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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 25 Abstracts search results
Document:
SP63-06
Date:
August 1, 1980
Author(s):
Haluk M. Aktan and Robert D. Hanson
Publication:
Symposium Papers
Volume:
63
Abstract:
A finite element model which separately describes the linear and the nonlinear propertiesof steel and concrete materials is developed to analyze the cyclic inelastic behavior of a reinforced concrete plane stress shear wall. The reinforced concrete plane stress element is divided into subregions. The linear behavior of each subregion is defined by an elastic plane stress element and the nonlinear behavior is provided by a joint element of zero initial width connected to a boundary of the subregion. The stiffness matrix of the combined plane stress and joint elements is obtained from the individual material properties of concrete and orthogonally placed reinforcing steel. Four hysteretic stress-strain relationships are developed for the concrete and reinforcing steel. One model defines the cyclicbehavior of concrete under normal stresses, a second model defines the cyclic concrete shear behavior in the uncracked state and after cracking, a third model defines the cyclic behavior of reinforcing steel by a simple bi-linear model, and a fourth model defines reinforcing steel buckling in compression after crushing of concrete. The applicability of the model is demonstrated by comparing analytical solutions with experimental results obtained by PCA on two slender shear walls.
DOI:
10.14359/6649
SP63-07
H. Sucuoglu and A. E. Aktan
An analytical procedure to generate reinforced concrete plane frame response to reversing static loading is developed. Yield is permitted to occur and spread to crossections which are not predetermined. Response of a 3 story 2 bay frame under reversed lateral load is investigated with particular reference to locations that yield, propagation of yield, beam and column behavior and collapse. To permit the structure prescribe its locations of inelasticity rather than predetermining these regions was observed to be a significant aspect in mathematical modelling.
10.14359/6650
SP63-08
M. lqbal and A. T. Derecho
This paper presents briefly the methodology and summarizes the results of ananalytical investigation of the dynamic inelastic response of isolated reinforced concrete structural walls to earthquake motions. Considered in particular is the distribution of inertial forces along the height of the struc-ture. Results of the analyses are compared with the design force distributions specified by the Uniform Building Code (UBC) and Applied Technology Council (ATC). Suggested modifications to the code force distributions, as these apply to isolated structural walls, are presented.
10.14359/6651
SP63-09
A. E. Long and D. W. Kirk
The results of lateral load tests on one third scale slab-column structures with realistic boundary conditions are presented. Measured moments at both internal and edge columns are compared with predictions based on methods in codes and other analytical procedures including finite elements. For all methods of prediction the lateral stiffness of the frameworks is overestimated and in some cases to a substantial extent. The lateral stiffness was also found to be influenced by cracking due to gravity loading.
10.14359/6652
SP63-10
A. E. Cardenas, H. G. Russell, and W. G. Corley
The results of an experimental investigation to determine strength of rectangular low-rise structural walls for buildings are presented in this report. Seven large specimens with "height-to-hori-zontal- length" ratios of 1.0 were subjected to static in-plane horizontal loads. One of the specimens was subjected to ten cycles of load reversals. Variables in the test program were amount and distribution ofvertical and horizontal reinforcement. The walls did not have any boundary elements or special hoop reinforcement. No vertical load was applied. Results indicate that low-rise rectangular walls can develop shear stresses on the order of 10 f'c psi (0.83 f'c MPa). Also, results indicate that shear strengths implied by Section 11.10, Special Provisions for Walls, of the 1977 ACI Building Code provide a reasonable lower bound capacity, even when load reversals are applied.
10.14359/6653
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