高速铁路大跨钢桁梁斜拉桥梁端锚固结构疲劳性能研究

卫星;强士中

振动与冲击 ›› 2013, Vol. 32 ›› Issue (23) : 180-185.

PDF(2082 KB)
PDF(2082 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (23) : 180-185.
论文

高速铁路大跨钢桁梁斜拉桥梁端锚固结构疲劳性能研究

  • 卫星,强士中
作者信息 +

Fatigue Performance of Cable-to-Girder Connection of Long Span High-speed railway Cable-stayed Bridge with Steel Truss

  • WEI Xing,QIANG Shi-zhong
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摘要

南京至安庆高速铁路线上主跨580m的安庆长江大桥的梁端锚固结构采用一种新的双拉板栓焊式锚箱结构。论文对铁路钢桁梁斜拉桥几种典型梁端锚固结构的结构特点及传力机理进行比较分析。为评估高速行车条件下双拉板栓焊式梁端锚固结构的抗疲劳性能,对其进行疲劳试验研究。选取斜拉索活载索力幅值最大的梁端锚固结构为研究对象,利用ANSYS建立锚固结构有限元模型,分析得到主要焊缝应力分布。根据列车的运营情况,考虑4线列车通过桥梁时的相遇概论,运用Miner疲劳损伤累积原则,得到梁端锚固结构的疲劳内力幅。采用1:2缩尺模型,完成梁端锚固结构模型疲劳试验。疲劳试验结果表明,安庆长江大桥所采用的双拉板栓焊式锚箱结构在其设计寿命期内不会发生疲劳开裂,疲劳性能满足设计要求。

Abstract

With double plate and anchor-box, a new bolt-welded cable-to-girder anchorage structure was used to connect cable with steel truss of Anqing Yangtze Rive Railway Bridge in high-speed railway from Nanjin to Anqing. Typical anchorage structures used in steel truss were introduced and mechanic behaviors of anchorages were investigated. In order to obtain the fatigue performance of cable-to-girder connection bearing high-speed train load, fatigue test was carried out. The cable-to-girder connection was selected as the research object, which bearing maximum cable force with live load acting. Using ANSYS, 3D finite element analysis on anchorage were carried out, and stress distributions on main welds of cable-to-girder connection were obtained. Based on trains encountering probability of trains were taken into account. According to Miner`s fatigue accumulation damage rule, fatigue load range at the cable-to-girder connection structure was determined. Using a specimen with a scale of 1:2, fatigue test was carried out. Test results showed that no fatigue cracks appeared in cable-to-girder connection during the service life of the bridge, and fatigue performance of the cable-to-girder connection of Anqing Yangtze River Railway Bridge could meet the need of design.


关键词

高速铁路 / 斜拉桥 / 梁端锚固 / 试验模型 / 疲劳性能

Key words

high-speed railway / cable-stayed bridge / cable-to-girder connection / testing specimen / fatigue performance

引用本文

导出引用
卫星;强士中. 高速铁路大跨钢桁梁斜拉桥梁端锚固结构疲劳性能研究[J]. 振动与冲击, 2013, 32(23): 180-185
WEI Xing;QIANG Shi-zhong. Fatigue Performance of Cable-to-Girder Connection of Long Span High-speed railway Cable-stayed Bridge with Steel Truss [J]. Journal of Vibration and Shock, 2013, 32(23): 180-185

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