Abstract:Taking an urban expressway steel-concrete composite continuous beam bridge as the background, the application of crack resistance measures for bridge deck in the negative bending moment zone of steel-concrete composite continuous beam bridge is studied. Through MIDAS modeling and analysis, the effects of top-down beam technology, post-pouring technology for bridge deck in negative bending moment zone, anti-pull and non-shear connection technology and reinforcement strengthening technology on preventing the bridge deck cracking and steel beam stress in negative bending moment zone are studied. The application results of various crack resistance measures indicate that the top-down beam technology has the most significant effect on preventing the bridge deck cracking by applying prepressure to the bridge deck. The comprehensive application of various crack resistance measures can fully play the advantages of various technologies and effectively prevent the bridge deck cracking in the negative bending moment zone.
