Title:
Plastic Mechanism Design of Unbraced Low-Rise
Concrete Frames
Author(s):
F. N. Rad and T. J. Gavin
Publication:
Journal Proceedings
Volume:
77
Issue:
5
Appears on pages(s):
321-328
Keywords:
columns (supports); frames; hinges (structural); limit design
method; reinforced concrete; strength; structural design; ultimate strength
method.
DOI:
10.14359/7009
Date:
9/1/1980
Abstract:
Applicability of limit design concepts to design of low-rise unbraced concrete frames is investigated. Two pairs of frames to represent the lowest level of a 5- and 7-story structure were designed and tested under column, beam, and lateral loads. In each pair, one frame was designed by the ultimate strength design method, and the other by a limit design method. "Building Code Requirements for Reinforced Concrete (ACI 318- 77)" provisions were followed in the design and detailing of frame cross sections, Measured frame capacities exceeded the design loads by an average of 53 percent and 26 percent for frames designed by the ultimate strength design method and the limit design method, respectively. Analytical and experimental results indicate that it is feasible to use limit design methods employing a plastic mechanism approach in designing low-rise unbraced concrete frames.