Title:
Plastic Collapse, Incremental Collapse, and Shakedown of Reinforced Concrete Structures
Author(s):
Sidney A. Guralnick and Abbes Yala
Publication:
Structural Journal
Volume:
95
Issue:
2
Appears on pages(s):
163-174
Keywords:
collapse mechanism; cyclic loading; ductility; elastic response;
energy absorption; incremental collapse; inelastic deformation;
plastic bending moment; plastic collapse; plastic hinge length;
plastic response; plastic rotation;
DOI:
10.14359/536
Date:
3/1/1998
Abstract:
The energy method previously developed to analyze the plastic collapse, incremental collapse and shakedown of elastic-perfectly plastic structures is extended in this investigation to treat corresponding phenomena in reinforced concrete structures. In this approach, plastic hinge rotations are used to redistribute the bending moments in the structure until a sufficient number of plastic hinges form to cause the structure to collapse as a mechanism. The plastic strain energy stored in the structure due to plastic hinge rotations is computed at each increment of the load and is used as a means to predict the type of collapse and the load causing collapse to occur. In this paper one example of a reinforced concrete structure is analyzed for plastic collapse, incremental collapse, and shakedown and the results of the analysis of a second structure are also given. The plastic strain energy absorbed by the structure at the formation of each plastic hinge is also computed at various load levels until overall plastic collapse of the structure occurs.