Abstract
In this paper, the ultimate strength of open box girders with crack damage subjected to pure torque, compressive force, bending moment and combined loads is investigated using a commercial FEA program, ABAQUS. The ultimate strength reduction characteristics of the box girders due to cracking damage as a function of crack types, crack sizes and crack locations are studied. Based on the numerical results obtained from the present study, a simple model for predicting the residual ultimate strength of open box girders with crack damage under single load and combined loads is proposed. The suggested model has a simple form yet well represents the lower bounds of the reduced ultimate strength due to crack damage.
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