大跨径双层悬索桥钢桁梁整体焊接点疲劳分析与实验 = Fatigue analysis and test on integral welded joint at steel truss girder of long-span double deck suspension bridge
为了给大跨径钢桁梁悬索桥抗疲劳设计提供依据,针对杨泗港长江大桥钢桁梁采用的整体焊接节点,开展了多轴疲劳荷载作用下整体焊接节点的有限元疲劳分析和试验研究。首先通过建立全桥有限元模型,基于英国BS 5400规范和Miner准则,获得了在标准疲劳车作用下全桥最不利整体节点及其各杆件200万次等效疲劳轴力幅;其次建立最不利整体节点空间精细化模型,通过对各轴向杆件施加200万次等效疲劳轴力幅,进行了多轴荷载下整体节点的疲劳性能分析;最后基于相似理论,设计了1:6的整体焊接节点缩尺模型,进行多轴荷载下的疲劳试验研究。结果表明:位于距主塔297 m距离的F34节点为疲劳最不利下弦杆整体节点;F34节点最大V...
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Main Authors: | 邓晓光 Deng, Xiao-guang, 刘沐宇 Liu, Mu-yu, 史晶 Shi, Jing, 许浩槟 Xu, Hao-bing, 李华 Li, Hua |
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Other Authors: | School of Mechanical and Aerospace Engineering |
Format: | Article |
Language: | Chinese |
Published: |
2017
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Subjects: | |
Online Access: | https://hdl.handle.net/10356/85089 http://hdl.handle.net/10220/43651 http://zgglxb.chd.edu.cn/EN/Y2017/V30/I3/96 |
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Institution: | Nanyang Technological University |
Language: | Chinese |
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