Calculation and Application of Equivalent Nodal Load on Damaged Beam Element

Abstract:

An analysis was made of the correlative limitation of traditional stiffness method.Based on the finite element flexibility method theory,a new calculation method for the equivalent nodal load of the damaged beam element was proposed by introducing the sectional secant-flexibility,which was compatible with conventional nonlinear structural-analysis because an iteration was not required.A static and nonlinear overall-analysis was also made for a renforced concrete frame structure with a self-development software.A case study shows that by taking the structural damage into consideration,nonlinear structural-analysis improves in terms of its efficiency,convergence and stability with the equivalent nodal load method.