超高性能混凝土(UHPC)π型梁人行天桥设计与施工  

Design and Construction of Ultra-high Performance Concrete(UHPC) π-shaped Beam Footbridge

作　　者：吴亮 陈洪伟 WU Liang;CHEN Hongwei

机构地区：[1]创辉达设计股份有限公司,湖南长沙410219

出　　处：《城市道桥与防洪》2023年第2期83-86,共4页Urban Roads Bridges & Flood Control

摘　　要：超高性能混凝土(UHPC)具有超高强度、超高韧性、低渗透性和高体积稳定性等性能特点,可以大大减轻结构自重、提高耐久性。湖南省湘潭市“两干”[潭州大道(湘潭段)、芙蓉大道(湘潭段)快速化改造]项目中,新建了18座人行天桥,均采用UHPC材料,属国内首次在桥梁主体结构中大规模应用π型梁截面的UHPC人行天桥。着重介绍该桥的设计与施工要点,表明UHPCπ型梁在同类桥梁中具有大规模推广的应用价值。The ultra-high performance concrete(UHPC) has the performance features of ultra-high strength, ultra-high tenacity, low permeability and high-volume stability, can greatly lighten structure weight and improve the durability. In the rapid reconstruction project of two trunks of Tanzhou Avenue(Xiangtan Section) and Furong Avenue(Xiangtan Section) in Xiangtan City of Hunan Province, UHPC material is adopted for 18 newly built footbridges, which belong to UHPC footbridges with the π-shaped beam section applied by large scale in the main structures of bridge firstly in China. The design and construction essentials of this bridge are specially introduced, which show that the UHPC π-shaped beam has the application value of large-scale promotion in the similar bridges.

关 键 词：超高性能混凝土 UHPC Π型梁 人行天桥 

分 类 号：U448.11[建筑科学—桥梁与隧道工程]