STRUCTURAL SYSTEM AND SEISMIC PERFORMANCE OF THREE-TOWER SUSPENSION BRIDGES

摘要：

　　Due to the lack of effective longitudinal constraint for center tower,structural stiffness of three-tower suspension bridge becomes less than that of two-tower suspension bridge,and therefore it becomes more susceptible to the seismic action.By taking a three-tower suspension bridge-the Taizhou Highway Bridge over the Yangtze River with two main spans of 1080 m as example,seismic performance of the bridge is investigated by MIDAS/CIVIL finite element analysis,and effects of cables sag to span ratio,structural stiffness of the center tower,and longitudinal constraint of the girder on the seismic response of the bridge are investigated,and the favorable structural system is discussed with respect to seismic performance.The results show that large cables sag,flexible center tower and the longitudinal elastic cable between the center tower and the girder are favorable to improve structural seismic performance of long-span three-tower suspension bridges.

关键词： Three-tower suspension bridge seismic performance structural system

作者: Xinjun Zhang Hailing Sun

作者单位: College of Civil Engineering Architecture, Zhejiang University of Technology, Hangzhou 310032, P.R.China

会议类型: 国际会议

会议名称: The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)

会议地点: 武汉

会议语种:英文

页码: 1099-1104

在线出版日期: 2012-11-17（万方平台首次上网日期，不代表论文的发表时间）