双链式悬索桥地震反应特征研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (4) : 184-188.

论文

双链式悬索桥地震反应特征研究

丁南宏1,2; 林丽霞1; 钱永久2;王常峰1

作者信息 +

seismic response characteristics of double cables suspension bridge

DING Nan-hong1,2; LIN Li-xia1;QIAN Yongjiu2 ;Wang Chang-feng1

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文章历史 +

摘要

双链式悬索桥采用钢加劲梁和钢筋混凝上索塔，使得阻尼在全桥中呈非经典阻尼耗能特性，导致主坐标系中的运动方程耦联。基于复阻尼理论求解等效粘滞阻尼比，以近似描述非经典阻尼体系的阻尼耗能特性。考虑几何非线性及非经典阻尼因素，对一座双链式悬索桥进行了地震反应谱和时程反应分析。引入主缆形状系数，将单链式悬索桥作为双链式悬索桥的特例，就同跨度同矢高的双链式悬索桥和单链式（普通式）悬索桥地震反应进行对比分析，揭示双链式悬索桥地震反应特征。双链式悬索桥地震反应特征的研究对该类桥设计选型、动力性能评估及抗震加固设计都有重要的工程意义

Abstract

Damping in double Cables suspension bridge composed of steel reinforcement beams and reinforced concrete tower is non-classical, which leads to coupled equations of motion in main coordinate system. Based on the complex damping theory, the viscous damping ratio is solved, which can be used to describe energy dissipation characteristics of non-classical damping system approximately. seismic response of double chains suspension bridge is analyzed through an example of double chains suspension bridge, considering the geometric nonlinearity and non-classical damping. and numerical calculation is presented for seismic response subjected to independent effect or combination effect of three orthogonal components of seismic wave. Single cable suspension bridge can be taken as a special case of double cable suspension bridge, after the main cable shape coefficient is introduced. The dynamic responses of double cable suspension bridge and single cable suspension bridge are compared to reveal the characteristics of Seismic Response of double cable suspension bridge. The study of the dynamic responses characteristics of double cable suspension bridge has a positive significance on structural form selection of such type bridge during designing, dynamic performance evaluation and reinforcement design has positive significance.

导出引用

丁南宏;林丽霞;钱永久;王常峰. 双链式悬索桥地震反应特征研究[J]. 振动与冲击, 2012, 31(4): 184-188

DING Nan-hong;LIN Li-xia;QIAN Yongjiu;Wang Chang-feng. seismic response characteristics of double cables suspension bridge[J]. Journal of Vibration and Shock, 2012, 31(4): 184-188