能力谱方法在梁桥抗震性能评估中的比较研究

本文在阐述了能力谱方法的基本原理和实施步骤的基础上，比较了五种不同的改进能力谱方法在计算原理和实施步骤上的差异，并对它们的特点进行了剖析。然后，用这五种能力谱方法分别对9个中短周期的梁桥纵桥向的简化模型进行6条地震波下目标位移的估计，并以非线性时程分析结果为标准，比较了这五种方法的计算精度。结果显示，前三个短周期体系方法的误差离散性比较大，周期大于0．65s后的误差基本稳定在±30％以内，使用非弹性反应谱的方法计算结果误差在±30％以内的个数多于对应使用弹性反应谱的方法，此外，精度较好的两条波，对应反应谱加速度峰值较小，且附近加速度变化较平缓。

Comparative study on capacity spectrum methods for estimating seismic performance of girder bridges

In this paper,the fundamental theory and application procedure of capacity spectrum method are introduced,a comparison of calculation principles and application procedures among five improved capacity spectrum methods is made,and a discussion on the characters of these methods is made too.Then,taking the results of nonlinear time history analysis as a standard,the target displacements of these five capacity spectrum methods for 9 simplified girder bridge models with middle-low periods in the longitudinal di...