关键词：
竹结构;构造形式;增强技术;力学性能;组合构件
摘 要：
竹材是一种可持续发展的生物质材料,其作为传统建筑材料有悠久的历史。现代竹结构使用力学性能更加优异的工程竹材作为原材料,可实现更加灵活的建筑形式和结构布局,但普通竹材受弯构件存在截面刚度低、承载力与跨越能力不足等问题,在一定程度上限制了竹结构的应用,故研发竹构件增强技术具有重要意义。结合已有的竹材构件增强技术研究成果对其构造形式和力学性能进行系统阐述,主要包括配筋竹构件、工字形竹木组合构件、纤维复合材料(fibre-reinforced plastic,FRP)片材增强竹构件、竹-混凝土组合构件和竹-金属组合构件等。将竹材与金属、FRP及混凝土材料组合,其多种材料协调工作形成增强竹构件,增强竹构件的刚度、承载力等力学性能较普通竹构件有较大提升,能够更好地作为结构工程领域的承载构件使用。开发竹材受弯构件的更多有效增强形式、优化材料间连接构造形式、定量评价增强竹材构件的耐久性能、构建多样化的结构体系以及实现现代竹结构产业化发展等,应是未来竹材增强领域研究关注的重点方向。
译 名：
Research progress of strengthening technology for bamboo flexural members
作 者：
WEI Yang;WANG Zhiyuan;CHEN Si;ZHAO Kang;DING Mingmin;College of Civil Engineering,Nanjing Forestry University;
关键词：
bamboo structures;;structural form;;strengthening technology;;mechanical properties;;composite member
摘 要：
To solve the problem of insufficient supply of engineering timber in China,the development and utilization of bamboo would be an effective solution. As a natural bio-material,bamboo has an asset of higher strength to weight ratio compared to wood,and has advantages for withstanding bending and tension loads. Different from traditional bamboo structures using raw bamboo materials,modern bamboo structures use a variety of engineering bamboo materials with better mechanical properties as structural materials,which can achieve more flexible architectural forms and structural layout. The development of engineering bamboo can reduce the imbalance between supply and demand of wood in China to a considerable extent. However,ordinary bamboo flexural members have some drawbacks such as low bearing capacity,small cross-sectional stiffness and insufficient spanning capacity,limiting the application of modern bamboo structure,therefore,it is necessary to develop the strengthening technology for modern bamboo structures. Relevant strengthening technologies of bamboo member were summarized in this paper,their structural forms and mechanical properties were illustrated systematically. Bars reinforced bamboo members,bamboo-wood composite members,fiber-reinforced plastic(FRP) reinforced bamboo members,bamboo-concrete composite members,bamboo-metal composite members were reported,in which,various materials work together to form reinforced bamboo members. The mechanical performance of strengthened bamboo members like stiffness and bearing capacity has been greatly improved compared with the ordinary bamboo member,which can be better used as a load-bearing member in the field of structural engineering. Specifically,the high tensile strength reinforcement materials,such as steel bars or FRP,are selected in the tension zone of the component. The high compressive strength reinforcement materials,such as concrete,are set in the compression zone. The mechanical properties of bamboo components can be improved,due to enabling the best properties of both materials to be utilized. The strengthened bamboo members are especially suitable for the flexural members in the field of civil engineering,such as beam members,slab members,which can be applied in some structural engineering such as multi-story public buildings,rural buildings,and landscape bridges.Based on the existing researches,there are still some problems to be solved in the technology and related theory of strengthened bamboo flexural members. Developing more effective strengthening forms,quantitatively evaluating the durability and long-term performance,optimizing the connection structures between different materials for bamboo flexural members,realizing the industrialization development,as well as establishing innovative structural systems will be the focus of the future research in the field of strengthening bamboo structures.
