Theory and application of construction process analysis for bidirectional cable-stayed spatial truss structure

Based on the nonlinear finite element theory of link and beam element and the tension model of cables,the numerical computation theory and method for construction process simulation of bidirectional cable-stayed spatial truss structures were presented and the software system was developed on the basis of AutoCAD software.This software system can simulate the whole construction process of structures considering the variation of structural system,construction load,boundary condition and even pretension in cables.Comparison with the results of general finite element method demonstrated that the results of the proposed method were accurate enough for engineering,and comparison with the spot monitoring test results verified that the proposed theory and method can well simulate the real characteristic of structures in the construction process,which can help to provide a theoretical direction for design and optimization of structural construction scheme.