独塔斜拉桥拱形主塔动力特性分析

Analysis on Dynamic Property of Arched Main Tower of Cable-Stayed Bridge with Single Tower

斜拉桥的主塔动力分析是斜拉桥设计的行为基础,结合海城市同泽大桥主桥对拱形主塔结构采用多振型反应谱法在E2地震力作用下的动力特性进行了分析,结果显示横桥向的地震力响应对结构影响较大;采用有限元法对拉索顶、塔梁固结顶、塔根部三个截面进行分析和抗震验算,桥梁满足设计规范要求。

The dynamic analysis of main tower of cable - stayed bridge is the behavior base of cable - stayed bridge design. In combination with multi- mode response spectrum method adopted by main bridge of Tongze Bridge in Haicheng city on arched main tower structure, the force is analyzed. The result shows that the response of dynamic property under the effect of E2 earthquake earthquake force of direction across bridge exerts a large influence on the structure. The analysis and antiseismic checking calculation on the top of stay rope, tower beam consolidation top and tower root are made by adopting finite element method, and the bridge can meet the requirement of design standard.