Crack Width Calculation of SteelConcrete Composite Bridge Deck in Negative Moment Region DAI Changyuan, SU Qingtian

Abstract:

Five steel concrete composite bridge deck specimens were manufactured and subjected to negative moment loading. It could be observed that the strain of rebar and steel plate of splitting section does not obey the plainsection assumption. The strain of rebar is obviously larger than the value calculated according to the plainsection assumption. Then, a formula which can be used to calculate the rebar stress of cracked section was deduced. The calculating results agreed well with the test values. Finally, different crack width predicting methods were compared. The results show that when using the formula recommended in this paper to calculate the rebar stress, adopting the crack width calculation formula specified in JTG D62 2004 and using the parameters of eccentric tension member, the calculated crack width agrees well with the test values.