Behavior of instrumented prestressed high performance concrete bridge girders

November 29, 2010
Publication: Construction and Building Materials v 24 n 11 p 2294-2311
Author(s): Dwairi H.M. Wagner, Matthew C. Kowalsky M.J. Zia P.

Abstract: A comprehensive monitoring of the behavior of four prestressed high performance concrete (HPC) bridge girders, with higher compressive strength, during construction and while in service, is discussed in this article. The instrumentation and monitoring of a group of four girders during the process of casting operation, after construction and under the conditions and influences of traffic and thermal loads, as well as under controlled load conditions is done. The information about the parameters like transfer length, prestress loss, heat of hydration, compressive strength, modulus of elasticity, modulus of rupture, creep, shrinkage, coefficient of thermal expansion, chloride permeability, etc., is measured and presented here. In-service monitoring and controlled load tests are further done on the girders for further study and presentation. After this, the experimental and theoretical results are compared. The background of the study may be attributed to the fact that many highway bridges are rated structurally or functionally deficient and also the fact that there is a need for more field data on high performance concrete.

Markets: Bridge