本文選題：噴涂混凝土夾心墻　切入點(diǎn)：軸心受壓　出處：《清華大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：住宅產(chǎn)業(yè)化是我國住宅建設(shè)的發(fā)展方向，住宅產(chǎn)業(yè)化的一個(gè)重要方面是采用裝配整體式工業(yè)化結(jié)構(gòu)體系。夾模噴涂混凝土夾心剪力墻結(jié)構(gòu)（也稱為SW建筑體系）是一種新型工業(yè)化住宅體系，具有結(jié)構(gòu)、保溫、防火一體化的優(yōu)點(diǎn)，符合我國節(jié)能減排的基本國策。SW建筑體系的主要承重及抗側(cè)力構(gòu)件為夾模噴涂混凝土夾心剪力墻（簡稱夾心墻）。為給夾心墻的設(shè)計(jì)提供依據(jù)，本文完成了4個(gè)夾心墻試件的軸心受壓試驗(yàn)以及12個(gè)夾心墻試件在恒定豎向力和往復(fù)水平力作用下的擬靜力試驗(yàn)，采用MSC. Marc (2010)對夾心墻進(jìn)行了有限元分析，研究了參數(shù)對試件承載力及剛度的影響。 軸心受壓試驗(yàn)結(jié)果表明：夾心墻試件的破壞形態(tài)為彎折破壞；夾心墻的軸心受壓承載力可采用鋼筋混凝土柱軸心受壓承載力的公式進(jìn)行計(jì)算；夾心墻的軸心受壓承載力和軸向剛度隨混凝土層厚度的增大而增大，而插絲間距則對夾心墻的軸心受壓承載力和軸向剛度沒有影響。 擬靜力試驗(yàn)結(jié)果表明：試件的各層混凝土和邊緣構(gòu)件為一個(gè)整體，能共同抵抗豎向力和水平力，墻體和邊緣構(gòu)件間的豎縫連接可靠；在恒定豎向力和往復(fù)水平力作用下的夾心墻試件有壓彎破壞、剪切破壞和彎剪破壞3種破壞模式；壓彎破壞的試件，其極限位移角大于1/120，，彈塑性變形能力滿足剪力墻結(jié)構(gòu)抗震要求；剪切破壞或彎剪破壞的試件，其極限位移角小于1/120，彈塑性變形能力不滿足剪力墻結(jié)構(gòu)抗震要求；壓彎破壞試件的耗能能力比剪切破壞和彎剪破壞試件的耗能能力大；壓彎破壞試件，最外側(cè)豎向鋼筋受拉屈服時(shí)底截面豎向鋼筋的應(yīng)變分布符合平截面假定；試件在軸壓力作用下的斜截面受剪承載力和正截面受彎承載力，可采用現(xiàn)行規(guī)范鋼筋混凝土剪力墻承載力公式計(jì)算。 有限元分析及參數(shù)分析的結(jié)果表明：有限元的數(shù)值模擬結(jié)果與試驗(yàn)實(shí)測結(jié)果基本吻合；夾心墻的承載力和剛度隨軸壓比、混凝土強(qiáng)度及厚度的增大而增大；鋼絲強(qiáng)度對夾心墻剛度基本無影響；鋼絲網(wǎng)參與抗剪但不參與抗彎。本文還對8個(gè)不同剪跨比、設(shè)置鋼筋網(wǎng)的夾心墻進(jìn)行了有限元分析。結(jié)果表明：夾心墻均為壓彎破壞；隨剪跨比增大，夾心墻的承載力和剛度下降，峰值位移及位移角增大。 根據(jù)試驗(yàn)及有限元分析結(jié)果，提出了噴涂混凝土夾心墻應(yīng)按強(qiáng)剪弱彎的原則設(shè)計(jì)等建議，可供實(shí)際工程設(shè)計(jì)參考。
[Abstract]:Housing industrialization is the development direction of housing construction in China. One of the important aspects of housing industrialization is to adopt the assembly integral industrial structure system. The sandwich shear wall structure (also known as SW building system) is a new type of industrial housing system with structure and insulation. The advantages of fire prevention integration are in line with the basic national policy of energy saving and emission reduction in our country. The main load-bearing and lateral force resisting components of the building system are the sandwich sprayed concrete sandwich shear wall (sandwich wall for short), which provides the basis for the design of the sandwich wall. In this paper, the axial compression test of four sandwich wall specimens and the pseudostatic test of 12 sandwich wall specimens under the action of constant vertical force and reciprocating horizontal force have been completed. The finite element analysis of the sandwich wall has been carried out by using Marc. The influence of the parameters on the bearing capacity and stiffness of the specimen was studied. The results of axial compression test show that the failure mode of sandwich wall is flexural failure, the axial compression capacity of sandwich wall can be calculated by the formula of axial compression capacity of reinforced concrete column. The axial compression capacity and axial stiffness of the sandwich wall increase with the increase of the thickness of the concrete layer, while the spacing of the intercalation wire has no effect on the axial compression capacity and the axial stiffness of the sandwich wall. The results of pseudostatic test show that the concrete and edge members of each layer of the specimen are a whole and can resist the vertical and horizontal forces together, and the vertical joint between the wall and the edge member is reliable. The sandwich wall specimens subjected to constant vertical force and reciprocating horizontal force have three failure modes: compression and bending failure, shear failure and bending shear failure. The ultimate displacement angle is more than 1 / 120, the elastic-plastic deformation ability meets the seismic requirements of shear wall structure, the ultimate displacement angle of shear failure or bending shear failure is less than 1 / 120, the elastoplastic deformation ability does not meet the seismic requirements of shear wall structure. The energy dissipation capacity of the compression and bending failure specimens is larger than that of the shear failure and shear failure specimens, and the strain distribution of the bottom cross section of the ultimate vertical steel bar is in accordance with the plane section assumption when the outermost vertical steel bar is subjected to tensile yield. The shear capacity of inclined section and flexural bearing capacity of normal section under axial pressure can be calculated by the formula of shear wall bearing capacity of reinforced concrete in current code. The results of finite element analysis and parameter analysis show that the numerical simulation results are in good agreement with the experimental results, and the bearing capacity and stiffness of the sandwich wall increase with the increase of axial compression ratio, strength and thickness of concrete. The steel wire strength has no effect on the stiffness of the sandwich wall; the wire mesh takes part in the shear resistance but does not participate in the bending resistance. The finite element analysis of 8 sandwich walls with different shear span ratio and steel mesh is carried out. The results show that the sandwich walls are all under compression and bending failure. With the increase of shear span ratio, the bearing capacity and stiffness of sandwich wall decrease, and the peak displacement and displacement angle increase. Based on the results of test and finite element analysis, it is suggested that the sandwich wall of sprayed concrete should be designed according to the principle of strong shear and weak bending, which can be used as a reference for practical engineering design.
【學(xué)位授予單位】：清華大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU352.11

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