m KhanMohhamadi - assistant professor college of engineering university of tehran
H. Behnam - M.Sc in earthquake engineering university of tehran

because of the mutiaxial nature of ground shaking under seismic force , walls will be subjected to simultaneous vertical in-plane and out of plane face load response. While the inplane IP response will primarily be a result of the resistance of the wall to inertia force from other parts of the structure , such as floor masses the out of plane OOP response will be due to the inertia mass of the walls themselves responding to the floor level excitation.

in-plane, out-of-plane,interaction , rocking , masonry