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Nonlinear Analysis of a Reinforced Concrete Folded Plate Structure

by Pattabhi Sitaram, Univ of Missouri, Columbia, United States,
Stuart Swartz, (F.ASCE), Univ of Missouri, Columbia, United States,
Chidambaram Channakeshava, Univ of Missouri, Columbia, United States,



Document Type: Proceeding Paper

Part of: Spatial, Lattice and Tension Structures

Abstract:

This paper deals with the ultimate load analysis of a reinforced concrete (RC) folded plate shell subjected to dead load and monotonically increasing live loads, statically applied, using a nonlinear layered finite element technique. The nonlinear effects of concrete considered are cracking, tension stiffening, strain softening and aggregate interlock. A bilinear strain hardening model is used for steel reinforcement. Degenerate quadratic isoparametric 8-noded shell elements are employed using a layered discretization through the thickness. In order to obtain results which are independent of the choice of the finite element mesh, the tension softening behavior of the concrete is related to the fracture energy of concrete. A RC folded plate shell (inverted-U type) is analyzed and compared with available experimental results. The influence of fracture parameters on ultimate load and ductility are presented.

Subject Headings: Reinforced concrete | Structure reinforcement | Finite element method | Shell structures | Cracking | Concrete structures | Ultimate loads

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