Dynamic Responses of Flat Plate Systems with Shear Reinforcement

Earthquake-resistant designs often use a lateral-force resisting system to resist the seismic forces and a nonparticipating system to support vertical loads. Use of flat plate floor systems consisting of a conventional or post-tensioned reinforced concrete slab-column system incorporating shear reinforcement within the slab-column connection region has become increasingly popular as a lateral-force resisting system. There is little information available to assess the dynamic responses of such systems, particularly for post-tensioned systems. This article reports on a study that consisted of shaketable tests of a conventional reinforced-concrete slab-column frame (RC specimen) and a post-tensioned slab-column frame (PT specimen). Lateral drift ratios of approximately 3 and 4% were achieved during testing for the RC and PT system frames, respectively, with relatively little loss of lateral load capacity. The damage observed at the RC connections was more significant and more widely distributed than those observed for the PT specimen. The test results indicate that use of slab shear reinforcement substantially reduces the extent of damage and prevents the "dropping" of the slab observed in reinforced concrete connections where shear reinforcement is not provided. The authors note that this may be an important factor in post-earthquake repairs.

  • Availability:
  • Authors:
    • Kang, Thomas H-K
    • Wallace, John W
  • Publication Date: 2005-9

Language

  • English

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Filing Info

  • Accession Number: 01003899
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 19 2005 7:35AM