Seismic Behavior Of Rectangular Concrete Beams With Spirals Near
Potential Plastic Hinges
Author(s)
K. Jaafar & C. Morley
Abstract
Seismic behavior of rectangular concrete
beams with spirals near potential plastic hinges
K. Jaafar & C. Morley
University of Cambridge, Department of Engineering
Abstract
From observation of performance in earthquakes, the Strong Colurnn/Weak
Beam concept has now become fairly standard. This requires an increase in the
column size relative to the beams, and more attention to reinforcement detailing
[I]. The intention is that under strong lateral earthquake motion, plastic hinges
form in the beams adjacent to the column. The hinges at the beam-ends will be
subjected to severe cracking and damage during the earthquake. The question
then arises whether the damaged hinge zone will retain enough shear strength to
hold up the beams and the floors after the earthquake. The end hinge zones,
having been bent well into the failure region both ways, will be cracked right
through top to bottom, and concrete may well have spalled away from both faces
when under compression. Also the rebars may well have bu
Keywords
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