This paper presents the results of a pilot research study on the use of polymer composites in repair and rehabilitation of structural wood members. In this pilot project, a total of eight full-scale tests were conducted to investigate the behavior of wooden members repaired and retrofitted with external composite laminates. A total of eight 8"X"8X10' (203 mm X 203 mm X 3.0 m) Douglas Fir Larch 1 wooden members with an without polymer composites overlays were tested to failure. The control specimen test were conducted to determine the ultimate moment capacity of the unreinforced wood. A control damaged (pre-cracked) specimen was subjected to a similar loading regime to compare its performance to a similar beam with carbon/epoxy composite repair system. For repair application, a damaged beam was repaired by applying two cross-play laminates covering both the tension side and two-thirds of the beam depth and was loaded to failure. Load/deflection and stress/strain curves were developed and modes of failure were identified. For the rehabilitation application, an "undamaged" wood beam specimen was strengthen externally with two laminates of cross-ply carbon/epoxy composites, and was loaded to failure. The ultimate capacity of the unreinforced wood member was 7.1 kips (31.6 kN) with a deflection of 1.5" (38 mm) at failure. The load carrying capacity of the retrofitted specimen has increased up to 238.27
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