桥梁抗震与抗风设计理念及设计方法研究

Research on Seismic and Wind Resistant Design Concept and Design Method of Bridge

地震波和风荷载会影响桥梁结构的受力特性,从而影响桥梁的工作状态和运营寿命。鉴于此,论文从重现期、作用方式、设防目标、破坏形式等方面对地震和风的特性进行对比,分析静力法、反应谱法、动态时程法、位移设计法等在桥梁抗震设计中的应用,探讨了风参数、桥梁动力特性、颤振临界风速、抖震效应等对桥梁抗风设计的影响,并研究了桥梁抗风静力计算、可靠性设计等。

Seismic wave and wind load will affect the mechanical characteristics of bridge structure,so as to affect the working state and service life of bridge.In view of this,this paper compares the characteristics of earthquake and wind from the aspects of return period,action mode,fortification target and failure form,then analyzes the applications of static method,response spectrum method,dynamic time history method and displacement design method in bridge seismic design,and discusses the wind parameters,bridge dynamic characteristics,flutter critical wind speed Buffeting effect on the wind resistant design of bridges,and the wind resistant static calculation and reliability design of bridges are studied.