏心距、加载方向对工字形截面型钢混凝土短柱受压性能的影响规律。基于试验,进行了工字形截面型钢混凝土短柱受压承载力计算,计算结果与试验结果符合较好。研究表明:工字形截面型钢混凝土短柱具有良好的弹塑性变形能力和较高的承载力;随着偏心距的增大,工字形截面型钢混凝土短柱的承载力逐渐降低,弹塑性最大位移逐渐增大,延性逐渐增强,刚度退化逐渐减慢;偏心距相近时,与沿翼缘方向偏心加载的试件相比,沿工字形截面腹板方向加载的试件屈服荷载、极限荷载较高,延性性能较好。

[关键词]工字形截面; 型钢混凝土短柱; 受压性能; 试验研究

中图分类号:TU398文献标识码:A文章编号:1002-848X(2017)02-0043-05

 

Study on behavior of I-section steel reinforced concrete column under compression load

Zhou Zhongyi1, Cao Wanlin2, Hui Cun3

(1 Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080,  China; 2 College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China; 3 Shcool of Architecture and Civil Engineering, Zhongyuan  University of Technology, Zhengzhou 450007, China)

Abstract:To study the behavior of I-section steel reinforced concrete short column under compression load, five 1/20 scaled I-section steel reinforced concrete short column specimens with same geometry dimension, reinforcement and steel layout were tested under axial or eccentric (different eccentric direction , different eccentricity) monotonic loading. The failure characteristics, load-bearing capacity, stiffness and degradation process of the specimens were analyzed. The influence of eccentricity and eccentric direction on the compression behavior of I-section steel reinforced concrete short column pier was comparatively analyzed. The loading bearing capacity  of the I-section steel reinforced concrete short columns was calculated based on the test. The calculation results were well in agreement with the experimental results. The study shows that: I-section steel reinforced concrete short column has strong elastic-plastic deformation ability and high loading bearing capacity. With the increase of eccentricity,  the specimens′ loading bearing capacity reduces gradually, maximum elastic-plastic displacement increases gradually, ductility enhances gradually, stiffness degradation gradually slows down. Compared with the specimens subjected to eccentric load along the flange direction, the specimens with same eccentricity subjected to load along the web direction have higher load bearing capacity and better ductility performance.

Keywords:I-section; steel reinforced concrete short column; compression behavior; experimental study

 

*国家自然科学基金项目(51308011),中国博士后科学基金(2013M540031)。

 

作者简介:周中一,博士,副研究员,Email:zhouzy@iem.ac.cn。

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