高震区城市桥梁门式墩合理结构形式研究  

Research on Reasonable Structural Form of Portal Pier of Urban Bridge in High Seismic Region

作　　者：门士林 刘鸿博 MEN Shilin;LIU Hongbo(China Railway Design Corporation,Tianjin 300308,China;Gansu Province Transportation Planning,Survey&Design Institute Co.,Ltd.,Lanzhou 730030,Gansu,China)

机构地区：[1]中国铁路设计集团有限公司,天津300308 [2]甘肃省交通规划勘察设计院股份有限公司,甘肃兰州730030

出　　处：《工程技术研究》2024年第15期14-18,共5页Engineering and Technological Research

摘　　要：在城市桥梁建设中,当新建桥梁与既有设施交会或桥下净空受限时,常采用门式墩合理避让桥下构造物。文章结合某高震区桥梁工程实例,研究了盖梁与墩柱线刚度比对四柱门式墩受力的影响,给出了边墩设置支座的预应力混凝土盖梁和墩柱与钢盖梁固结的两种方案,进行了抗震性能分析及工程经济性对比。结果表明,后者抗震性能更优,工程经济性更好,可在城市桥梁建设中推广。In the construction of urban bridges,when the new bridge intersects with the existing facilities or the clearance under the bridge is limited,the portal pier is often used to reasonably avoid the structures under the bridge.Based on a bridge engineering example in the high seismic region,this paper studies the infl uence of the stiff ness ratio of bent cap to pier column on the stress of four-column portal pier,and gives two schemes of prestressed concrete bent cap with support on side pier and consolidation of pier column and steel bent cap.The seismic performance analysis and engineering economy comparison are carried out.The results show that the latter one has better seismic performance and engineering economy,which can be popularized in urban bridge construction.

关 键 词：高震区 城市桥梁 门式墩 刚度比 抗震性能 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]