基于塑性铰模型和纤维模型的高墩连续刚构桥弹塑性地震反应对比分析

Elastic-Plastic Comparative Analysis of Seismic Response of a Continuous Rigidframe Bridges with High-Rise Piers Based on Fiber Model and Plastic-Hinge Model

针对在强震和中震作用下高墩会进入塑性状态的特性,此时材料的应力应变关系已不再是弹性范围,本文分别采用塑性铰模型和纤维模型对罕遇地震作用下连续刚构桥进行弹塑性地震反应对比分析,对桥墩的弹塑性特性进行比较研究,为抗震设计和计算提供参考和借鉴。

As the high-rise piers will come into the state of plastic under earthquakes,a calculation model of a continuous rigid-frame bridges is established and the elastic-plastic seismic properties of a continuous rigid-frame bridges are investigated compared with the fiber model and the plastic-Hinge model.The results of the analysis may serve as reference to the seismic design of other bridges with high-rise piers.