高桥墩桥梁抗震分析方法

近年来,在我国西部高烈度地震区出现了许多高墩桥梁,在强地震作用下高桥墩桥梁的反应与低桥墩桥梁相比具有明显的非线性行为,其中包括几何非线性和材料非线性,但是在现行规范中对高桥墩桥梁的抗震分析没有具体规定。本文总结了高桥墩桥梁的地震反应特点,以及高桥墩在地震作用下非线性行为的作用原理,并在此基础上系统总结基于弹塑性桥墩模型的地震反应分析过程,为以后此类高墩桥梁的地震反应分析提供可以借鉴的方法。

The Method of Aseismic Analysis for High-rise Pier Bridge

In recent years,a lot of high-rise bridge piers appear in the highly seismic region in the west of our country.The high-rise pier represents obviously non-linear behavior comparing with low pier bridge under strong earthquake, including geometry nonlinearity and material nonlinearity.But aseismic analysis of the high-rise pier bridge is not defined in the current code norm. This paper has summarized the feature of seismic response for high-rise pier and summarized analytic process basing on the pier model of plasticity.And this analysis method for the high-rise pier will be a good example for analysis.