活性粉末混凝土人行天桥试设计研究  

Trial-design of a reactive powder concrete pedestrian bridge

作　　者：黄卿维[1,2] 吴永银[2] 杜任远[2] 陈宝春[2] 陈宜言 吴庆雄[2] 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]福州大学土木工程学院,福建福州350108 [3]深圳市市政设计研究院有限公司,广东深圳518035

出　　处：《广西大学学报（自然科学版）》2012年第4期751-756,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：科技部国际科技合作计划项目(2009DFA72220);福建省发展与改革委员会项目;福州大学科技发展基金项目(2011-XQ-27)

摘　　要：活性粉末混凝土(RPC)是一种抗压强度高且韧性、耐久性好的水泥基复合材料,应用于人行天桥,具有经济、美观、耐久性好等特点。以主跨47 m的某人行天桥为原型,进行了RPC人行天桥试设计。分析结果表明,与钢桥相比,RPC桥性价比较高,主梁材料费用为钢桥的61.0%;与预应力混凝土(PC)桥相比,结构受力性能有较大的提高,主梁混凝土和预应力筋用量减少56.4%和18.2%,结构自重减轻53.9%。因此,RPC人行天桥具有较大的应用优势。Reactive powder concrete （RPC） is a cement-based composite material with super-high compressive strength, high toughness and good durability, which could be used to build pedestrian bridge and make the bridge cost-efficient, aesthetic and durable. Taking a pedestrian bridge with a main span of 47 m as the prototype, a trial design of RPC pedestrian bridge was conducted. Analysis results show that the RPC pedestrian bridge has a better cost performance and the material of its girder cost is 39% less than that of the steel pedestrian bridge. Compared with the prestressed con- crete （PC） pedestrian bridge, RPC pedestrian bridge has better mechanical performance, and the consumptions of concrete and steel are decreased by 56.4% and 18.2% , respectively, resulting in a reduction of 53.9% of the self-weight. Therefore, RPC pedestrian bridge has considerable appli- cation advantages.

关 键 词：人行天桥 活性粉末混凝土 试设计 受力性能 材料费用 

分 类 号：TU398[建筑科学—结构工程] U443[建筑科学—桥梁与隧道工程]