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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 19 Abstracts search results
Document:
SP205-03
Date:
January 1, 2002
Author(s):
F. Ragueneau and J. Mazars
Publication:
Symposium Papers
Volume:
205
Abstract:
This paper deals with the analysis of reinforced concrete structures subjected to seismic loading. The expressions of two constitutive relations based on damage mechanics are exposed. Physical behavior such as crack closure and frictional sliding are introduced at the local level and their influences towards structural computations (global damping) are exemplified by comparisons with experimental data.
DOI:
10.14359/11633
SP205
Editors: Kaspar William and Tada-aki Tanabe
SP-205 Nonlinear finite element analysis (NLFEA) of reinforced concrete is close to being a practical tool for everyday use by design engineers. The first in this collection of 18 papers takes a critical look at the accuracy of this analysis procedure, then identifies and discusses reasons for caution in applying nonlinear analysis methods. Subsequent papers cover topics that include: * Seismic behavior predictions of structures; * Three-dimensional cyclic analysis of compressive diagonal shear failure; * Finite element analysis of shear columns; and * Simulation strategies to predict seismic response of reinforced concrete structures. Designers and researchers who use NLFEA models and procedures for reinforced concrete must be experienced and cautious. The papers in this volume will enable the users to better understand modeling, analysis, and interpretation of results.
10.14359/14013
SP205-17
C. Meyer
When designing concrete structures, fatigue related problems are not among the first that come to mind. However, structures subjected to strong cyclic loads such as those associated with destructive earthquakes experience strength and stiffness degradation that are most aptly described as a low-cycle fatigue phenomenon and are related to the damage accumulated under such loading. This paper briefly discusses the various elements of a rational, i.e. mechanics-based design methodology. Results of an experimental test program are summarized, in which 4-inch cubes with or without fiber reinforcement are subjected to uni- and biaxial cyclic compression until failure. The review concludes with a brief review of the various aspects of material behavior that need to be modeled, if the response of reinforced concrete members is to be simulated numerically.
10.14359/11647
SP205-02
R. K. Dowell and F. Seible
The paper presents the UCSD reinforced concrete shear columns, and measured test results, which participants have been invited to model as part of a benchmark analysis. Both as-built and seismically retrofitted column results are presented. The columns were l/3-scale, rectangular bridge columns that were loaded in double bending which produces twice the shear force demand of an equivalent cantilever column. While the shear force capacity of the as-built columns was essentially the same, the shear force demand was different for each of the columns due to the use of Grade 40 and Grade 60 vertical steel and due to the different column heights. This resulted in one column failing in a brittle shear manner prior to reaching nominal moment and ductility 1, another failing at displacement ductility 1.5 and the third failing at displacement ductility 3. The challenges to the participants of the benchmark analysis are to capture the peak shear force at failure and post-peak force-deformation behavior for the three as-built columns. In the paper a discussion is presented regarding difficulties with modeling and testing reinforced concrete structures.
10.14359/11632
SP205-10
T.-S. Han, S. 1. Billington, and A. R. lngraffea
Seismic analyses of reinforced concrete structures are performed using the finite element method. A shake table test of a lightly reinforced concrete three story frame building and a shake table test of a seismically designed shear wall are simulated. The effects of modeling boundary conditions and of considering the initial micro-cracking of concrete on natural frequency change are investigated. These parameters are used to calibrate finite element models to experimental models. The simulations predict the overall seismic behavior of reinforced concrete structures. However, the analyses of both structures showed that accuracy of material degradation is lacking and the computational efficiency of such models needs improvement for large-scale seismic analyses.
10.14359/11640
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