变轴力钢筋混凝土墩柱抗震性能试验研究  

Experimental investigations on the seismic behaviors of RC bridge piers under variable axial loads

作　　者：陈嵘[1,2] 雷俊卿 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京建筑大学北京高等学校工程研究中心,北京100044

出　　处：《振动与冲击》2017年第18期131-139,共9页Journal of Vibration and Shock

基　　金：国家自然基金资助项目(50878020;51178042;51478027)

摘　　要：为研究钢筋混凝土墩柱在变轴力往复荷载下的抗震性能,制作6个试件进行试验,1个试件承受恒定轴力,5个试件承受变轴力。试验对比研究恒定轴力和变轴力,变轴力试件不同纵筋配筋率、箍筋体积配箍率、高宽比对抗震性能的影响,分析上述参数变化对滞回曲线、裂缝分布、骨架线、位移延性系数、残余变形、耗能能力的影响趋势;试验表明轴力变化对位移、残余变形、破坏程度有较大影响。基于性能化设计理论总结试验,依据我国桥梁规范要求给出设计建议考虑变轴力的影响。To study the seismic performance of reinforced concrete（ RC） bridge piers under variable axial forces,cyclic loading tests were carried out on six specimens,of which one was under a constant axial load and the other five with different longitudinal reinforcement ratio,volumetric percentage of stirrups,and shear span ratio were subjected to variable axial forces. Based on the test results,the hysteretic curve,fracture distribution,skeleton line,displacement ductility factor,residual deformation and energy dissipation capacity of the tested specimens were studied. The results indicate that variable axial forces have apparent influence on the displacement,residual deformation,and the level of destruction of RC bridge piers. According to the performance-based seismic design and the codes of highway bridges,suggestions were proposed to consider varying axial loads during design.

关 键 词：钢筋混凝土桥墩 变轴力 抗震性能 性能化设计 

分 类 号：P315.9[天文地球—地震学] U448.34[天文地球—固体地球物理学]