配置HRB500高强钢筋混凝土受弯桥墩抗震性能  

Seismic behavior of HRB500 high strength reinforcement concrete bending bridge piers

作　　者：张健新[1,2] 李艳艳[1,2] 戎贤[1,2] 

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

出　　处：《世界地震工程》2016年第2期223-228,共6页World Earthquake Engineering

基　　金：天津市自然科学基金项目(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：通过对7个混凝土桥墩试件进行低周往复加载试验,研究配置HRB500高强钢筋的混凝土桥墩的抗震性能。分析轴压比、纵筋强度、箍筋强度和箍筋间距对混凝土桥墩抗震性能的影响。研究结果表明:随着桥墩试件轴压比增加,试件的滞回特性降低,承载能力提高,但变形能力及延性性能降低;加密箍筋能够改善桥墩试件的滞回性能和减缓桥墩的刚度退化,提高桥墩的承载能力及变形能力和延性性能。配置高强钢筋的滞回特性、承载能力、变形能力和延性性能等抗震性能指标优于配置普通钢筋的试件,其中同时配置高强纵筋箍筋的桥墩试件抗震性能指标情况最优。To research the seismic behavior of HRB500 high strength reinforcement concrete bridge piers, the seven concrete bridge piers were tested with low cycle loading. The effect on seismic behavior of axial compression ratio, longitudinal reinforcement strength grade, stirrup strength grade, stirrup space was analyzed. The result shows that with the increase of axial compression ratio, the hysteretic behavior, deformability and ductility performance becomes low, the bearing capacity becomes high. More stirrups can improve the hysteretic behavior, rigidity degeneration, bearing capacity, deformability and ductility performance. The seismic behavior of HRB500 high strength reinforcement concrete bridge piers is better than ordinary reinforcement concrete bridge piers in term of hysteretic behavior, bearing capacity, deformability and ductility performance. The seismic behavior of HRB500 high strength longitudinal reinforcement and stirrup concrete bridge piers is the best.

关 键 词：桥墩 HRB500 抗震性能 轴压比 箍筋间距 

分 类 号：U443.2[建筑科学—桥梁与隧道工程]