Comparison of Reinforced Concrete Models for Use in the Analysis of Extreme Loads

Conference · Thu Feb 28 23:00:00 EST 1991

OSTI ID:5744968

Dyrness, A. D. ^[1]; Julyk, J. L. ^[1]

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1. Westinghouse Hanford Co., Richland, WA (United States)

Extreme load analyses of concrete structures rely on the concrete constitutive model and the solution procedure to preserve solution accuracy throughout the analysis as well as to assure numerical stability In highly inelastic regimes. The application of existing finite-element software to extreme load analysis of reinforced-concrete structures is the focus of this paper. Two reinforced-concrete constitutive models, associated with commercially available software, are compared. One Is an internal material model contained in the general purpose finite-element program, A8AQUSe. The other (ANACAP-Ud) Is a concrete analysis package that provides a reinforced-concrete material subroutine (UMAT90*) linked to ABAQUS. Solution accuracy Is quantified by comparing the analysis predicted 'load-versus-dlsplacement' curves with experimental results for a two-way reinforced concrete slab with pinned supports and a concentrated load at Its center. Although other Investigators have had reasonable success correlating to experimental results, the range of the correlations has not challenged the convergence of the constitutive models under excessive tensile strain conditions. Parametric analyses documented herein assess the sensitivity of convergence to various parameters. These parameters include the application of the large displacement theory, solution procedures, strain hardening effects, rebar plasticity, and element type. The comparisons reported herein provide a basis for selecting a commercially available, reinforced-concrete material model and solution procedure for application to extreme load analyses.

• Research Organization: Westinghouse Hanford Co., Richland, WA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA); USDOE Office of Environmental Management (EM)
• DOE Contract Number: AC06-87RL10930
• OSTI ID: 5744968
• Report Number(s): WHC-SA--1010; CONF-910602--19; ON: DE91010108
• Country of Publication: United States
• Language: English

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