基于抗损性的钢筋混凝土摇摆柱力学性能研究  

Mechanical properties of reinforced concrete rocking columns related to damage resistance

作　　者：朱春阳[1] 崔艳青 孙丽[1] 金峤[1] 张春巍 ZHU Chun-yang;CUI Yan-qing;SUN Li;JIN Qiao;ZHANG Chun-wei(Shenyang Jianzhu University,Shenyang 110168,China;Qingdao University of Technology,Qingdao 266525,China)

机构地区：[1]沈阳建筑大学,沈阳110168 [2]青岛理工大学,青岛266525

出　　处：《计算力学学报》2023年第1期34-42,共9页Chinese Journal of Computational Mechanics

基　　金：国家重点研发计划(2018YFC15043)资助项目。

摘　　要：抗震韧性将震后建筑的功能维持或快速恢复作为最终目标。构件层次的摇摆机制是实现主体结构功能可恢复的有效途径,但应以构件的抗损性为前提。以钢筋混凝土摇摆柱为对象,比拟弹性半空间局部受载经典拉芒(Flamant)理论,推导摇摆柱轴向应力分布弹性力学解答,以此为基础,假定摇摆柱侧移由柱端接触面转角和柱身弯剪变形引起,建立钢筋混凝土摇摆柱荷载-侧移力学模型,与有限元模拟结果对比验证合理性。开展轴压比和柱端强度分析,结果表明,在柱体抗损的前提下,单纯提高轴压比可提高柱体承载能力,但对侧移能力提升不显著;随着柱端材料强度提升,柱体承载力和侧移能力均显著改善,因此,采用柱端局部增强的方法改善钢筋混凝土摇摆柱工作性能具有可行性。The ultimate goal of seismic resilience is to maintain or quickly restore the function of a building after an earthquake.The tilt mechanism at the member level is an effective way to realize the restoration of the main structure function;however,the damage resistance of the members should be the premise.Considering a reinforced concrete(RC)rocking column as the object and by comparison with the classical Flamant theory of local loading in the elastic half-space,the elastic mechanical solution of the axial stress distribution of the rocking column was derived in this study.Furthermore,assuming that the lateral displacement of the rocking column is determined by the contact surface rotation angle of the column end and bending and shear deformation of the column body,the load-lateral displacement mechanical model of the RC rocking column was established and compared with finite element simulation results to verify its rationality.The analysis of axial compression ratio and column end strength was conducted,and the results showed that under the premise of column damage resistance,simply increasing the axial compression ratio increases the bearing capacity of the column but has an insignificant effect in improving the lateral displacement capacity.The bearing capacity and lateral displacement capacity of the column are significantly improved as the strength of the column end material increases.Therefore,it is feasible to improve the working performance of RC rocking column using the method of local reinforcement of the column end.

关 键 词：抗震韧性 摇摆柱 弹性半空间体 应力分布 力学模型 

分 类 号：TU432[建筑科学—岩土工程] O242.1[建筑科学—土工工程]