塔梁连接方式对大跨斜拉桥地震反应的影响

焦驰宇;李建中;彭天波

振动与冲击 ›› 2009, Vol. 28 ›› Issue (10) : 179-184.

PDF(2516 KB)
PDF(2516 KB)
振动与冲击 ›› 2009, Vol. 28 ›› Issue (10) : 179-184.
论文

塔梁连接方式对大跨斜拉桥地震反应的影响

  • 焦驰宇1,2;李建中2;彭天波2
作者信息 +

Different Connecting Styles between Towers and Deck Effects on Seismic Responses of Long-Span Cable-Stayed Bridge

  • Jiao Chiyu1,2;Li Jianzhong2;Peng Tianbo2
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摘要

探讨了塔梁连接方式对大跨斜拉桥地震反应影响的主要规律。对一座斜拉桥实例,利用反应谱分析法对塔梁之间采用弹性连接方式的斜拉桥地震反应进行了参数研究,详细分析了弹性索刚度变化引起斜拉桥地震反应影响的力学机理。利用非线性时程分析法对塔梁之间采用阻尼器连接的地震反应进行了参数研究,总结了阻尼器参数变化对斜拉桥地震反应的影响规律。此后,针对弹性索与阻尼器联合使用的方式进行了参数研究,总结了三种参数变化对地震反应的影响。综合比较各种塔梁连接方式的减震效果表明:在本文研究范围内单独使用阻尼器是大跨斜拉桥减震的最优连接方式。

Abstract

The main rules of different connection styles between towers and deck effects on seismic responses of cable-stayed bridge are discussed herein. Parametric study on the seismic responses of cable-stayed bridge with elastic connection through response spectrum analysis is done, mechanical mechanism of elastic connection stiffness effects on the seismic responses of cable-stayed bridge is analyzed in details. Furthermore parametric study on the seismic responses of cable-stayed bridge with viscous fluid dampers through nonlinear history analysis is done, the rules of damping constant and velocity exponent of dampers effects on the seismic responses of cable-stayed bridge is concluded as well. The seismic responses of the one with Hybrid application of elastic connections and dampers between towers and deck have been studied further. After comparison with other connection styles, it can be concluded that purely applying viscous fluid dampers is a best way of seismic reduction for long span cable-stayed bridge.

关键词

斜拉桥 / 减震 / 弹性连接装置 / 阻尼器 / 混合体系

Key words

Cable-stayed bridge / Seismic reduction / Elastic connection device / Viscous fluid damper / Passive hybrid system

引用本文

导出引用
焦驰宇;李建中;彭天波. 塔梁连接方式对大跨斜拉桥地震反应的影响 [J]. 振动与冲击, 2009, 28(10): 179-184
Jiao Chiyu;Li Jianzhong;Peng Tianbo. Different Connecting Styles between Towers and Deck Effects on Seismic Responses of Long-Span Cable-Stayed Bridge [J]. Journal of Vibration and Shock, 2009, 28(10): 179-184
中图分类号: U442.5   

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