Optimized Design of Anti-fatigue for Orthotropic Steel Bridge Deck
Optimized Design of Anti-fatigue for Orthotropic Steel Bridge Deck
复制标题
正交异性钢桥面板抗疲劳优化设计
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Meng Fan
中科院分区：
文献类型：
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作者：
Meng Fan
由于正交异性钢桥面结构的复杂性和相应的力学特性，疲劳问题一直是桥面结构的重要问题之一。总结了其疲劳易损件，并对其损伤机理进行了研究。以港珠澳大桥钢箱梁为研究对象，结合全尺寸疲劳试验，建立参数化有限元模型。研究了单参数解的灵敏度和多参数解的比较。研究了3个疲劳敏感点的应力幅值。结果表明，不同的结构参数对疲劳细部应力幅值有不同程度的影响。适当增加顶板和横隔板的厚度，减小横隔板的间距是有益的。港珠澳大桥正交各向异性钢桥面设计合理。
Fatigue is one of the most important problems for steel orthotropic bridge deck because of the complexity of structure and corresponding mechanical characteristics.Its consumable parts of fatigue are summarized and damage mechanism is studied.The steel box girder of the Hong Kong-Zhuhai-Macao Bridge is taken as study subject,and combining the full-scale fatigue test,parameterized finite element models are established.The sensitivity of single-parameter and comparison of multi-parameter solution are studied.The stress amplitudes of 3vulnerable details of fatigue are studied.The results indicate that various structural parameters have different degrees of influence for the stress amplitudes of fatigue details.It is beneficial to appropriately increase the thickness of the top deck and the diaphragm and reduce the space of the diaphragm.The design of orthotropic steel decks of Hong Kong-Zhuhai-Macao Bridge is reasonable.