索桿張拉結構是由索、桿組成的空間柔性結構,有自重輕、跨度大、造型豐富等特點。張拉過程同時存在剛體位移和變形,是一個結構和機構耦合的高度幾何非線性的力學問題,傳統有限元素法分析時需要迭代,系統勁度矩陣奇異更會出現難以處理的窘境。此外部份構件最大內力出現在張拉過程而非設計狀態,因此需要進行施工模擬,了解施工過程結構形態變化和構件內力響應規律。本文主要利用向量式有限元素法,以階段性施工的方式,對索桿張拉結構中的纜索、簡易索桿複合結構進行模擬分析,確定其正確性及可行性。
Cable-Strut Tensile Structures is a flexible structure system. It has the advantages of light weight, large spanning and rich modeling. It has a rigid body motion and deformation when proceed the simulate analysis. It is geometric nonlinear mechanical problems of structure and mechanism. It need iteration to get the nonlinear equations when using Finite Element Method to analyze, will be difficult to analysis. Cable will have maximum of tension when during the process of Cable-Strut Tensile Structures. So, need doing proceed the simulate analysis to know the stress-strain relationship of structures. According to the Vector Form Intrinsic Finite Element Method, we will employ step by step with construction stage and proceed the simulate analysis to make sure the correctness from cable and Cable-Strut Tensile Structures.