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- Title
Deflection Estimation of Reinforced Concrete Flat Plates Using ACI Method.
- Authors
Hossain, Tahsin Reza; Vollum, Robert; Ahmed, Salah Uddin
- Abstract
Building codes provide minimum thickness guidelines for two-way slabs to ensure that deflections are not excessive. Thinner slabs are allowed if calculated deflections are found to be acceptable, but there are relatively few reliable deflection measurements in buildings that can be used to assess the accuracy of deflection prediction methods. The construction of the seven-story in-place reinforced concrete frame building in the Building Research Establishment Large Building Test Facility in Cardington, UK, presented a unique opportunity to assess deflection prediction methods for flat plates because deflections, material properties, and loadings were measured. The first two authors have previously shown that long-term deflections were governed by short-term construction loading at Cardington. This paper proposes a refinement to the ACI 318 deflection multiplier approach, which accounts for the effect of short-term construction loading on deflections. The method is validated with deflection data from Cardington and six slabs tested by the second author.
- Subjects
CARDINGTON (Shropshire, England); ENGLAND; MAINTAINABILITY (Engineering); CONSTRUCTION materials; CONSTRUCTION slabs; CONSTRUCTION equipment industry
- Publication
ACI Structural Journal, 2011, Vol 108, Issue 4, p405
- ISSN
0889-3241
- Publication type
Article
- DOI
10.14359/51682980