SIMPLIFIED FE MODEL OF PARTIALLY-RESTRAINED STEEL FRAME WITH RC INFILL WALLS

A simple inclined strip model for analyzing the hysteretic behavior of partially-restrained steel frame with reinforced concrete walls (PSRCW) is presented. The axial force vs displacement of inclined strip is derived according to the constitutive relationship of concrete, and the hysteretic rules of inclined strips is determined through multi-linear plastic pivot of non-linear link element. The main parameters of PSRCW are analyzed, including mechanical model, quantity and inclined angles of strips. The results demonstrate that multi-linear plastic pivot can be used to simulate the hysteretic behavior of inclined strip, and more than seven strips and an inclined strip angle of 40-50 degree are suggested. The comparison between the results of calculation and those of corresponding tests shows good agreement.