| 组合桁架节点的试验及有限元分析 |
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| 摘 要： | 采用模拟试验及有限元方法,对某桁架斜拉桥中组合节点的力学性能进行分析。试验研究了此节点的安全裕度及适用性,模型缩尺比例为1:2.5。分析了应力分布、裂缝抵抗能力、锚栓剪切抵抗力,研究了节点的力学性能及传力途径。在荷载达到设计荷载的1.7倍前,钢板和混凝土弦杆的最大应变均在弹性范围内,说明这种结构有很好的安全裕度。基于试验结果,建立三维有限元模型,有限元分析的承载力和刚度计算结果与试验吻合较好。本分析为后续研究及组合桁架桥、组合节点的设计,提供了有价值的参考。
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| 关 键 词： | 组合节点 组合桁架 斜拉桥 模拟试验 有限元分析 |
Experimental Study and Numerical Analysis of a Composite Truss Joint |
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| Abstract: | This paper presents a model test and numerical finite element analysis(FEA) on the mechanical behavior of a composite joint in a truss cable-stayed bridge.The model test with the scale of 1:2.5 for the truss joint was conduct to fully understand the safety and serviceability.In the experiment,stress distribution,crack resistance ability and shear resistance of headed studs were carefully measured to investigate the mechanical performance,force transmission of the joint part.The maximum strain of the steel p... |
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| Keywords: | Composite joint Composite truss Cable-stayed bridge Model test Finite element analysis(FEA) |
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