| 香港青马大桥在交通荷载作用下的疲劳评估 |
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| 引用本文： | 周太全,郭力,陈鸿天.香港青马大桥在交通荷载作用下的疲劳评估[J].地震工程与工程振动,2002,22(5):24-29. |
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| 作者姓名： | 周太全 郭力 陈鸿天 |
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| 作者单位： | 1. 东南大学土木工程学院,江苏,南京,210096
2. 香港理工大学土木及结构工程系,香港,九龙 |
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| 基金项目： | 国家自然科学基金 (No .5 0 1780 19)，香港特区政府研究资助局资助项目 (RGC :B .31.37.Q5 14 ) |
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| 摘 要： | 在全桥三维有限元模型基础上 ,进行了车载响应分析 ,得到全桥的动力响应 ,并与实测结果进行了分析对比 ;对疲劳危险部位建立局部有限元模型 ,并进行了局部应力分析。在结构健康安全监测系统实测数据基础上 ,得到应变循环标准块 ,用基于热点应力疲劳评估方法对危险部位进行了疲劳寿命评估。
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| 关 键 词： | 疲劳 有限元 局部模型 热点应力 寿命评估 |
| 文章编号： | 1000-1301(2002)05-0024-06 |
| 修稿时间： | 2002年7月28日 |
Fatigue evaluation of Tsing-Ma bridge subjected to traffic loading |
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| ZHOU Tai-quan ,GUO Li ,CHAN Hung-ting.Fatigue evaluation of Tsing-Ma bridge subjected to traffic loading[J].Earthquake Engineering and Engineering Vibration,2002,22(5):24-29. |
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| Authors: | ZHOU Tai-quan GUO Li CHAN Hung-ting |
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| Institution: | ZHOU Tai-quan 1,GUO Li 1,CHAN Hung-ting 2 |
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| Abstract: | By using a three dimensional FEM model of Tsing-Ma Bridge, the dynamic response to traffic loading is analyzed and the global response of bridge is obtained. The comparison is made between the calculation results and the measured values. The local FEM model is developed to analyse the critical fatigue damage region and the stress concentration factor for critical region is obtained to get the hot spot stress around the weld toe. Based on the structural online health and safety online monitoring system, the representative block of cycles repeated everyday can be obtained. With the S-N curve based on hot spot stress approach, the fatigue life evaluation is made for the Tsing-Ma Bridge ,which gives information for the bridge health monitoring system. |
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| Keywords: | fatigue finite element method local analysis hot spot stress fatigue life evaluation |
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