【作者】 林彦；

【导师】 刘锡良；

【作者基本信息】 天津大学 ， 结构工程， 2004， 硕士

【摘要】 为了适应铸钢节点的快速发展，本文首次对该类型节点进行了系统研究。通过对实际工程中采用的铸钢节点的分析，本文讨论了铸钢节点的分类与特性；介绍了节点的生产工艺；提出了节点的一般设计准则。以弹塑性分析为基础，运用非线性有限元分析方法，分析了几十种不同规格的铸钢空心球管节点单向拉压状态下的受力特性，得到了节点的应力分布规律与拉压破坏模式，揭示了影响节点承载力的主要因素，并建立了节点的设计承载力公式。通过对重庆奥林匹克体育中心工程中的铸钢空心球管节点空间受力下的有限元分析，得到了节点空间受力的应力分布规律，并将其与单向受力下的应力分布进行比较，两者应力分布特点基本相同。除此之外，还对工程中采用的铸钢相贯节点进行了有限元计算，分析了节点的应力分布情况。以有限元分析为基础，对重庆奥体工程中受力较大的铸钢空心球管节点与铸钢相贯节点进行了足尺试验研究，得到了最大设计荷载作用下的节点表面应力分布情况，并与有限元计算结果进行比较，二者符合较好，从而验证了节点有限元分析的正确性，为今后对铸钢节点的理论研究提供可靠依据。最后，本文还对铸钢节点有待进一步研究的问题提出了几点建议。本文的研究结果可为我国即将编制的铸钢节点规范提供可资的参考资料。更多还原

【Abstract】 In order to suit the quick development of cast steel joints, the systematic researchis carried out in this paper. By analysis of the cast steel joints in structure, theproperties and classification are discussed, the design criteria are presented and theproduction technique of the joints is introduced. Based on the elastic-plastic analysistheory, the static behavior is studied of cast steel hollow spherical joints with tubeunder tension and compression by the use of nonlinear FEM.. Stress distribution,destructive model and influence of joint geometric parameters on joint strength areanalyzed. The bearing-capacity formula of the joints is also presented. Next, the stressdistribution is discussed of cast steel hollow spherical joints with tube underthree-dimension load for Chongqing Olympic stadium by using FEM. Thecomparison of the static behavior under two different load case shows that both of thestress distribution matches each other well. In addition, FEM analysis is alsoperformed to compute the stress on the cast steel tubular joints in Chongqing Olympicstadium. On the basis of the computation, the full-scale loading test on cast steel jointswith large size in Chongqing Olympic stadium is performed. By the measurement, thestress on the surface of the two cast steel joints under maximum design load areobtained. Combined the test and computation, the result shows that both of the valuesmatch each other very well, which can prove the computation right and providereliable basis for the research of cast steel joints in the future. At last, somesuggestions are presented about the further research problem of cast steel joints. Theresearch in the paper is helpful to compile code in China.更多还原