区域经济理论：历史回顾与研究评述

先简支后桥面连续梁桥是我国当前大量应用的一种桥梁结构形式。现采用Sap2000有限元软件建立了梁桥的非线性动力模型；根据支座损伤指标，采用IDA方法进行梁桥支座的损伤分析。计算结果表明，连接墩支座损伤比中间墩支座损伤要大，且场地越软弱越容易发生支座破坏，建议对于三四类场地加大支承长度。

Historical Retrospect and Research Review on Regional Economic Theory

The simply supported bridge with continuous slab decks is widely used at present as a form of bridge structure. This paper establishes the nonlinear bridge dynamic model by Sap2000 finite element software. According to the bearing damage criterion, IDA analysis method is adopted for the bridge bearing damage process analysis. The calculation results show that the connection pier bearing damage is bigger than the middle pier bearing damage, and weaker is the site, more prone is the bridge to bearing damage. It is suggested that bearing length should be increased for bridge piers at Class Three or Four sites.