Experimental evaluation of pretopped precast diaphragm critical flexure joint under seismic demands

D. Zhang, R. B. Fleischman, C. J. Naito, R. Ren

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Precast concrete diaphragm seismic response is examined in experimental research integrating model-based simulation with physical testing. The experimental substructure is the diaphragm critical flexural region of a prototype precast parking structure. This region is expected to undergo significant inelastic flexural deformation, while potentially nonductile regions remain elastic on the basis of capacity design rules from an emerging design methodology. The physical test is conducted at half-scale. The test specimen is detailed using diaphragm reinforcement intended to meet deformability requirements. Predetermined displacement histories are applied to the test specimen on the basis of nonlinear transient dynamic analyses of the prototype structure. The loading history is applied by a test fixture capable of simultaneously providing shear, axial, and moment to the joint. Moment strength, stiffness, rotational deformation capacity, and progressive damage are examined under a sequence of increasing intensity earthquakes. Design recommendations are provided.

Original languageEnglish (US)
Pages (from-to)1063-1074
Number of pages12
JournalJournal of Structural Engineering
Issue number10
StatePublished - Oct 2011


  • Concrete
  • Diaphragms
  • Precast
  • Seismic design
  • Tests

ASJC Scopus subject areas

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


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