高强钢筋混凝土桥墩抗震性能试验研究  

Effect of steel bar strength on aseismic behavior of bridge piers with high strength steel bars

作　　者：李艳艳[1,2] 李泽高 张学辉[3] 

机构地区：[1]河北工业大学土木工程学院,天津300401 [2]河北省土木工程技术研究中心,天津300401 [3]河北科技大学建筑工程学院,河北石家庄050018

出　　处：《河南理工大学学报（自然科学版）》2015年第2期281-286,共6页Journal of Henan Polytechnic University（Natural Science）

基　　金：天津市自然科学基金资助项目(12JCYBJC14100);河北省交通运输厅科技计划项目(Y-2012041);河北省交通运输厅科技计划项目(Y-2011052)

摘　　要：试验对配有HRB500高强钢筋混凝土桥墩试件进行低周往复加载试验,比较不同钢筋强度、箍筋间距和轴压比对桥墩试件的破坏特征、承载能力、位移、滞回特性、骨架曲线、刚度退化和耗能能力等抗震性能指标的影响。研究表明:钢筋强度、轴压比和箍筋间距对配有HRB500高强钢筋混凝土桥墩的抗震性能影响效果显著。增大钢筋强度、减小轴压比和减小箍筋间距都能够提高高强钢筋混凝土桥墩试件的变形能力,在提高桥墩试件滞回性能的同时,减缓试件的刚度退化。增大钢筋强度、增大轴压比和减小箍筋间距可以增强桥墩试件的极限承载力。Based on the low of cyclic loading experiments on bridge pier specimens, the analysis was carried out for the effect of different steel bar strength, stirrup spacing and axial compression ratio on aseismic behavior including damage characteristic,bearing capacity, displacement, hysteretic characteristic, skeleton curve, rigidity degradation, and energy dissipation of bridge pier specimens. It is shown that the steel bar strength, axial compression ratio, and stirrup spacing have great influences on aseismic behavior of the bridge pier with HRB500. With the increase of steel bar strength and the decrease of the axial compression ratio and stirrup spacing,the deformation capacity of. the bridge pier with high strength steel bar is enhanced, the hysteretic characteristic is improved, and the rigidity degradation becomes slow. The bearing capacity is enhanced with the increase of steel bar strength and axial compression ratio, and with the decrease of the stirrup spacing.

关 键 词：高强钢筋 低周往复荷载 承载力 抗震性能 

分 类 号：U443.2[建筑科学—桥梁与隧道工程]