基于向量式有限元的大跨度钢结构施工力学分析方法

发布时间：2018-10-30 19:59

【摘要】：针对大跨度钢结构施工容易产生刚体位移等强烈非线性过程的特点,采用向量式有限元分析方法进行施工过程模拟.基于向量式有限元的基本理论,引入张拉索单元,通过控制张拉索单元的原长,实现大跨度预应力钢结构张拉全过程模拟;引入千斤顶单元,实现大跨度钢结构的脱架模拟.在此基础上,利用MATLAB语言编制了基于向量式有限元理论的施工过程分析程序,并通过悬臂梁拼装、索桁架张拉成形以及大跨度张弦桁架的张拉施工过程模拟分析,与传统分析方法进行比较,验证理论推导和自编程序的正确性与有效性.结果表明,采用基于向量式有限元的施工力学分析方法能够准确模拟结构拼装、预应力张拉成形和结构脱架等施工过程.
[Abstract]:In view of the strong nonlinear process of large span steel structure construction such as rigid body displacement, the vector finite element analysis method is used to simulate the construction process. Based on the basic theory of vector finite element, the cable element is introduced. By controlling the original length of the cable element, the whole process simulation of the long span prestressed steel structure is realized, and the delamination simulation of the long span steel structure is realized by introducing the Jack element. On this basis, the program of construction process analysis based on vector finite element theory is compiled by using MATLAB language, and the simulation analysis of construction process of long span Zhang Xian truss is carried out by means of cantilever beam assembly, cable truss tensioning forming and long span Zhang Xian truss construction. Compared with the traditional analysis method, the correctness and validity of the theoretical derivation and self-programming are verified. The results show that the construction mechanics analysis method based on the vector finite element method can accurately simulate the construction process such as structure assembly, prestress tensioning and structure delamination.
【作者单位】：东南大学混凝土及预应力混凝土教育部重点实验室;东南大学土木工程学院;
【基金】：国家自然科学基金资助项目(51308105)~~
【分类号】：TU758.11

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