Effects of infill walls on load resistance of multi-story RC frames to mitigate progressive collapse

To study the effects of infill wall on progressive collapse resistance reinforced concrete (RC) frames with slabs, a macro finite element (FE) model was built using general purpose software OpenSees. The FE validated by existing test results. Then, subsequently used to predict potential eight-story RC frame including slabs and walls. numerical studies demonstrated that inclusion walls could increase ultimate load initial stiffness 70% 169%, respectively, compared bare frame. not only changed resisting path but also effectively improved redistribution ability evaluate reliability two-story sub-structure investigate behavior multi-story building, each story building in case column missing is compared. It found similar, except first story. Finally, series parameter were carried out quantify opening ratio, thickness compressive strength performance