Computational Method for Prestress Developing of Tensile Cable-Net Structures  

作　　者：赵俊钊 陈务军 付功义 

机构地区：[1]Space Structures Research Centre,Shanghai Jiaotong University

出　　处：《Journal of Shanghai Jiaotong university(Science)》2013年第2期197-204,共8页上海交通大学学报（英文版）

基　　金：the National Natural Science Foundation of China (Nos. 50878128 and 51278299)

摘　　要：The prestress developing of tensile cable-net structures is a state transforming process from the initial unstressed state to the final prestressed state, and it is rather complicated because the elastic deformation is normally coupled with the kinematic mechanism movement. Firstly, the basic equations of prestress developing by moving boundary joint are derived from the total potential energy equation. Secondly, the presumed initial tension is proposed to impose into the elements and avoid the singularity of global stiffness matrix. And the self-stress mode which is calculated from the equilibrium matrix with singular vMue decomposition is employed as basically presumed initial tension. By applying boundary movement increment, an iterative computation is developed to calculate the updating geometric configuration and tension evolution. Finally, the MATLAB program is coded from the presented method, and numerical examples indicate that this computational method is effective and has theoretical significance and valuable guide to design and construction of tensile cable-net structure.The prestress developing of tensile cable-net structures is a state transforming process from the initial unstressed state to the final prestressed state, and it is rather complicated because the elastic deformation is normally coupled with the kinematic mechanism movement. Firstly, the basic equations of prestress developing by moving boundary joint are derived from the total potential energy equation. Secondly, the presumed initial tension is proposed to impose into the elements and avoid the singularity of global stiffness matrix. And the self-stress mode which is calculated from the equilibrium matrix with singular value decomposition is employed as basically presumed initial tension. By applying boundary movement increment, an iterative computation is developed to calculate the updating geometric configuration and tension evolution. Finally, the MATLAB program is coded from the presented method, and numerical examples indicate that this computational method is effective and has theoretical significance and valuable guide to design and construction of tensile cable-net structure.

关 键 词：tensile cable-net structures prestress developing presumed initial tension self-stress mode  singular value decomposition 

分 类 号：TU351.01[建筑科学—结构工程] TP393[自动化与计算机技术—计算机应用技术]