Whole rigidity characteristic of T-beam bridge under random traffic flow

ANSYS program was used to establish the space bar element models of T-beam bridges with three different transverse connections, such as hinging, wet seaming and wet seaming with integral layer.The load spectrum of random traffic flow was programmed.Bridge dynamic analysis system(BDANS)was used to calculate the dynamic deflection of T-beam bridge under random traffic flow, and its whole rigidity characteristic was analyzed.The result shows that the rule of transverse distribution of dynamic response is consistent with that of static reaction.The dynamic response of every beam for T-beam bridge with hinging connection is very different, which shows that its whole rigidity is worst.Its maximum deflections under various traffic operations are 1.30 times larger than those with other two connections, and can reach 2.02 times as much as those under regular one-lane traffic operation.The dynamic response of every beam for wet seaming connection and wet seaming connection with integral layer is similar.Therefore, the whole rigidities of T-beam bridges with the latter two connections increase evidently.