迪那2气田高墩T形刚构桥抗震分析

Anti-seismic Analysis on High Pier of T-shaped Rigid Frame Bridge in Dina 2 Gas Field

结合迪那2气田T形刚构桥高墩的抗震时程分析,对比分析了薄壁墩和空心薄壁墩的动力特性及结构在单向激励和三维激励下的抗震性能,分析发现双薄壁墩和空心薄壁墩在截面特性和墩高基本一致的情况下,双薄壁墩较空心薄壁墩包含更多低频自振频率,频率分散,双薄壁墩的抗震性能优于空心薄壁墩。

Combined with the anti-seismic time history analysis on high pier of T-shaped rigid frame bridge in Dina 2 gas field,the anti-seismic performance of dynamic property and structure of a double thin-wall pier and a hollow thin-wall pier under one-way excitation and three-excitation are compared and analyzed.The analysis shows that when the section property and pier height of the double thin-wall pier is almost the same with the hollow thin-wall pier,the former includes more low natural frequency and decentralized frequency than the latter.The anti-seismic performance of the double thin-wall pier is superior to that of the hollow thin-wall pier.