桥梁地震碰撞机理和抗震设计建议  

Mechanism of Seismic Collision on Bridges and Aseismic Design Suggestions

作　　者：黄泰烈 朱敏[2] 曹凌飞[2] 申爱国[3] 

机构地区：[1]中铁西安勘察设计研究院有限责任公司,西安710054 [2]中铁二院工程集团有限责任公司,成都610031 [3]西南交通大学,成都610081

出　　处：《高速铁路技术》2015年第3期17-21,共5页High Speed Railway Technology

摘　　要：地震时梁部碰撞直接导致梁体或桥台破损,严重时会出现落梁、支座破坏。利用Midas/civil软件,通过建立有限元模型,对简支梁、连续梁和连续刚构桥梁地震碰撞模拟分析,揭示了桥梁地震碰撞的机理以及简支梁、连续梁和连续刚构桥梁地震碰撞的特点:制约桥梁地震碰撞的最重要因素是墩身高度、墩底的基础刚度,其他因素则包括诸如梁体重量、梁体与桥墩之间的结合方式、以及制动墩的位置等。碰撞事件的发生主要取决于结构自身的振动特性,结构的振动特性总体控制了碰撞次数和碰撞强度。提出了碰撞缓冲液压装置等防止桥梁地震碰撞破坏的有关设计建议和方案。When the earthquake occurs, collisions between beams will directly cause damages on beams and abutments, severe collisons will lead to beam falling or damages of bearings. The mechanism of seismic collision on bridges and seis-mic characters of simply supported beam, continuous beam and continuous rigid frame bridges are revealed by simulation analysis using Midas/civil software and building finite element model： The most critical factors influencing bridge seis-mic collision are pier height and stiffness of the pier foundation as well as other factors including beam weight, connec-tion mode between the pier and beam and braking pier position. The happening of collision mainly depends on the self oscillation characteristics of the structure which generally control the collision numbers and collision strength. Relevant design suggestions and solutions like collision buffer hydraulic device are proposed to prevent bridge damages from seis-mic collisions.

关 键 词：桥梁 地震 设计建议 

分 类 号：U442.55[建筑科学—桥梁与隧道工程] U442.59[交通运输工程—道路与铁道工程]