斜向地震作用下高强钢筋混凝土柱抗震性能试验研究  

Experimental study on seismic behavior of high-strength reinforced concrete columns subjected to oblique earthquakes

作　　者：刘春阳[1,2] 于桂欣 李飞 郭长群 LIU Chunyang;YU Guixin;LI Fei;GUO Changqun(Department of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China;Key Laboratory of Building Structural Retrofitting and Underground Space Engineering(Shandong Jianzhu University),Ministry of Education,Jinan 250101,China)

机构地区：[1]山东建筑大学土木工程学院,济南250101 [2]山东建筑大学建筑结构加固改造与地下空间工程教育部重点实验室,济南250101

出　　处：《建筑结构》2021年第14期94-100,106,共8页Building Structure

基　　金：山东省自然科学基金(ZR2015EQ017,ZR2018MEE044)。

摘　　要：钢筋混凝土柱在斜向地震作用下的抗震性能是影响结构安全性的重要因素。以轴压比、加载角度和端部有无钢板网约束为参数,设计了5个高强钢筋混凝土柱,并对其进行了低周反复加载试验。分析了高强钢筋混凝土柱的滞回性能、承载力、延性和耗能性能抗震性能指标。结果表明,斜向加载时钢筋混凝土柱的抗震性能较主轴加载时变差,且随加载角度的增大,钢筋混凝土柱的承载能力降低,变形能力和耗能能力提高;端部采用钢板网约束可以有效增强对内部混凝土的约束作用,减轻柱端混凝土的压碎脱落程度,提高柱端塑性铰区域耗能能力,同时使柱的承载能力和变形能力等抗震性能得到显著改善。The seismic performance of reinforced concrete(RC)columns subjected to oblique earthquakes is an important factor affecting the safety of structures.Taking the axial compression ratio,loading angle and the presence or absence of steel mesh plate constraints at the ends as parameters,five high-strength RC columns were designed to carry out lowfrequency cyclic loading test.The seismic performance indices of high-strength RC columns such as hysteretic performance,bearing capacity,ductility and energy dissipation performance were analyzed.The results show that the seismic performance of RC columns is worse under oblique loading than under principal axis loading,and with the increase of the loading angle,the bearing capacity of RC columns decreases,but the deformation capacity and energy dissipation capacity increase.The use of steel mesh plate constraints at the ends can effectively enhance the restraint effect on the internal concrete,reduce the degree of crushing and shedding of the concrete at the ends of the columns,improve the energy dissipation capacity of the plastic hinge area at the end of the column,at the same time make the seismic performance such as the bearing capacity and deformation capacity of the column significantly improve.

关 键 词：高强钢筋混凝土柱 斜向地震 钢板网约束 抗震性能 低周反复加载试验 

分 类 号：TU398.[建筑科学—结构工程]