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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 12 Abstracts search results
Document:
SP73-11
Date:
March 1, 1982
Author(s):
Harry G. Harris and George Jau-Jyh Wang
Publication:
Symposium Papers
Volume:
73
Abstract:
This paper presents a methodology for designing, fabricating, and testing small-scale dynamic models of precast concrete shearwalls originating in the construction of large panel precast concrete buildings. Design and construction of a set of 3/32-scale models which satisfy dynamic similitude is presented. Resonent vibration testing of three-story and five-story precast concrete shearwall models on a small shake table is described. Additional monotonic and cyclic tests on six five-story shearwall models under simulated earthquake loading are presented. The main parameters in these tests were the amount of steel in the vertical ties and cyclic versus monotonic loading.
DOI:
10.14359/6781
SP73-10
H.Faruk Karadogan,Le-Wu Lu, and Ti Huang
Small size models of two concrete floor systems have been tested for their elastic and post-elastic behavior under in-plane shear action. Parameters studied include cyclic and monotonic loading, shear span aspect ratio, effect of gravity load and repair by epoxy injection method. This report describes the development of the model and techniques used in the testing. Preliminary test results and conclusions are also presented.
10.14359/6780
SP73-09
Larsgunnar Nilsson and Sven Sahlin
An experimental and finite element analysis of the impact of a stel rod on a reinforced concrete slabl has been conduted. The object was to study the correlation between experimental and theoretical results. It was found that detailed information of nonlinear wave propagationm concrete crushing and cracking, and yielding of reinforcment steel could be obtained from the finite elem,ent analysis. A good coorelation between experimental and theoretical results was achieved. The development of different failure mechanisms can clearly be followed in the theoretical results. Such information should be very valuable in connection with the formulation of simple design formulas.
10.14359/6779
SP73-08
Alan J. Watson and John E. lnkester
The paper describes the behavior of a 1/8th scale model reinforced concrete beam to column joint under an impact load applied to the beam. The load is produced by a 1.68kg steel rod fired from an air gun with an impact velocity of either 8.9 m/s or 13.4 m/s. The column reactions were measured by foil electrical resistance strain gauges on 3 load cells. Similar strain gages gave the incident and reflected stress pulse from which the impact load on the beam has been obtained. The deflections of the beam during the impact were recorded using moving coil linear displacement transducers. The measured behaviour of the joint under impact load has been compared with that of identical specimens under static load and with calculated values.
10.14359/6778
SP73-07
James K. Gran, John R. Bruce, and James D. Colton
Two l/30-scale models of reinforced concrete cylindrical missile shelters were built and tested to study the response of buried reinforced concrete structures subjected to severe dynamic loads. To assess the applicability of small-scale modeling to this type of problem, the results of the l/30-scale model tests were compared with l/6-scale results from a parallel program. A comparison of the l/30-scale and l/6-scale tests shows that the surface loads and soil responses matched and that the structural responses agreed very well. For the elastic structures, concrete surface strains measured in the l/30-scale test and reinforcing steel strains measured in the l/6-scale test showed that the direct loading wave, the reflections from the base and the closure, the base and closure flexure, interface friction, and soil resistance to punchdown were all reproduced accurately at l/30-scale. For the inelastic structures, the responses agreed up to the time of failure of the l/6-scale structure. Failure in the l/6- scale structure occurred at an apparently locally weak section of concrete. Concrete surface strains measured in the l/30-scale test and reinforcing steel strains measured in the l/6-scale test showed excellent agreement above the failure location. The l/30 scale strains throughout the structure were also in excellent agreement with the predictions of numerical analyses.
10.14359/6777
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