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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:
SP63-03
Date:
August 1, 1980
Author(s):
Jun Yamazaki and Neil M. Hawkins
Publication:
Symposium Papers
Volume:
63
Abstract:
Results are reported of the correlation between finite element predictions of the strength and behavior of flat slab to interior column connections transferring moment and response observed in tests on such connections. Predictions of the elastic response of the connections were made using a general elasticity program and a plate bending program. Although the general elasticity program considered shear deformations, it did not provide a markedly better correlation with the test data than the plate bending program. The plate bending analysis was extended into the inelastic range using an incremental procedure that recognized variations in stiffness and yielding of the slab with the directions of the reinforcement and principal moments. While the measured strains in the reinforcement and concrete were in reasonable agreement with the predictions, the measured deflections were about twice the predicted deflections. That discrepancy was found to be caused by bond slip of the reinforcement passing through the column and the inability of the program to correctly assess the torsional cracked section stiffness of reinforced concrete.
DOI:
10.14359/6646
SP63-04
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.
10.14359/6647
SP63-05
A. L. Unemori, J. M. Roesset, and J. M. Becker
The effect of the flexibility of the floor slabs on the seismic response of crosswall buildings was investigated both for the case of a uniform base motion (normal assumption) and for the case of an earthquake motion travelling horizontally with a finite velocity of propagation. A series of parametric studies were conducted, the results indicate that the slab flexibility should be taken into account when dealing with relatively short buildings, with five or less stories, and in the first few floors of all buildings of the type studied when there are important torsional effects induced by a nonuniform ground excitation.
10.14359/6648
SP63-06
Haluk M. Aktan and Robert D. Hanson
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.
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
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