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International Concrete Abstracts Portal

Showing 1-5 of 13 Abstracts search results

Document: 

SP197

Date: 

April 1, 2002

Author(s):

Editors: Shamim A. Sheikh and Oguzhan Bayrak / Sponsored by: Joint ACI-ASCE Committee 352 and ACI Committee 374 and Joint ACI-ASCE Committee 441

Publication:

Symposium Papers

Volume:

197

Abstract:

Papers on behavior and design of concrete structures presented at this symposium include: “Recently Identified Aspects of Ductile Seismic Torsional Response of Reinforced Concrete Buildings,” “Shear Strength of Circular Reinforced Concrete Columns,” “Remembering the Column Analogy, New Seismic Design Provisions in Japan,” “Lessons from Recent Earthquakes in Turkey and Seismic Rehabilitation of Buildings,” “Strengthening Buildings for Earthquake Resistance with New Concrete,” “A Link Between Research and Practice: ACI 352 Recommendations for Design of Joints in RC Structures,” “Design of Confining Reinforcement in Columns for Seismic Performance,” “Aspects of Seismic Evaluation and Retrofit of Canadian Bridges,” and “Prediction of Strength and Shear Distortion.” 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. SP197

DOI:

10.14359/14014


Document: 

SP197-07

Date: 

April 1, 2002

Author(s):

J. 0. Jirsa

Publication:

Symposium Papers

Volume:

197

Abstract:

The mission of most AC1 technical committees is to develop and report information and a large number of missions include develop and maintain standards for use in design, construction, maintenance or other practice-related application. In general, the reports technical committees develop become prime sources of information in their assigned area. The objective of this paper is to document the formation of the committee and the development of the first report of AC1 352 Joints and Connections in Monolithic Concrete Structures published in 1976. The reports of AC1 352 have had considerable impact on the design and construction of concrete structures. The activities of AC1 352 provide a case study in the role of a committee in providing a vital link between research and practice. It seemed appropriate to discuss the work of AC1 352 at the Uzumeri Syposium because Mike Uzumeri served as a member of the committee. His research on the behavior of beam-column joints was an important part of the data on which the first report of AC1 352 was based.

DOI:

10.14359/11931


Document: 

SP197-12

Date: 

April 1, 2002

Author(s):

A. C. Heidebrecht and N. Naumoski

Publication:

Symposium Papers

Volume:

197

Abstract:

This paper describes an investigation into the seismic performance of a six storey moment resisting frame structure located in Vancouver and designed and detailed in accordance with the seismic provisions of the National Building Code of Canada (1995). Both pushover and dynamic analyses are conducted using an inelastic model of the structure as designed and detailed. The structural performance of frames designed with different ductility capacities is evaluated using interstorey drift and member curvature ductility response as performance measures. All frames studied are expected to perform at an operational level when subjected to design level seismic excitations and to meet life safe performance criteria at excitations of twice the design level.

DOI:

10.14359/11936


Document: 

SP197-11

Date: 

April 1, 2002

Author(s):

J. P. Moehle, K. J. Elwood, and H. Sezen

Publication:

Symposium Papers

Volume:

197

Abstract:

Earthquake reconnaissance has identified failure of reinforced concrete columnsas a primary cause of collapse of older existing reinforced concrete buildingframes during earthquakes. Apparent column failure, however, does not always result in building collapse. A study of columns tested in the laboratory examinesloss of lateral and vertical load capacities. Correlations with geometric, materials, and loading characteristics are identified.

DOI:

10.14359/11935


Document: 

SP197-10

Date: 

April 1, 2002

Author(s):

G. J. Parra-Montesinos and J. K. Wight

Publication:

Symposium Papers

Volume:

197

Abstract:

The behavior of beam-column connections in WC frame structures has been extensively studied since the 1960’s. These studies have served as the basis for design guidelines for WC joints, in which detailing requirements and stress limits are given to control damage and deterioration of strength and stiffness in the connections. However, no particular attention is paid to the deformation in the joint region and its relation to the connection strength. In this paper a model is presented to evaluate the shear strength of WC joints for various levels of joint shear distortion. The joint model is based on the state of plane strains in the connection through the development of a ratio between the joint principal strains, which was determined from experimental results. Based on the joint model, stress limits are proposed for interior and exterior joints for a shear distortion of 1%. These limits are similar to those recommended by ACI-ASCE Committee 352 for exterior connections. However, they are lower than those recommended for interior joints. The detrimental effect of eccentricity on joint strength is also estimated. Further analyses are required to fully quantify the effect of joint type and details on the principal strain ratio, and thus on joint strength.

DOI:

10.14359/11934


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