Many bridges are subject to lateral damage for their girders due to impact by over-height vehicles collision. In this\nstudy, the optimum configurations of carbon fiber reinforced polymers (CFRP) laminates were investigated to repair the laterally\ndamaged prestressed concrete (PS) bridge girders. Experimental and analytical investigations were conducted to study the\nflexural behavior of 13 half-scale AASHTO type II PS girders under both static and fatigue loading. Lateral impact damage due\nto vehicle collision was simulated by sawing through the concrete of the bottom flange and slicing through one of the\nprestressing strands. The damaged concrete was repaired and CFRP systems (longitudinal soffit laminates and evenly spaced\ntransverse U-wraps) were applied to restore the original flexural capacity and mitigate debonding of soffit CFRP longitudinal\nlaminates. In addition to the static load tests for ten girders, three more girders were tested under fatigue loading cycles to\ninvestigate the behavior under simulated traffic conditions. Measurements of the applied load, the deflection at five different\nlocations, strains along the cross-section height at mid-span, and multiple strains longitudinally along the bottom soffit were\nrecorded. The study investigated and recommended the proper CFRP repair design in terms of the CFRP longitudinal layers and\nU-wrapping spacing to obtain flexural capacity improvement and desired failure modes for the repaired girders. Test results\nshowed that with proper detailing, CFRP systems can be designed to restore the lost flexural capacity, sustain the fatigue load\ncycles, and maintain the desired failure mode.
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