1. School of Civil Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China;
2. Highway Design & Research Institute, Sichuan Provincial Transport Department, Chengdu Sichuan 610041, China
Dynamic Properties of Long-span Steel-concrete Composite Bridges with External Tendons
WANG Wei-an1, LI Qiao1, ZHAO Can-hui1, ZHUANG Wei-lin2
1. School of Civil Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China;
2. Highway Design & Research Institute, Sichuan Provincial Transport Department, Chengdu Sichuan 610041, China
摘要The dynamic performance of large-span steel-concrete composite bridges with external tendons is investigated by deriving the formula of equivalent damping ratio of composite bridges, and by analyzing the influence of shear connectors stiffness of composite girders, interface slip, external tendons, and pile-soil dynamic interactions on the dynamic properties of steel-concrete composite bridge. Finite element calculations indicate that the equivalent damping ratio has significant influence on the dynamic response while the shear stiffness of grouped stud shear connectors and the prestressed levels of external tendons have different but relatively smaller influence on the free vibration frequency of long-span composite bridges; the influence of pile-soil interaction on the structural dynamic response of the composite bridge is clear.
Abstract：The dynamic performance of large-span steel-concrete composite bridges with external tendons is investigated by deriving the formula of equivalent damping ratio of composite bridges, and by analyzing the influence of shear connectors stiffness of composite girders, interface slip, external tendons, and pile-soil dynamic interactions on the dynamic properties of steel-concrete composite bridge. Finite element calculations indicate that the equivalent damping ratio has significant influence on the dynamic response while the shear stiffness of grouped stud shear connectors and the prestressed levels of external tendons have different but relatively smaller influence on the free vibration frequency of long-span composite bridges; the influence of pile-soil interaction on the structural dynamic response of the composite bridge is clear.
基金资助:Supported by the National Natural Science Foundation of China (No.51178393)
通讯作者:
WANG Wei-an, vten1@163.com
E-mail: vten1@163.com
引用本文:
汪维安, 李乔, 赵灿晖, 庄卫林. 大跨度体外预应力钢-混组合结构桥梁的动力特性分析[J]. Journal of Highway and Transportation Research and Development, 2013, 7(4): 30-38.
WANG Wei-an, LI Qiao, ZHAO Can-hui, ZHUANG Wei-lin. Dynamic Properties of Long-span Steel-concrete Composite Bridges with External Tendons. Journal of Highway and Transportation Research and Development, 2013, 7(4): 30-38.
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2013, Vol. 7 
