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 23 Abstracts search results

Document: 

SP157

Date: 

October 1, 1995

Author(s):

Editors: Nigel Priestly, Michael P. Collins, and Frieder Seible

Publication:

Symposium Papers

Volume:

157

Abstract:

A total of 21 technical papers comprise this Special Publication which covers recent developments in lateral force transfer in buildings. Note: The individual papers are also available as .pdf downloads.. Please click on the following link to view the papers available, or call 248.848.3800 to order. SP157

DOI:

10.14359/14197


Document: 

SP157-02

Date: 

October 1, 1995

Author(s):

H. Aoyama

Publication:

Symposium Papers

Volume:

157

Abstract:

Summarized in this paper are the background state of the art in reinforced concrete beam-column joint design leading to the U. S.-N. Z.-Japan trilateral cooperative research, outline of the trilateral research, and its conclusions affecting the design practice in each country. Particular emphasis is placed on the transition of structural engineering research from empirical approach to rational approach which became apparent in the course of trilateral research and discussion.

DOI:

10.14359/979


Document: 

SP157-03

Date: 

October 1, 1995

Author(s):

J. O. Jirsa

Publication:

Symposium Papers

Volume:

157

Abstract:

Problems associated with design of beam-column joints for shear have been studied extensively in many countries. Work in New Zealand on the performance of joints in reinforced concrete moment resisting frames in seismic zones served to alert designers all over the world to consider these problems. Fundamental studies conducted by Paulay and his colleagues and students contributed immeasurably to our understanding of the behavior of joints. However, the approaches used in design codes have not always been the same as those used in New Zealand. The reasons for these differences have much to do with design philosophies, research objectives, and code development procedures. Shear problems at locations other than joints and in elements where rehabilitation (repair and strengthening) is needed to improve performance of structures under earthquake generated deformations still lack definition sufficient for developing code provisions.

DOI:

10.14359/980


Document: 

SP157-05

Date: 

October 1, 1995

Author(s):

O. Joh, Y. Goto, and T. Shibata

Publication:

Symposium Papers

Volume:

157

Abstract:

Based on the authors' previous tests, failure modes of beam bar anchorage with 90-degree bend used in reinforced concrete beam-column joints were classified into three types: a side split failure, a local compression failure, and a raking-out failure. To clarify the raking-out failure, the least understood of the modes, column type specimens with beam bars with 90-degree bend in the beam-column joints were tested under pullout loading at the bars. The specimen variables were development length, column depth, lateral reinforcement ratio, spacing between beam bars, and concrete compressive strength. From the test results, influence factors on the raking-out failure mode were discussed and an equation evaluating anchorage strength proposed.

DOI:

10.14359/981


Document: 

SP157-07

Date: 

October 1, 1995

Author(s):

R. C. Fenwick and B. J. Davidson

Publication:

Symposium Papers

Volume:

157

Abstract:

To survive a major earthquake, current practice requires seismic resistant frames to be designed to be ductile. To achieve the required level of ductility in multistory frames, the majority of the potential plastic hinge zones are located in the beams. The inelastic rotation, which may develop in these zones, arises predominately from the tensile yielding of the reinforcement. The associated compressive strains are small and, as a consequence, elongation occurs. Test results show that elongation on the order of two to four percent of the member depth develop in plastic hinge zones of beams subjected to cyclic loading before strength degradation occurs. The factors influencing elongation are reviewed in this paper. The results of a time history analysis, in which elongation effects are modeled, shows that this action, which is neglected in current design practice, has important implications for the detailing of columns and the design of supports for precast components and external cladding.

DOI:

10.14359/982


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