在循环荷载下的节段拼装桥墩实体模型试验  

The Physical Model Tests on Precast Segmental Bridge Columns under Cyclic Loading

作　　者：包龙生[1] 王娟[1] 于玲[1] 张朋 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]沈阳南站工程建设指挥部,辽宁沈阳110179

出　　处：《沈阳建筑大学学报（自然科学版）》2013年第6期1030-1034,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51078242);住房和城乡建设部科学技术项目(2012-K2-31);辽宁省"百千万人才工程"人选项目择优资助项目(2012921047)

摘　　要：目的提出采用耗能钢筋以提高环形截面装配式桥墩在循环荷载作用下屈服强度、极限强度及耗能能力的方法.方法采用ABAQUS有限元分析软件模拟无粘结预应力、普通纵筋、耗能钢筋和箍筋约束下的节段装配式桥墩,得到其力-位移滞回曲线、耗能曲线和黏滞阻尼比曲线.结果进行截面换算后的环形截面较矩形中空截面的节段装配式桥墩屈服强度和极限强度都略有提高,但耗能能力相差不大.耗能钢筋配筋率为0.75%时比0.5%时提高较多,而配筋率为1.0%与0.75%相比较提高不多.结论在一定范围之内增加耗能钢筋的配筋率可以显著提高节段装配式桥墩的屈服强度、极限强度和耗能能力.This paper aims at analyzing mechanical performance of annular section segmental bridge pier un- der cyclic loading, and putting forward the method to improve yield strength, ultimate strength and energy dissipation capacity with the energy dissipation （ED） bars. With ABAQUS, a finite element analysis soft- ware, to simulate the segmental bridge pier with un-bonded pre-stressed tendons, common longitudinal bars, energy dissipation and stirrups, and get the load-displacement hysteretic curves, energy dissipation curves and viscous damping ratio curves. The results show that the annular section segmental bridge pier is increased slightly than the rectangular hollow section of the yield strength and ultimate strength, but the energy dissipa- tion capacity is almost the same. And yield strength, ultimate strength and energy dissipation capacity are im- proved obviously with ED bars. It is increased higher with 0.75 % than 0. 5 % of ED reinforcement ratio, but no significant increase with 1.0%. So that ED bars can significantly improve the yield strength, ultimate strength and energy dissipation capacity of segmental assembled bridge piers in a certain reinforcement ratio range.

关 键 词：节段拼装桥墩 有限元模型 循环荷载 滞回曲线 

分 类 号：TU997[建筑科学—市政工程] U442.5[建筑科学—桥梁与隧道工程]