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Title: Experimental study on seismic performance of coupling beams not designed for ductility
Authors: Lam, S 
Wu, B
Liu, Z
Wong, Y
Keywords: Reinforced concrete
Coupling beams
Ultimate drift angle
Issue Date: 2008
Publisher: Techno Press
Source: Structural engineering and mechanics, 2008, v. 28, no. 3, p. 317-334 How to cite?
Journal: Structural engineering and mechanics 
Abstract: Seismic performance of coupling beams not designed for ductility is examined. Eight 1:4 scale coupling beam specimens, with seven reinforced concrete sections and one composite section, were tested under cycles of push-pull action. Characteristics of the specimens include moderate shear span ratio in the range of 2.5-3.5, high main reinforcement ratio at 3-4% and small to large stirrup spacing with 90- degree hooks. All the reinforced concrete specimens failed in a brittle manner. Displacement ductility of specimens with large stirrup spacing (140 mm) is in the range of 3 to 5. Seismic performance of the specimens is also examined using the ultimate drift angle and the amount of energy dissipated. Correlating the test data, an empirical relationship is proposed to estimate the ultimate drift angle of a class of coupling beams considered in the study not designed for ductility.
ISSN: 1225-4568
EISSN: 1598-6217
DOI: 10.12989/sem.2008.28.3.317
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