Error Analysis on Force Decomposition of Applied Eccentric Load for Concrete Box-girder

Abstract

Abstract. The paper is devoted to error analysis on force decomposition of applied eccentric load for concrete box-girder, the main parameter eccentric 'e' was considered. The stress under eccentric load, symmetric load, and anti-symmetric load is extracted from ABAQUS model, the floor stress along the cross-section and longitudinal beam were analyzed. The results show that force decomposition methodology can be used when eccentric load be 0 and b/2, when eccentric distance e=b/2, the error is zero, which means the force decomposition methodology is correct under this condition; when e=0, there is no torsion exist, the error is also very small. But when 0<e<b/2, the error can be very high at some point, the majority error can get 100%, this is very high, and can't be ignored, we should pay more attention on it. As a whole, the force decomposition theory of applied eccentric load for concrete box-girder can be only used when eccentric distance e=0 and e=b/2.