| 铁路运营重载货车后既有钢桥疲劳寿命评估 |
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| 引用本文： | 王丽,张玉玲,赵欣欣,崔鑫. 铁路运营重载货车后既有钢桥疲劳寿命评估[J]. 钢结构, 2013, 28(4): 15-19 |
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| 作者姓名： | 王丽 张玉玲 赵欣欣 崔鑫 |
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| 作者单位： | 中国铁道科学研究院铁道建筑研究所,北京,100081 |
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| 摘 要： | 针对我国铁路对重载运输的需求,对铁路货车轴重提高至270kN时,不同年运量等级下跨度64m下承式钢桁梁的疲劳寿命进行评估。基于当前的典型疲劳列车,通过替换重载货车的办法,制订270kN轴重疲劳列车;采用大型计算软件STAAD/PRO进行建模分析,得到重载疲劳列车经过桥梁时各关键构造细节的应力历程;采用自编雨流程序,得到相应应力频谱;根据Miner线性累积损伤法则,计算得到不同年运量条件下,桥梁各关键构造细节的剩余疲劳寿命。
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| 关 键 词： | 重载 既有钢桥 疲劳 剩余寿命 |
FATIGUE LIFE EVALUATION OF EXISTED STEEL BRIDGE AFTER HEAVY HAUL TRAIN WORKING ON RAILWAYS |
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| Wang Li , Zhang Yuling , Zhao Xinxin , Cui Xin. FATIGUE LIFE EVALUATION OF EXISTED STEEL BRIDGE AFTER HEAVY HAUL TRAIN WORKING ON RAILWAYS[J]. Steel Construction, 2013, 28(4): 15-19 |
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| Authors: | Wang Li Zhang Yuling Zhao Xinxin Cui Xin |
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| Affiliation: | Wang Li Zhang Yuling Zhao Xinxin Cui Xin ( Railway Engineering Research Institute , China Academy of Railway Science , Beijing 100081 , China ) |
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| Abstract: | According to the demand of the heavy haul transportation of the railway in China , the fatigue life of 64m span steel truss bridge is evaluated on different grades of annual transportation weight when 270kN axle weight trains are operated on railways.On the basis of actual fatigue train , 270kN axle weight fatigue trains are established by means of replacing the existed car.STAAD / PRO is used to establish the bridge model , and then the stress course is obtained.Rain flow program is used to obtain the stress spectrum.Miner linear cumulation damage principle is used to obtain the residual life of the key detail of the bridge. |
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| Keywords: | heavy haul existed steel bridge fatigue residual life |
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