我国现行轨道交通桥梁抗震设计规范探讨

An Approach to Current Codes for Seismic Design of Rail Transit Bridge

从设计角度出发,对《地铁设计规范》、《城市桥梁抗震设计规范》和《城市轨道交通结构抗震设计规范》在桥梁抗震设计标准、分析方法、设计加速度反应谱及设计方法等方面进行对比、分析,阐明各规范的设计原理及适用性。分析结果表明,《地铁设计规范》和《城市桥梁抗震设计规范》的设计方法较为简明,便于操作;《城市轨道交通结构抗震设计规范》的设计概念更加明确,设计方法更加具体,对结构在地震作用下的工作状态把握也更加精准。

From the view of design,this paper compares and analyzes some key points in bridge seismic design,such as seismic design standard,analysis method,seismic acceleration response spectra and design method,based on Code for Design of Metro,Code for Seismic Design of Urban Bridges,and Code for Seismic Design of Urban Rail Transit,and also clarifies the design theory and the applicability of the code. The results indicate that the design methods of Code for Design of Metro and Code for Seismic Design of Urban bridges are concise and operational. Meanwhile,the design concepts of Code for Seismic Design of Urban Rail Transit are explicit and its design method is more specific and accurate in illustrating structure working state during earthquake.