钢-混组合连续梁桥负弯矩区桥面板抗裂措施应用  

Application of Cracking Resistance Measures for Bridge Deck in Negative Bending Moment Zone of Steel-concrete Composite Continuous Beam Bridge

作　　者：赵政耀 ZHAO Zhengyao(Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,Shanghai 200092,China)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海市200092

出　　处：《城市道桥与防洪》2025年第3期119-122,共4页Urban Roads Bridges & Flood Control

摘　　要：以某城市快速路钢-混组合连续梁桥为背景,对钢-混组合连续梁桥负弯矩区桥面板抗裂措施的应用进行研究。通过MIDAS建模分析,研究顶落梁技术、负弯矩区桥面板后浇技术、抗拔不抗剪连接技术、加强配筋技术对预防负弯矩区桥面板开裂及钢梁受力的影响。各项单一抗裂措施的应用结果表明,顶落梁技术通过对桥面板施加预压力的方式预防桥面板开裂,其效果最为显著,各项抗裂措施的综合应用可以充分发挥各项技术的优点,有效阻止负弯矩区桥面板的开裂。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.

关 键 词：钢-混组合连续梁 顶落梁 抗拔不抗剪连接 抗裂措施 

分 类 号：U448.215[建筑科学—桥梁与隧道工程]