The Influence of Integral Rigidity on the Prevention of Progressive Collapse in the Frame Structure

In order to study the influence of integral rigidity on the prevention of progressive collapse in the frame structure,a method was proposed that the integral structure can be equivalent to the local structure,and finite element software-abaqus was used to build a frame structure to verify the validation of the method. And then the local model was used to analyze the effect of lateral stiffness and superstructure stiffness on the maximum resistance after the failure column was removed. The results show that with the change of lateral stiffness,the differences of maximum resistance are less than 3% and the maximum resistance are basically identical with the change of lateral stiffness. This indicates that the lateral stiffness and superstructure stiffness has little influence on the maximum resistance,which can be ignored. This can provide a simple and effective method for the research of progressive collapse resistance.