Creep Deflections in Slab Buildings and Forces in Shores during Construction

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Title: Creep Deflections in Slab Buildings and Forces in Shores during Construction

Author(s): Manuel Aguinaga-Zapata and Zdenek P. Bazant

Publication: Journal Proceedings

Volume: 83

Issue: 5

Appears on pages(s): 719-726

Keywords: age; concrete construction; concrete slabs; creep properties; deflection;loads (forces); shoring; structural analysis.

Date: 9/1/1986

Abstract:
A method for analyzing forces in shores and reshores during construction of slab buildings and of long-time deflections is developed that accounts for creep of concrete, differences in its age, and the precise construction sequence. Numerical comparisons of computer solutions with the existing elastic solutions indicate that the effects of creep on the forces in the shores and the loads carried by the slab are small when no reshoring is done. In the case of reshoring, the effect of creep is more significant, but still not very large. The practical usefulness of the solution consists mainly in that long-time deflections as influenced by the early-age load history can be calculated.