拓宽箱梁桥的抗震性能研究  

Research on Seismic Performance of Widened Box Girder Bridges

作　　者：谢助兵 李治国 Xie Zhubing;Li Zhiguo(Hubei Port and Shipping Ecological Supply Chain Company,Wuhan,Hubei 430022)

机构地区：[1]湖北港航生态供应链公司,湖北武汉430022

出　　处：《现代工程科技》2024年第16期17-20,共4页Modern Engineering Technology

摘　　要：为进一步提高拓宽桥梁的抗震性能,以某预应力混凝土连续箱梁桥为研究对象,借助MidasCivil有限元分析软件,对比分析了旧桥与新桥在不同工况下的地震响应。研究结果显示,拓宽桥梁在地震作用下顺桥向与横桥向均有显著位移,特别是横桥向地震导致墩底破坏严重。因此,要进一步提高桥梁整体刚度,加强墩底设计,确保地震等极端条件作用下桥梁的安全稳定。To further improve the seismic performance of widened bridges,a prestressed concrete continuous box girder bridge was taken as the research object.With the help of Midas Civil finite element analysis software,the seismic response of the old bridge and the new bridge under different working conditions was compared and analyzed.The results showed that the widened bridge experienced significant displacement in both the longitudinal and transverse directions under earthquake action,especially in the transverse direction where the earthquake caused severe damage to the pier bottom.Therefore,it is necessary to further improve the overall stiffness of the bridge,strengthen the design of the pier bottom,and further ensure the safety and stability under extreme conditions such as earthquakes.

关 键 词：桥梁拓宽 抗震性能 数值模拟 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]