基于TCD的锚拉板疲劳性能分析与试验研究

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王会利,张岩,秦泗凤.基于TCD的锚拉板疲劳性能分析与试验研究[J].,2018,58(6):600-606

基于TCD的锚拉板疲劳性能分析与试验研究

Analysis and experimental research on fatigue performance of anchor plate based on TCD

DOI：10.7511/dllgxb201806008

中文关键词:临界距离理论(TCD)锚拉板数值分析疲劳试验

英文关键词:theory of critical distance (TCD)anchor plate numerical analysis fatigue test

基金项目:辽宁省博士科研启动基金资助项目(20170520138)；辽宁省教育厅科学研究项目(L2014027)；中央高校基本科研业务费专项资金资助项目(DUT15QY34).

作者	单位
王会利,张岩,秦泗凤

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中文摘要:

锚拉板广泛用于钢箱梁斜拉桥中，但锚拉板与锚管连接的倒圆角处存在应力集中，在动力荷载作用下容易发生疲劳破坏．以大连某斜拉桥为工程背景，对其锚拉板疲劳性能展开理论分析与试验研究．首先通过临界距离理论(theory of critical distance，TCD)对锚拉板的疲劳性能进行理论分析，通过“线法”得到锚拉板等效应力为141 MPa．然后进行疲劳试验，试验模型比例为1∶1.5．由试验测得锚拉板的最大等效应力32 MPa，最大变形3 mm，锚拉板在施加荷载过程中处于弹性工作状态．在200万次的疲劳加载后未发现裂纹．理论分析和疲劳试验结果表明，该斜拉桥锚拉板式索梁锚固结构在设计寿命期内，不会发生疲劳开裂．

英文摘要:

Anchor plate is widely used in steel box girder cable-stayed bridges, however there is a stress concentration at the connection between the anchor plate and the anchor pipe, which is prone to fatigue failure under dynamic load. Taking a cable-stayed bridge in Dalian as engineering background, the theoretical analysis and experimental research on the fatigue performance of its anchor plate are introduced. First of all, the fatigue performance of the anchor plate is analyzed with the theory of critical distance (TCD).The equivalent stress of the anchor plate is 141 MPa by ″linear method″. Next a fatigue experiment is performed, whose model ratio is 1∶1.5.The maximum equivalent stress of the anchor plate is 32 MPa and the maximum deformation is 3 mm from experiment. The anchor plate is in elastic working state during the loading process. After 2 million times fatigue loading, there are no cracks on the specimen.The theoretical analysis and fatigue experiment results show that the cable-stayed anchor plate will not undergo fatigue cracking during the design life.

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基于TCD的锚拉板疲劳性能分析与试验研究

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