现代竹结构人行天桥的研发和建造  

Research and construction of modern bamboo pedestrian bridges

作　　者：单波[1] 周泉[1] 肖岩[1,2] 

机构地区：[1]湖南大学土木工程学院现代竹木及组合结构研究所,长沙410082 [2]南加州大学土木系,洛杉矶ca90089

出　　处：《建筑结构》2010年第1期92-96,共5页Building Structure

基　　金：长江学者创新团队计划(IRT0619);国家自然科学基金专项(50848044);湖南大学土木工程学院现代竹木及组合结构研究所(IBTCS)启动基金

摘　　要：提出了一种以胶合竹板为基本材料的现代竹结构人行桥梁,并通过3根足尺试件试验,研究了胶合竹板制成长梁的成型工艺和构件的力学性能。试验显示,竹梁的破坏是由受压区竹材分层导致对接头错位引起的,CFRP增强层对竹梁的强度有所提高,采用短板拼接、整体胶合成型的大尺寸竹梁的刚度和承载力均能满足人行天桥建设的要求。根据试验和分析结果,研究者采用预制装配方式建造了一座现代竹结构人行天桥,并在建造中对竹结构人行桥采取了整体防水处理。该桥经过两年多的使用,主体结构正常。A new type of bridge structure using laminated bamboo girders is presented. Three full-scale bamboo beams were tested in order to research processing methods and mechanical performance of model beams. The failure of the beams was caused by the delamination of laminated bamboo sheet or joint fracture in the mid-span zone. The CFRP sheet in the tensile side of beam showed effect of increasing capacity. The bamboo beam has enough stiffness and loading capacity for building pedestrian bridges. Based on testing and analysis, a modern bamboo pedestrian bridge was constructed successfully using a prefabricated procedure. The bridge performs well for more than two years after it was opened to usage.

关 键 词：竹结构 胶合竹板 竹梁 人行天桥 

分 类 号：TU366.101[建筑科学—结构工程] U448.11[建筑科学—桥梁与隧道工程]