摘要
对位于印度尼西亚南加里曼丹省劳特岛的1座双塔双索面半漂浮体系预应力混凝土斜拉桥进行模拟分析,结合该桥实际工程情况,采用有限元分析软件MIDAS/Civil建立计算模型,分析成桥状态和最大悬臂施工状态下的结构动力特性、静力特性及风荷载作用下的稳定性。研究结果表明,如果索塔纵向尺寸过小,可能导致结构稳定性安全系数降低;成桥状态和最大悬臂施工状态下的结构颤振稳定性指数>4. 0,应适当增加模型风洞试验检验抗风性能。
In this paper,a double-towers,double-cable-planes,semi-floating prestressed concrete cable stayed bridge in Laute Island,South Kalimantan,Indonesia is simulated and analyzed.The bridge model is established by using the finite element analysis software MIDAS/Civil combined with the actual engineering situation of the bridge.The structural dynamic characteristics,structural static characteristics and the stability of the bridge under wind load are analyzed in the completed state and the maximum cantilever construction state.The results show that if the longitudinal dimension of the pylon is too small,the instability coefficient of the structure may increase.The flutter stability index of the completed state and the maximum cantilever construction stage of the cable stayed bridge is more than 4.0.Appropriate model wind tunnel tests should be added to test the wind resistance of the bridge.
作者
史庆春
孙黎明
张征
杜烨
SHI Qingchun;SUN Liming;ZHANG Zheng;DU Ye(First Design Institute of Tianjin Municipal Engineering Design and Research Institute,Tianjin 300392,China;Tianjin Binhai New Area Rail Transit Investment&Development Co.,Ltd.,Tianjin 300450,China;School of Civil Engineering,Tianjin Chengjian University,Tianjin 300384,China)
出处
《施工技术》
CAS
2019年第15期99-102,共4页
Construction Technology
基金
国家自然科学基金(51678390)
天津市科技支撑计划重点项目(17YFZCSF01140)
关键词
斜拉桥
混凝土
预应力
半漂浮体系
稳定性
cable stayed bridges
concrete
prestressing
semi-floating system
stability
