空间异型钢管相贯节点的理论与试验研究（可复制毕业论文）.pdf

华中科技大学
硕士学位论文
空间异型钢管相贯节点的理论与试验研究
姓名:陈金凤
申请学位级别:硕士
专业:结构工程
指导教师:熊世树
20050416
摘要
钢管结构具有外形美观,结构轻巧,设计概念合理等优点,在国内外结构工程中
应用越来越广。近年来,跨度大、造型新颖的钢管结构中的相贯节点形状复杂,现行
钢结构规范还不能完全解决此类节点的设计问题。所以,进一步研究该类相贯节点的
静力工作性能并提出可行的方法来指导工程实践具有重要的意义。本文以华中科技大
学体育中心为工程背景,采用有限元方法和试验方法对其屋面钢结构中受力复杂的异
型钢管相贯节点进行了全面的研究,为设计提供依据。
本文首先对钢管相贯节点的研究情况进行了系统的总结与分析,详细介绍了试验
和理论研究情况。接着,基于理想弹塑性材料、大挠度小应变变形特征及法线变形后
仍为直线等假设,采用 Newton-Raphson 增量迭代方法以及位移收敛准则进行方程
求解,为复杂相贯节点的计算提供了一种方法。
基于上述非线性有限元法的原理,采用通用有限元程序 ANSYS 和材料性能试验
结果,采用四结点弹塑性壳单元(shell143)建立有限元模型,对该异型钢管相贯节
点进行了非线性有限元分析。研究了该节点应力发展和节点变形等受力性能,并得出
了节点的极限承载力。
最后,对该异型节点进行足尺试验,并将试验结果与有限元分析结果进行对比分
析,验证了有限元分析结果的准确性和计算方法的可行性。
本文异型相贯节点的分析方法和试验结果,对于类似工程结构具有重要参考价
值。


关键词:钢管相贯节点非线性分析极限承载力足尺试验

I
Abstract
With the advantages of beauty, lightness and rational design concepts, steel tubular
structures have got a wide application in China now. These years, with the development of
steel structures, the size of steel tubular joints applied in big-span steel structures e
larger and plex. However, the code can not figure out these design problems
absolutely. It makes good sense to launch a research of the properties of the steel tubular
joints and find a study method in order to throw light on practical projects. In this paper,
the project of the stadium is considered which is built in Huazhong University of Science
and Technology. Comprehensive researches for the steel tubular joint used in the stadium
steel roof are conducted by using the finite element method and full scale test. The research
results provide warranty for design.
To begin with, systemic summarizations and analysis are given about the static
performances of steel tubular joints. Experiments and theories of steel tubular joints are
introduced. Then, an ideal elastic-plastic material is assumed, along with the material and
geometry being considered nonlinear, the Newton-Raphson increment iterative method and
displacement convergence criterio