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以大型钢桁架悬索桥为实例,研究钢桁架加劲梁悬索桥节点处以不同的刚度连接,对桥梁的受力性能影响,对2组具有不同节点刚度的模型,进行了空间有限元计算。分析结果表明:节点连接刚度大小对桥面线形、主缆、吊索拉力分布以及杆件轴力影响很不明显,但对杆件应力分布影响显著,设计时应加以考虑。并根据计算结果提出了同类结构的设计和施工建议。
Taking the large steel truss suspension bridge as an example, the connection of the steel truss stiffened beam suspension bridge with different stiffness is studied, and the effect of the bridge on the force performance is studied. The finite element method is used to calculate the two groups of models with different joint stiffness. The analysis results show that the stiffness of bridge joints has little effect on the linear shape of bridge deck, the distribution of main cables, the tension distribution of slings and the axial force of bars. However, the influence on the stress distribution of bars is significant and should be considered in design. According to the calculation result, the design and construction suggestion of similar structure are put forward.