Delmarva_Struct
Structural
I am designing the foundations for a large precast concrete structures that is Seismic Design Category D. I have received the lateral loads from the precast designers from a separate analysis of the superstructure considering fixed based approach. The lateral loads are large and in designing the wall strip footing, these loads are causing sliding of the foundations. I am having to increase the size of footing to a very large degree to avoid sliding. Is there any other way of resisting lateral sliding other than friction between soil and footing and the lateral bearing capacity of soil? Please note that all shear forces are in-plane of the wall. I did consider shear keys similar to retaining walls going across the footing but i have never seen this done before. Structure is a single story shear wall structure aka the shear walls are the gravity and lateral load bearing members. Walls are connected to other adjacent walls and the footings would be connected as well. I assume the connection to adjacent footing would offer some sliding resistance but I'm not sure how much...