预制蝶形腹板的抗剪性能与桥梁应用研究  

Research on Shear Performance and Construction Technology of Butterfly Web Bridge

作　　者：李会驰[1] 孙耀宗 徐麟[1] LI Hui-chi;SUN Yao-zong;XU Lin(CCCC Highway Consultants Co.Ltd.,Beijing 100088,China)

机构地区：[1]中交公路规划设计院有限公司,北京市100088

出　　处：《公路》2021年第10期104-112,共9页Highway

摘　　要：为理清高性能混凝土预制蝶形腹板的抗剪承载特性,推广应用蝶形腹板桥梁,收集整理了抗剪性能试验和理论分析数据、工程建设案例和应用研究,形成了蝶形腹板梁的抗剪设计理论和蝶形腹板桥的标准化设计与施工方法。蝶形腹板采用钢纤维混凝土,仅在主拉应力方向配置预应力钢筋,可提供可靠的抗剪承载力。蝶形腹板桥可采用统一的腹板尺寸,便于标准化设计和施工,通过工程实践已形成腹板预制、悬臂施工和逐跨施工等成熟工艺。蝶形腹板桥充分利用高性能混凝土的材料特性,适用于400m矮塔斜拉桥和800m矮塔斜拉—悬索协作体系。In order to clarify the shear performance and construction technology of butterfly web bridge,the shear performance test and theoretical analysis data,project construction cases and application research are collected,the shear design theory,the standardized design and construction method are formed.The shear performance is determined by the steel-fiber-reinforced concrete and the prestressed reinforcement in the main-tensile-stress zone.The butterfly web bridge could adopt uniform web size.Through engineering practice,mature technologies such as web prefabrication,cantilever construction and span-by-span construction have been formed.The butterfly web bridge can make full use of the material characteristics of high-performance concrete and can be applied to extradosed bridge with 400 mspan,extradosed and suspension hybrid bridge with 800 mspan.

关 键 词：矮塔斜拉桥 蝶形腹板 抗剪性能 标准化设计施工 应用研究 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]