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Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 25 Abstracts search results
Document:
SP63-01
Date:
August 1, 1980
Author(s):
Richard E. Klingner
Publication:
Symposium Papers
Volume:
63
Abstract:
Two approaches are discussed for mathematical modeling of the elastic and inelastic response of infilled frames. The first approach is based on idealizations of local behavior, while the second is based on observations of overall behavior. Both approaches are found to give good representations of nonlinear response. The second approach, based on the equivalent strut concept, is believed to be efficient for use in analyzing the response of complex, infilled frame structures.
DOI:
10.14359/6644
SP63-02
C. Llorente, J. M. Becker, and J. M. Roesset
This paper reports on preliminary results of research into the seismic response of large panel precast concrete construction typical of that used in the United States. Seismic . response is being modeled using finite element techniques and an explicit time step integration procedure. The seismic resisting elements of a crosswall system have been isolated to study the role the connection regions may have in seismic response. Results are presented that show the effects associated with rocking type motion and slpage in the horizontal connections of isolated crosswalls.
10.14359/6645
SP63-03
Jun Yamazaki and Neil M. Hawkins
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.
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
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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.
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