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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:
SP63-13
Date:
August 1, 1980
Author(s):
M. S. Mirza
Publication:
Symposium Papers
Volume:
63
Abstract:
This paper presents the results of tests on three four-storey coupled shear wall specimens tested under an equivalent of monotonically increasing static upper triangular loading. Specimens No. 1 and No. 2 failed due to rupture of reinforcing steel in both walls after hinges had been formed at both ends of all coupling beams. An overall ductility factor of 14.2 was attained for both specimens while the ductility factors for rotation in the coupling beams and the shear walls were considerably higher. Specimen No. 3 also failed due to rupture of tension steel in the shear walls, however no hinges were formed in the coupling beams and the overall ductility ratio was only 5.7. Experimental results for Specimens No. 1 and No.2 were analysed using Paulay's elastoplastic analysis. The calculated ultimate strengths showed good agreement, however the calculated deflections were smaller than the experimental values. More research is needed in this area. The results of this investigation show that small-scale models can be used effectively in behavior studies of structural subsystems such as coupled shear walls, shear wall-frame structures, etc.
DOI:
10.14359/6656
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
SP63-19
Lawrence G. Selna and Wai K. Tso
A five story reinforced concrete building which collapsed during the Mindanao, Philippines Earthquake of August 1976 is studied. The building experienced a twisting motion dur-ing its collapse. The damages to the building are described, and design calculations which consider the twisting are performed. The calculation results show that a number of columns were understrength but that other factors such as reinforcement detailing and material quality influenced the seismic performance of the building.
10.14359/6662
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
SP63-23
A. Coull and S. A. Abu El Magd
A simplified method is presented for the analysis of laterally loaded wide-flanged shear wall structures with rigid or flexible joints between web and flange. The flange and web elements may be either of solid or framed construction, the latter being included by replacing the frame panel by an equivalent orthotropic plate in which the shear modulus is chosen to model the racking behaviour of the rigidly-jointed frame. The results obtained are compared both with theoretical values obtained by the finite element and frame methods, and with the results from a series of tests on small-scale plexiglass models. The method gives results which are sufficiently accurate for practical purposes, and enable the degree of shear lag in the flange, the effective width, and the lateral deflection to be estimated rapidly.
10.14359/6666
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