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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
August 1, 1980
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.
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.
Y. C. Wong and A. Coull
An influence coefficient method is presented for the analysis of the interaction between laterally loaded walls, of different cross-sectional shapes, and their connecting floor slabs. The results have been tested for both convergence and accuracy against those obtained by the finite element and finite difference technique. The method yields accurate results for both slab stiffness and stresses, with a considerable saving in computer time over the other theoretical analyses.
Maw S. Sheu and Neil M. Hawkins
A grid model is developed that predicts the strength and stiffness of slab-interior column connections transferring moments increased either monotonically or reversed cyclically to failure. A study is made of the effects of bond slip on joint behavior and those results used to define boundary conditions for the grid model. General principles are also developed for evaluating changes in flexural and torsional stiffness with cyclic loading. Results predicted by the model are compared to experimental results and good agreement obtained for both monotonic and reversed cyclic loading.
A. H. Chowdhury and R. N. White
Two three-story, two-bay l/10 scale reinforced concrete model frame structures were subjected to combined gravity and lateral loads. One frame was subjected to unidirectional lateral loading, and the second was loaded with gradually increasing reversing lateral loads; loads were increased to failure in both cases. Distribution of lateral loads was in accordance with the SEAOC requirements for seismic design; steel reinforcement was also designed to conform to these requirements. A nonlinear, incremental stiffness analysis approach was developed for uni-directional loading and was applied to the experimental frame and to a single bay portal frame reported in the literature. Stiffness reduction of the frame subjected to reversing lateral loads was not more severe than that for the unidirectionally loaded frame at loads less than about 80% of the ultimate lateral load capacity of the frame. There was minor reduction in strength and stiffness caused by cycling at higher load levels. Ductility requirements were met by the frames, and no adverse shear-induced effects were observed in the joint regions of the frames. The analytical method gave excellent predictions of frame deformations.
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