高墩大跨径连续刚构桥抗震性能评估

高墩大跨径连续刚构桥的抗震性能评估既是桥梁抗震研究的热点又是抗震研究的难点。本文根据其特点提出了一种适合于其弹塑性地震响应的分析方法，利用提出的塑性铰单元和已有的有限元程序，实现了对罕遇地震作用下桥梁结构的地震响应模拟。使地震波峰值逐渐增大直至结构破坏，对西部某高墩大跨径连续刚构桥进行了弹塑性地震响应分析，得到了该种桥型的破坏形式、能够承受的最大地震等级等结论，为抗震设计提供参考。

Aseismatic performance evaluation of a long-span continuous rigid frame bridge with tall piers

The seismic performance evaluation of a high-pier long-span continuous rigid frame bridge is an interesting and formidable issue in seismic analysis of bridges. An elastic-plastic seismic response analysis was put forward based on its characteristics. The simulation of the seismic response of bridge under severe earthquake was carried out by using the plastic hinge element in the text and finite element program on hand. With the intensity of earthquake up to which caused the fracture of the bridge, the elastic-plastic seismic response analysis of a high-pier long-span continuous rigid frame bridge in the west was realized, and some available conclusions such as the failure mode, the greatest intensity that bridge could afford were got, which were useful to the seismic design.