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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Safety Criteria in Construction of
Author(s): Andrzej, S. Nowak, and Hid N. Grouni
Publication: Concrete International
Appears on pages(s): 80-86
Keywords: bridges (structures); cantilever bridges;
concrete construction; loads (forces); precast con-crete;
prestressed concrete; safety factor; structural
Abstract:Deals with development of design criteria for construction of segmental bridges erected as unbalanced cantilevers. During erection, the segments of such structures are placed alternately on each side of a pier, forming two cantilevers. Under unbalanced conditions, stability is a major consideration. Self-weight of segments is found to be a dominating load in calibration. The vertical prestressing force applied through the pier segment into the pier is treated as a stabilizing effect controlled by design. Safety is measured in terms of the safety index. Load factors are calculated to provide for a satisfactory safety level during construction. The calibration procedure is demonstrated on two typical segmental bridges, a cast-in-place bridge and a precast bridge. The results may be applied to segmental bridges erected by other methods of construction.*
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