Experimental study on seismic performance of coupling beams not designed for ductility

Siu Shu Eddie Lam, B. Wu, Z. Q. Liu, Y. L. Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)317-333
Number of pages17
JournalStructural Engineering and Mechanics
Issue number3
Publication statusPublished - 20 Feb 2008


  • Coupling beams
  • Ductility
  • Reinforced concrete
  • Seismic
  • Shear
  • Ultimate drift angle

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Mechanical Engineering

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