基于强度的预制混凝土夹芯保温墙板连接件设计研究

发布时间：2018-03-09 06:25

本文选题：预制混凝土夹芯保温墙板　切入点：连接件　出处：《武汉理工大学》2014年博士论文　论文类型：学位论文

【摘要】：预制混凝土夹芯保温外墙板目前在各国已得到广泛应用，连接件作为连接墙板的内外两层混凝土的重要预埋件，是影响墙板力学性能和热工性能的关键因素。以往主要是采用混凝土肋、桁架式钢筋拉结等传统方式，对热工性能削弱较多，因此急需新型连接件产品，满足不断提高的热工性能要求。十二五国家科技支撑计划项目“新型预制装配式混凝土建筑技术研究与示范”的课题五“装配式建筑用墙板及构配件生产技术研究”的研究目标之一是对采用不同连接件以及不同配置设计的预制混凝土夹芯保温墙板的性能以及设计进行系统的研究。本文以此项目为依托，主要研究内容如下： 1）从预制混凝土夹芯保温墙板的三种受力模型入手展开研究，并针对内外两层混凝土独立承受外力作用的独立式墙板进行了节点变位试验研究工作，设计了一个足尺预制混凝土夹芯保温墙板安装在主体结构上的模拟静力试验，研究表明：当主体结构发生水平位移时，该墙板的四个可滑移节点分别发生了变位以适应水平位移，墙板本身发生扭转，没有裂缝产生，未对主体结构产生刚度影响，提出了连接件的弯矩剪力-变形力学模型。 2）从热工性能入手开展对单个连接件的尺寸形状、锚固长度、截面型式和选用材料入手研究，完成国产连接件的产品设计和定型。针对设置有四种不同材质、截面型式以及布置方法的混凝土试件进行了热工性能试验，试验表明，非金属拉结试件热工性能最好，钢桁架拉结试件热工性能最差。 3）选取前三种连接件设计了两种设置方式（分为金属和非金属两类），分别进行了力学性能的理论研究、数值模拟和试验验证，获得了试件的荷载位移曲线、试件面层位移、剪切极限承载力和连接件的荷载应力曲线，，验证了理论模型的正确。 4）根据前述研究结果，分别针对两种设置方式提出了设计方法。以一个预制混凝土夹芯保温墙板为例给出设计方法，提出剪力分配系数和拉力分配系数，并运用力学计算方法给出了其建议值。最后总结了预制混凝土夹芯保温墙板连接件设计的方法，对规范和设计提出了一些建议，同时指出了预制混凝土夹芯保温墙板连接件需要进一步研究的关键问题。
[Abstract]:Prefabricated concrete sandwich insulation wall panels have been widely used in various countries at present. Connectors are used as important embedded parts of the inner and outer layers of concrete connecting the wall panels. It is a key factor that affects the mechanical and thermal properties of wall panels. In the past, the traditional ways such as concrete ribs and truss steel bars were used to weaken the thermal properties of wall panels, so it is urgent to produce new connectors. To meet the increasing requirements of thermal performance. Research on the production Technology of Wall panels and Construction parts for fabricated buildings in the 12th Five-Year Plan of National Science and Technology support Project "Research and demonstration of New Type prefabricated concrete Building Technology" One of the objectives of the research is to systematically study the performance and design of prefabricated concrete sandwich wall panels with different connectors and different configurations. The main contents of the study are as follows:. 1) starting with the three stress models of precast concrete sandwich wall panels, the joint displacement test work is carried out for the independent wall panels with internal and external concrete acting independently. In this paper, a full-scale precast concrete sandwich wall board installed on the main structure is designed. The results show that: when the main structure is horizontally dislocated, The four slippable joints of the wall board are shifted to adapt to the horizontal displacement respectively. The wall plate itself has torsion no cracks and no stiffness effect on the main structure. The moment shear deformational mechanics model of the connectors is put forward. 2) starting from the thermal performance, the paper studies the dimension and shape, anchoring length, section type and selection of materials of a single joint, and completes the product design and finalization of the domestic connection. There are four different materials for the installation. The test results show that the thermal performance of non-metal tensile specimens is the best, and that of steel truss tensile specimens is the worst. 3) the first three kinds of connectors are selected to design two kinds of settings (metal and non-metal, respectively). The mechanical properties are studied, numerical simulation and experimental verification are carried out, and the load-displacement curve of the specimen and the displacement of the surface layer of the specimen are obtained. The shear ultimate bearing capacity and the load-stress curve of the connectors verify the correctness of the theoretical model. 4) according to the above research results, two design methods are put forward respectively. Taking a precast concrete sandwich insulation wall board as an example, the shear distribution coefficient and the tension distribution coefficient are put forward. The suggested values are given by means of mechanical calculation. Finally, the design method of prefabricated concrete sandwich insulation wall board connection is summarized, some suggestions for specification and design are put forward, and the key problems for further study of precast concrete sandwich insulation wall board connection are pointed out.
【学位授予单位】：武汉理工大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TU37;TU551

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