简支混凝土梁桥Pushover分析简化方法

英文篇名：Simplified Pushover Analysis Method for Simply Supported Concrete Bridges
中文刊名：震灾防御技术
英文刊名：Technology for Earthquake Disaster Prevention
作者：王草 ; 包琦玮 ; 李全旺
英文作者：Wang Cao ; Bao Qiwei ; Li Quanwang ; Department of Civil Engineering ; Tsinghua University ; Beijing General Municipal Engineering Design and Research Institute
中文关键词：简支梁桥 ; Pushover分析 ; 抗震评估 ; 简化方法
英文关键词：Simply supported concrete bridges ; Pushover analysis ; Seismic safety assessment ; Simplified method
出版日期：2014-09-15
机构：清华大学土木工程系;北京市市政设计研究总院;
年：2014
期：03
出版单位：震灾防御技术

摘要

静力Pushover分析方法是研究结构在地震作用下力学性能的非线性分析方法,目前已经得到了广泛的运用。本文主要讨论了对于简支梁桥的简化Pushover分析方法。对于非高墩的规则桥梁,结构的重量主要来自于上部结构,因而可以把分析模型简化为单自由度体系。当给定了墩柱潜在塑性铰区的弯矩-曲率关系曲线后,可以通过简单的运算得到其Pushover曲线,从而避免了有限元建模的麻烦。该方法对于工程运用有着一定的参考价值。最后,结合算例表明了该简化方法的有效性。
The Nonlinear Static Pushover analysis is a method utilized for description of the structural seismic performance under strong earthquakes, and it has been widely used by many researchers. This paper mainly discusses the simplified Pushover method for simply supported concrete bridges. It is noted that for regular bridges with short piers, the structural weight comes mainly from the superstructure, with which the analytical model can be simplified as a single degree system. The Pushover curve can be obtained with simple algebra given the moment – curvature relationship of the section in the potential hinge area, indicating that one does not need to establish a finite element model to get the Pushover curve. Thus, the proposed method can be a valuable reference for practice. Finally, the accuracy of the simplified method is presented with an illustrative example.

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