การหา Governing Equations ของ Ribbed Slabs โดย Variational Principle

Abstract

A rational analysis of ribbed slabs is carried out by a variational principle. Starting from strain-displacement relations, being derived from certain basic assumptions, and the virtual work principle, the equilibrium equations and a set of natural boundary conditions are obtained. Finally, substituting the stress resultant-displacement relations into the equilibrium equations leads to the governing differential equations.