The use of heavier trucks demanded upgrading of a twenty-seven year old bridge in Winnipeg, Manitoba, Canada. Analysis of the precast prestressed concrete girders using the current AASHTO Code indicates a deficiency in the shear capacity. Shear strengthening using Carbon Fibre R_einforced Polymer (CFRP) sheets provides a low-cost solution by increasing the speed of construction and reducing tra...

Seven state-of-the-art machine learning techniques for estimation of construction costs reinforced-concrete and prestressed concrete bridges are investigated in this paper, including artificial neural networks (ANN) ensembles ANNs, regression tree (random forests, boosted bagged trees), support vector (SVR) method, Gaussian process (GPR). A database design characteristics 181 prestressed-concre...

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Self-consolidating concrete (SCC) has been developed for use in precast prestressed concrete bridge girders in the state of Minnesota. Locally available materials were used with a number of cementitious and filler materials, including ASTM Type III cement, Class C fly ash, and blast furnace slag. SCC was successfully proportioned with both natural river gravels and crushed stone as coarse aggre...

In this paper, the linear vibrations of thermally prestressed beams are studied, including the prebending effects. General equations governing structural vibrations superimposed on an initial static state are first given. They are applied to a planar Euler-Bernoulli beam under the assumption of small prestrain and large predisplacement. Initial imperfections are included in the whole analysis. ...

Over the past six years of implementing the Innovative Bridge Research and Construction Program under the Transportation Equity Act, Fiber Reinforced Polymer (FRP) composites technology have successfully demonstrated its potential for structural applications in bridges. The Federal Highway Administration (FHWA) has funded over 120 projects scattered throughout the United States and subject them...