不同边界条件下水滴形钢结构主塔斜拉桥地震响应研究  

Study on Seismic Response of Cable-stayed Bridge with Water-drop-shaped Steel Tower Under Different Boundary Conditions

作　　者：程金泉[1] 

机构地区：[1]中铁十五局集团有限公司,河南洛阳471013

出　　处：《施工技术》2015年第11期47-51,59,共6页Construction Technology

基　　金：河南省重点科技攻关项目(082102230026)

摘　　要：以安徽涡阳三桥为工程实例,分析比较了5种不同边界条件下水滴形钢结构主塔斜拉桥在不同方向地震波激励下塔梁的位移、内力响应规律。结果表明:塔梁刚接方式对梁塔竖向位移影响较大,但辅助墩个数对主塔竖向位移影响较小;辅助墩增多对主梁受力有利,但个数过多对主塔受力不利;塔梁刚接时塔梁间的相互作用可以提高结构的抗震性能,实际工程建议采用塔梁刚接且每跨设置1对辅助墩的形式来加强结构的整体抗震性能。Based on Anhui Third Woyang Bridge,the displacement and internal force responses of cablestayed bridge with water-drop-shaped steel tower under seismic wave from different directions under five boundary conditions were analyzed and compared. The results show that tower-girder rigid connection mode has the significant influence on vertical displacement of tower and girder,while the number of subsidiary pier has little effect on it. It is useful for the main girder to increase the number of subsidiary pier,while the excess is detrimental to the main tower. The interaction of tower and girder can improve anti-seismic property. Tower-girder rigid connection mode and setting a couple of subsidiary piers each span were supported to improve integral seismic behavior of the structures.

关 键 词：桥梁工程 斜拉桥 水滴形钢结构主塔 边界条件 地震响应 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]