Abstract
Thermosetting resin composite material has been widely used in strengthening the concrete members. However, there are only a few applications in strengthening steel structure. Based on the finite element analysis software ANSYS in this article, mechanical analysis are carried out for the lower chord before and after reinforcement of the long-span steel truss bridge and comparison are made. Interlaminar stresses in X, Y, Z three directions of the composite laminates are extracted. Compared with the results, the conclusion that application of composite materials for reinforcement of the lower chord can change the stress of the lower chord and improve the quality of the steel trussed bridge is drawn out.
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