Methods for determining the stiffness of planar stressed and frame reinforced concrete composite structures under seismic actions
Two variants of determining the stiffness of structures and floors of buildings and facilities consisting of reinforced concrete planar stressed and frame elements with cracks are considered. A new variant of simulating the formation of inclined cracks with their designed parameters in planar and frame reinforced concrete composite structures under seismic impacts is proposed. On its base an alternative method of single vertical strips for determining the stiffness of reinforced concrete structures in areas with inclined cracks is presented; it comes to the scheme of a compound rod for determining the stiffness of reinforced concrete structures in areas with inclined cracks.