Construction process internal forces and displacements superimposed analysis method and application

It was incorrect to take a practical space grid structures as the model for mechanics analysis, although this method was popularly used for design at present, because the structural internal forces and displacements at the end of construction do not relate to the construction method as well as the process, Classical finite element method do not come up with an analysis method and formula to solve this problem. An analysis method, the construction process internal forces and displacements superimposed analysis method, which improves the classical finite element method and considers the construction method and process, was proposed as a construction analysis method for space grid structures. The member internal forces, joint displacements and restraint forces of the space grid structures in every stage of construction can be calculated by this analysis method. By means of this analysis method, the calculation results of a barrel vault erected by slide construction method are more accurate than those by the popular analysis method.