The shear design of a corrugated steel web box girder is important for structural reliability. Presently, corrugated steel webs bear all the shear forces, and the top and bottom concrete plates bear no shear force. Each steel web has equal force. This design is conservative and uneconomical and may sometimes be unsafe. The shear ratio and transfer efficiency of each corrugated steel web are investigated in this study through numerical analysis. Then, the distribution of shear stress in corrugated steel webs is verified through a static load test. Results show that the shear is shared by the top and bottom concrete plates and corrugated steel webs. The shear ratio presents a close relation with boundary, loading, and section position. The influence of a transverse diaphragm on the shear ratio is minimal, and this influence demonstrates a certain effect only on the steel webs located at the area of the transverse diaphragm.
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