新型三向预应力钢筋混凝土桥墩抗震性能试验研究  

Experimental study on seismic performance of the three-direction prestressed reinforced concrete bridge piers

作　　者：杨勇[1] 张锦涛[1,2] 李亚宁 李辉[1] 叶俊[1] 马新堡 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安体育中心控股有限公司,陕西西安710026

出　　处：《西安建筑科技大学学报（自然科学版）》2017年第6期804-811,共8页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金项目(51578443);国家重点研发计划(2016YFC0701400);陕西省科学研究计划项目(2011KJXX42);西安建筑科技大学创新研究团队项目

摘　　要：为提高钢筋混凝土桥墩的自复位性能和抗震性能,先对钢筋混凝土桥墩施加竖向预应力,后采用预应力钢带对桥墩施加横向双向预应力,形成三向预应力钢筋混凝土桥墩形式.结合4个三向预应力钢筋混凝土桥墩试件和2个普通钢筋混凝土桥墩对比试件的低周反复加载拟静力试验,对三向预应力钢筋混凝土桥墩受力机理、自复位性能和抗震性能开展了详细研究,并着重分析了试件的裂缝发展情况、破坏形态、滞回曲线、骨架曲线、耗能能力、延性和自复位能力.研究结果表明,所提出的新型三向预应力钢筋混凝土桥墩相对普通钢筋混凝土桥墩,是自复位性能得到明显改善和提高.To improve the self-centering ability and seismic performance of remtorcecl concrete phage piers, a new kind of three-direction prestressed reinforced concrete bridge pier was created and introduced, in which vertical prestressed steel rode and horizontal two-direction prestressed steel strips were both used to introduce three prestressed stress in the piers. Based on experimental results of four specimens of this new kind of three-direction prestressed reinforced concrete pier specimens and two control common reinforced concrete specimens without any prestressing, the self-centering performance, mechanical performance and seismic performance of the three- direction prestressed reinforced concrete pier were fully studied, which means the development of cracks, failure patterns, hysteretic curves, skeleton curves, energy dissipation, ductility and self-centering ability were mainly analyzed. According to the comparing analysis with that of two reinforced concrete bridge pier control specimens, it was found that the new three-direction prestressed reinforced concrete bridge piersr seismic performance, especially self-centering ability, was obviously improved and made better.

关 键 词：预应力钢筋混凝土 桥墩 三向预应力 抗震性能 自复位结构 试验研究. 

分 类 号：TU378.3[建筑科学—结构工程]