Numerical modelling of the mechanical behaviour of steel brace modied by CFRP sheet

One of the deficiencies of diagonal (x) bracing is buckling under compressive load, hence not reaching the yielding threshold and being unstable. in this numerical study, the behavior of x-shape brace was investigated, which was modified by carbon fiber reinforced polymer (cfrp) plates that could absorb compressive force and make it stable. this innovative brace consisted of two separate steel plates connected by cfrp sheets to each other in the middle of the compressive element. thus, these two parts were connected by epoxy resin and bolts. in this study, finite element method (f.e.m.) was used to simulate the elements of steel and fiber polymers by abaqus software under cycle loading after designing of fiber layers and connection type. also, the numerical result was compared with the normal steel brace. the result showed that the innovative brace had more efficiency under seismic response. according to this output, ductility and energy absorption increased in the innovative model (cfrp-br), but stiffness decreased as compared with the normal steel brace.