高强方钢管高强混凝土双向偏压短柱受力性能

李帼昌; 曹文正; 杨志坚; 冯兴; 陈博文

doi:10.13204/j.gyjzG19111310

高强方钢管高强混凝土双向偏压短柱受力性能

doi: 10.13204/j.gyjzG19111310

沈阳建筑大学土木工程学院, 沈阳 110168

基金项目:

“十三五”国家重点研发计划项目课题（2018YFC0705704）；国家自然科学基金重点项目（51938009）。

详细信息

作者简介:
李帼昌,女,1964年出生,博士,教授,博士生导师。电子信箱:liguochang0604@sina.com

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出版历程
- 收稿日期: 2019-11-13

MECHANICAL PROPERTIES OF HIGH-STRENGTH-CONCRETE-FILLED HIGH-STRENGTH-STEEL SQUARE-TUBE STUB COLUMNS UNDER BIAXIAL ECCENTRIC LOADS

School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China

摘要

摘要: 对6根高强方钢管高强混凝土双向压弯构件进行了试验研究，研究构件在不同偏心率（0.27~0.80）和钢材屈服强度（554~896 MPa）下的力学性能。采用有限元分析软件ABAQUS建立了高强方钢管高强混凝土双向偏压短柱有限元分析模型，模拟结果与试验结果吻合较好，并进行了典型构件的受力全过程分析和影响参数分析。研究结果表明：混凝土抗压强度、钢材屈服强度和含钢率对荷载-挠度曲线初始刚度影响较小，而偏心率对构件初始刚度影响相对较大；构件的极限承载力随着混凝土抗压强度、钢材屈服强度、含钢率的增加而增加，随着偏心率的增加而减小；构件的延性随着偏心率和含钢率的增加而增加，随着混凝土抗压强度的增加而减小。
- 高强方钢管 /
- 高强混凝土 /
- 双向偏压 /
- 短柱 /
- 参数分析
Abstract: An experimental research of 6 high-strength-concrete-filled high-strength-steel square-tube (HCHSST) stub columns subjected to biaxial eccentric loading was performed. The mechanical properties of the members with different eccentricity (0.27 to 0.80) and steel yield strength (554 to 896 MPa) were studied. The finite element analysis models of HCHSST stub columns under biaxial eccentric loading were established by the finite element analysis software ABAQUS.The numerical results were in good agreement with the experimental results, and the whole loading processes of the typical members and influence factors were analyzed. The results showed that concrete strength, steel yield strength and steel ratios had a little bit of influences on the initial stiffness of the load-lateral deflection curves of members. However, eccentricity had a relatively large influence on the initial stiffness of members, the ultimate bearing capacity of members increased with the increase of concrete strength, steel yield strength and steel ratios, and decreased with the increase of eccentricity. The ductility of members increased with the increase of eccentricity and steel ratios, and decreased with the increase of concrete strength.
- high-strength-steel square-tube /
- high-strength concrete /
- biaxial eccentric loading /
- stub column /
- parametric analysis

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