考虑地震行波效应的高铁连续梁桥梁轨互制

闫 斌 戴公连 魏标

振动与冲击 ›› 2014, Vol. 33 ›› Issue (5) : 87-90.

PDF(1514 KB)
PDF(1514 KB)
振动与冲击 ›› 2014, Vol. 33 ›› Issue (5) : 87-90.
论文

考虑地震行波效应的高铁连续梁桥梁轨互制

  • 闫 斌 戴公连 魏标
作者信息 +

Interaction of CWR and High-speed Railway Continuous Beam Considering Seismic Traveling Wave

  • YAN Bin DAI Gong-lian WEI Biao
Author information +
文章历史 +

摘要

为研究行波效应下高速铁路连续梁桥与无缝线路的非线性互制作用,采用带刚臂的梁单元模拟梁体,用非线性杆单元模拟梁轨间的互制作用,建立了考虑纵向和竖向地震动行波效应的梁轨相互作用模型。以我国沪昆线上某(60+100+60)m连续梁桥为算例,分析了轨道结构对梁体和墩台地震响应的影响,研究了纵向和竖向行波效应下钢轨和墩台的受力特点。研究表明:轨道的存在可提高系统基频,降低连续梁桥地震响应;但在地震动的行波效应下,钢轨纵向力最大值可达一致激励下的1.2倍;减小线路纵向阻力,增加桥墩刚度可减小地震作用下的钢轨应力;在检算钢轨时,还应累计竖向行波效应对钢轨受力的影响。

Abstract

In order to study the nonlinear interaction between CWR(continuously welded rail) and continuous beam carrying high-speed railway under traveling wave effect, the beam element with rigid elements was used to simulate the beam, the nonlinear bar element was used to simulate the longitudinal interaction between beam and tracks. The track-structure interaction model was established for the first time with considering the longitudinal and vertical seismic traveling wave effect. Taking a (60 +100 +60) m continuous beam on the Shanghai-Kunming line as a case, it was analyzed that the track made an impact on the seismic response of the beam and pier, the force characteristics of the track and pier was studied under the longitudinal and vertical traveling wave effect. Studies have shown that the track can improve the system natural frequency and reduce the seismic response of the continuous beam; the maximum longitudinal stress on the track under the traveling wave effect is up to 1.2 times under the uniform excitation; calculating the track stress, the impact of the vertical traveling wave effect on the track should be also considered.



关键词

铁路桥梁 / 无缝线路 / 连续梁桥 / 行波效应 / 梁轨相互作用

Key words

railway bridges / continuously welded rail / continuous beam / traveling wave effect / track-structure interaction

引用本文

导出引用
闫 斌 戴公连 魏标. 考虑地震行波效应的高铁连续梁桥梁轨互制[J]. 振动与冲击, 2014, 33(5): 87-90
YAN Bin DAI Gong-lian WEI Biao. Interaction of CWR and High-speed Railway Continuous Beam Considering Seismic Traveling Wave[J]. Journal of Vibration and Shock, 2014, 33(5): 87-90

PDF(1514 KB)

Accesses

Citation

Detail

段落导航
相关文章

/