Shored/Reshored Construction of Flat Plates

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Title: Shored/Reshored Construction of Flat Plates

Author(s): Luc Monette and N.J. Gardner

Publication: Concrete International

Volume: 37

Issue: 9

Appears on pages(s): 25-32

Keywords: deflection, punching shear, construction, form

Date: 9/1/2015

Abstract:
Flat plates are usually constructed using a single level of shores (forms) supporting the freshly placed concrete. Shored construction accumulates load to the lowest (oldest) plate in the shored sequence, while shored/reshored construction applies the load to the upper (youngest) plate in the system. Historical shoring analyses are reviewed and the results of a parametric analysis of the effect of reshore stiffness are presented. Based on the analyses, factors are provided for calculation of the required strength of supporting flat plates in buildings constructed using a single level of shores and multiple levels of elastic reshores.