新型分离式桥墩及其对桥梁抗震性能的影响  

A New Separated Pier and its Effect on Bridge Seismic Performances

作　　者：翁健健[1] 叶爱君[1] 商宇[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2013年第5期101-106,共6页Structural Engineers

摘　　要：针对墙式墩对桥梁横向抗震性能不利的问题,提出了一种新型分离式桥墩,并以一座规则的连续梁桥为例,采用延性抗震设计方法,分别对采用墙式墩和分离式墩的桥梁,进行地震反应分析和抗震验算,最后对抗震性能进行了详细的对比分析。结果表明,墙式墩抗弯强度较大,在地震作用下不易发生屈服,从而对能力保护构件提出很大的抗震需求,而采用分离式墩可以很大程度地降低对能力保护构件的抗震需求,有利于改善桥梁整体抗震性能。To improve the seismic performance of the bridge with wall-type piers in the transverse direction,a new separate pier was proposed.Taking a normal continuous beam bridge as a study case,seismic ductility design of the bridge with wall-type piers and separated piers were carried out,respectively.Both seismic rezsponse analysis and seismic check were performed.Then,the seismic performance were compared in detail.Results show that the wall-type piers,due to its large flexural strength,is unlikely to yield under design earthquakes in transverse direction.Therefore,it leads to large seismic demands for capacity-protected elements.The separated piers can reduce the seismic demands for capacity-protected elements significantly,in this way enhancing the bridge seismic performances.

关 键 词：桥梁 墙式墩 分离式墩 抗震性能 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]