摩擦摆支座隔震连续梁桥地震能量反应研究

张常勇1,2,钟铁毅2,杨海洋2

振动与冲击 ›› 2017, Vol. 36 ›› Issue (16) : 63-67.

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (16) : 63-67.
论文

摩擦摆支座隔震连续梁桥地震能量反应研究

  • 张常勇1,2,钟铁毅2,杨海洋2
作者信息 +

Study on Seismic Energy Responses of a Continuous Girder Bridge isolated by Friction Pendulum System

  • ZHANG Changyong1, ZHONG Tieyi2, YANG Haiyang2
Author information +
文章历史 +

摘要

以某三跨混凝土连续梁桥为例,建立了该桥的空间有限元分析模型,在三条人工地震波作用下,采用非线性时程分析方法计算了应用摩擦摆支座(FPS)隔震前、后结构的纵向地震能量反应,对比了三种隔震体系的耗能效果,并研究了FPS等效滑动半径和摩擦系数对能量反应及分配的影响。分析研究结果表明:采用FPS隔震后结构体系绝大部分地震能量由支座耗散,可有效降低结构的能量耗散需求,保护结构安全,其中全桥隔震方案效果最好。增大等效滑动半径和摩擦系数均有利于提高FPS支座耗能减震效果,结构能量耗散需求随之减小,但当等效滑动半径和摩擦系数较大时,继续增大设计参数对耗能减震效果的改善作用趋于不变。

Abstract

Abstract: A 3D finite element analysis model of a continuous concrete girder bridge was established as an example. Under the excitations of three artificial earthquake waves, the energy responses of the non-isolated bridge and FPS isolated bridge were calculated using non-linear time history analysis method in longitudinal direction and the energy dissipation effects of three isolation schemes were compared. Furthermore, the effects of equivalent sliding radius and friction coefficient on the energy responses and the energy distributions were also investigated. The research results indicated that, for isolated bridge, most seismic energy was dissipated by FPS and the energy dissipation demand of bridge structure was decreased efficiently, and the effect of full isolation scheme was best one among three different isolation schemes. The energy dissipation efficiencies of FPS were enhanced and the structure energy dissipation demands were effectively decreased with the increments of both equivalent sliding radius and friction coefficient. But when the equivalent sliding radius and the friction coefficient were comparatively large, the enhancement of energy dissipation efficiency trend to be little.
 

关键词

桥梁工程 / 连续梁桥 / 减隔震设计 / 摩擦摆支座 / 能量反应

Key words

bridge engineering / continuous girder bridge / isolation design / friction pendulum system / energy response

引用本文

导出引用
张常勇1,2,钟铁毅2,杨海洋2. 摩擦摆支座隔震连续梁桥地震能量反应研究[J]. 振动与冲击, 2017, 36(16): 63-67
ZHANG Changyong1, ZHONG Tieyi2, YANG Haiyang2. Study on Seismic Energy Responses of a Continuous Girder Bridge isolated by Friction Pendulum System[J]. Journal of Vibration and Shock, 2017, 36(16): 63-67

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