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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: Experimental Study on the Behvior of High-Strength and Normal-Strength Concrete Beams in a Tennessee Bridge
Author(s): X.S. Huo, P. Zhu, and F. Ung
Publication: Special Publication
Appears on pages(s): 863-882
Keywords: bridge; concrete deck; deflection; diaphragm; high-strength concrete (HSC); high-performance concrete (HPC); precastbeam; temperature; time-dependent strain
Abstract:This paper presents an experimental study on a high-performance concrete (HPC) bridge in Tennessee. The bridge is a twin-bridge with high-strength concrete (HSC) beams in one bridge lane and normal-strength concrete (NSC) beams in the other lane. The compressive strength of HPC and NSC were 89 MPa and 48 MPa, respectively. The bridge was instrumented for concrete strains and temperatures of precast beams, cast-in-place decks and diaphragms. The cambers of prestressed beams were also measured during various construction stages. Test results presented in the paper include material properties of concretes, temperature changes in concrete, time-dependent strains of precast HSC and NSC beams, cambers of HSC and NSC beams, and strain changes of deck and diaphragm. A comparison study was conducted for the performance differences between the HSC and NSC bridge members. It was observed that the HSC members exhibited rapidly developed early-age creep and shrinkage strains, rapidly developed time-dependent cambers, and obvious differential shrinkage with deck concrete compared to the NSC members. The recommendations for design and construction of HSC bridges are also presented in the paper.
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