高速铁路简支梁桥地震反应特性研究

陈令坤;蒋丽忠;余志武;罗波夫;

振动与冲击 ›› 2011, Vol. 30 ›› Issue (12) : 216-222.

PDF(1823 KB)
PDF(1823 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (12) : 216-222.
论文

高速铁路简支梁桥地震反应特性研究

  • 陈令坤1,2; 蒋丽忠1,2; 余志武1,2; 罗波夫 1,2
作者信息 +

Study on earthquake characteristics of high-speed railway simply-supported girder bridge

  • Chen Lingkun1,2; Jiang Lizhong1,2; Yu Zhiwu1,2; Luo Bofu1,2
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文章历史 +

摘要

近年来高速铁路建设方兴未艾,地震作用下的高速铁路桥梁动力响应问题日益引起公众及研究者关注。基于有限元法,建立了高速铁路多跨简支梁桥的杆系单元全桥空间分析模型和单墩实体模型,利用有限元软件及弯矩-曲率关系程序,计算了不同地震强度、不同地震荷载组合下高铁桥梁在是否考虑桩土作用、不同车速以及不同墩高等工况下的弹塑性地震反应,分析了不同参数影响下的地震反应特性。计算与分析结果表明: 地质条件较好的情况下,桩土作用对地震响应的影响较小,可以采用简化方法考虑桩土作用;随着地震强度、车速和墩高等参数的增加,桥梁动力响应相应增加;地震波频谱特性对结构地震响应影响较大;桥墩在罕遇地震作用下会进入弹塑性状态,塑性铰在墩底形成,应加密墩底横向钢筋以保证其塑性变形能力。

Abstract

In recent years, along with fast development of high-speed railway, research on dynamic response of high-speed railway bridge under earthquake has raised great concern among common people and researchers. The finite element method is employed to establish the beam element space analysis model of the high speed railway bridge and solid model of single pier in this paper, by means of finite element software and bending moment-curvature relationship program, the elastic-plastic earthquake responses of high-speed railway bridge under different earthquake intensity and effect combination is calculated under different earthquake strength, different speeds and soil-structure interaction (SSI). The calculation results show that influence of the SSI on seismic responses is little under good geology condition, the simplified method can be adopt to consider the SSI; the seismic responses increase with the increase of earthquake strength, train speed and pier height; the frequency character of seismic wave have great effects on the seismic responses of structure; the piers bottom step into elastic-plastic stage and plastic hinge will be developed at the bottom of piers under the rare earthquake action, the stirrup densification should be taken into account to enforce the elastic-plastic deformation capacity of piers.

关键词

地震特性 / 高速铁路 / 简支梁桥 / 弹塑性分析

Key words

earthquake characteristics / high-speed railway / simply-supported girder bridge / elastic-plastic analysis

引用本文

导出引用
陈令坤;蒋丽忠;余志武;罗波夫;. 高速铁路简支梁桥地震反应特性研究[J]. 振动与冲击, 2011, 30(12): 216-222
Chen Lingkun; Jiang Lizhong; Yu Zhiwu; Luo Bofu;. Study on earthquake characteristics of high-speed railway simply-supported girder bridge[J]. Journal of Vibration and Shock, 2011, 30(12): 216-222

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