Circular Arch Element on Elastical Ground Considering Both Normal And Tangential Resisting Forces

The exact 6 x 6 stiffness matrix for a circular arch on elastical ground,considering both normal and langential resisting forces, derived from the governing differential eouations and from the relationship between the member foeces and the displacements,is pres ented.This element can be applied to the analysis of the underground- structures whose cross sections contain cirulary curved memberes.