本文選題：預(yù)制混凝土夾芯保溫墻板　切入點：連接件　出處：《武漢理工大學》2014年博士論文　論文類型：學位論文

【摘要】：預(yù)制混凝土夾芯保溫外墻板目前在各國已得到廣泛應(yīng)用，連接件作為連接墻板的內(nèi)外兩層混凝土的重要預(yù)埋件，是影響墻板力學性能和熱工性能的關(guān)鍵因素。以往主要是采用混凝土肋、桁架式鋼筋拉結(jié)等傳統(tǒng)方式，對熱工性能削弱較多，因此急需新型連接件產(chǎn)品，滿足不斷提高的熱工性能要求。十二五國家科技支撐計劃項目“新型預(yù)制裝配式混凝土建筑技術(shù)研究與示范”的課題五“裝配式建筑用墻板及構(gòu)配件生產(chǎn)技術(shù)研究”的研究目標之一是對采用不同連接件以及不同配置設(shè)計的預(yù)制混凝土夾芯保溫墻板的性能以及設(shè)計進行系統(tǒng)的研究。本文以此項目為依托，主要研究內(nèi)容如下： 1）從預(yù)制混凝土夾芯保溫墻板的三種受力模型入手展開研究，并針對內(nèi)外兩層混凝土獨立承受外力作用的獨立式墻板進行了節(jié)點變位試驗研究工作，設(shè)計了一個足尺預(yù)制混凝土夾芯保溫墻板安裝在主體結(jié)構(gòu)上的模擬靜力試驗，研究表明：當主體結(jié)構(gòu)發(fā)生水平位移時，該墻板的四個可滑移節(jié)點分別發(fā)生了變位以適應(yīng)水平位移，墻板本身發(fā)生扭轉(zhuǎn)，沒有裂縫產(chǎn)生，未對主體結(jié)構(gòu)產(chǎn)生剛度影響，提出了連接件的彎矩剪力-變形力學模型。 2）從熱工性能入手開展對單個連接件的尺寸形狀、錨固長度、截面型式和選用材料入手研究，完成國產(chǎn)連接件的產(chǎn)品設(shè)計和定型。針對設(shè)置有四種不同材質(zhì)、截面型式以及布置方法的混凝土試件進行了熱工性能試驗，試驗表明，非金屬拉結(jié)試件熱工性能最好，鋼桁架拉結(jié)試件熱工性能最差。 3）選取前三種連接件設(shè)計了兩種設(shè)置方式（分為金屬和非金屬兩類），分別進行了力學性能的理論研究、數(shù)值模擬和試驗驗證，獲得了試件的荷載位移曲線、試件面層位移、剪切極限承載力和連接件的荷載應(yīng)力曲線，，驗證了理論模型的正確。 4）根據(jù)前述研究結(jié)果，分別針對兩種設(shè)置方式提出了設(shè)計方法。以一個預(yù)制混凝土夾芯保溫墻板為例給出設(shè)計方法，提出剪力分配系數(shù)和拉力分配系數(shù)，并運用力學計算方法給出了其建議值。 最后總結(jié)了預(yù)制混凝土夾芯保溫墻板連接件設(shè)計的方法，對規(guī)范和設(shè)計提出了一些建議，同時指出了預(yù)制混凝土夾芯保溫墻板連接件需要進一步研究的關(guān)鍵問題。
[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.
【學位授予單位】：武漢理工大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TU37;TU551

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