本文關(guān)鍵詞： 疊合板式剪力墻 新舊混凝土結(jié)合面 受彎性能 數(shù)值模擬 參數(shù)分析　出處：《煙臺(tái)大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：推進(jìn)我國(guó)建筑工業(yè)化發(fā)展的核心任務(wù)是開(kāi)發(fā)契合我國(guó)建筑工業(yè)化發(fā)展的結(jié)構(gòu)體系。預(yù)制混凝土疊合板式剪力墻為半預(yù)制裝配式剪力墻結(jié)構(gòu),是鋼筋混凝土剪力墻結(jié)構(gòu)體系由現(xiàn)場(chǎng)澆筑到完全裝配的過(guò)渡。預(yù)制混凝土疊合板式剪力墻結(jié)構(gòu)具有裝配程度高、建造質(zhì)量好、環(huán)保節(jié)能、取代傳統(tǒng)模板的優(yōu)點(diǎn),符合建筑工業(yè)化的發(fā)展要求。本文提出了一種無(wú)界面鋼筋的新型疊合板式剪力墻結(jié)構(gòu),該結(jié)構(gòu)的兩側(cè)為預(yù)制混凝土墻板,預(yù)制板中間空隙內(nèi)澆筑混凝土形成整體結(jié)構(gòu)。兩側(cè)預(yù)制板間無(wú)界面鋼筋,內(nèi)部存在的新舊混凝土結(jié)合面是墻體受力的薄弱環(huán)節(jié),其連接性能決定了墻體的受力性能。本文對(duì)該新型墻體開(kāi)展了試驗(yàn)研究和數(shù)值分析,對(duì)新舊混凝土結(jié)合面的受力性能和界面構(gòu)造進(jìn)行了詳細(xì)分析,主要研究成果如下:(1)完成了3片新型疊合板式剪力墻試件在恒定軸力作用下的擬靜力試驗(yàn),得到了新型疊合板式剪力墻的破壞過(guò)程和破壞形態(tài)。試驗(yàn)結(jié)果表明:在正常使用狀態(tài)下,新舊混凝土結(jié)合面粘結(jié)良好,能夠保證墻體整體受力;墻體均發(fā)生彎曲破壞,即邊緣縱筋屈服;根部混凝土壓潰。(2)通過(guò)分析各試件的滯回性能、骨架曲線(xiàn)、承載力、剛度和變形等性能指標(biāo),研究了邊緣縱筋配筋率、界面構(gòu)造等參數(shù)對(duì)新型疊合板式剪力墻受彎性能的影響。結(jié)果表明:邊緣縱筋配筋率是影響疊合板式剪力墻受彎性能的重要因素,隨邊緣縱筋配筋率的提高,墻體的受彎承載力和耗能能力顯著提高,剛度退化速度減緩,新舊混凝土間的相對(duì)變形減小;粗糙面及鍵槽構(gòu)造兩種界面處理方式均可保證墻體正常使用條件下的整體性能,但鍵槽構(gòu)造能夠提高墻體耗能能力,延緩墻體的破壞進(jìn)程;對(duì)墻體峰值荷載后的穩(wěn)定性產(chǎn)生有利作用。(3)基于有限元軟件ABAQUS,建立了新型疊合板式剪力墻的數(shù)值分析模型,采用庫(kù)倫摩擦模型和內(nèi)聚力模型相結(jié)合的方式對(duì)新舊混凝土結(jié)合面進(jìn)行了數(shù)值模擬,分析了墻體的破壞形態(tài)、骨架曲線(xiàn)、新舊混凝土界面處的相對(duì)變形等關(guān)鍵指標(biāo),結(jié)果表明,采用庫(kù)倫摩擦模型和內(nèi)聚力模型相結(jié)合的方式可對(duì)新型疊合板式剪力墻進(jìn)行數(shù)值模擬,模型合理,結(jié)果可靠。(4)本文還對(duì)新型疊合板式剪力墻進(jìn)行有限元參數(shù)擴(kuò)展分析,研究了插筋配筋率、邊緣縱筋配筋率、軸壓比等關(guān)鍵參數(shù)對(duì)墻體受力性能的影響,結(jié)果表明:插筋配筋率對(duì)墻體承載力和剛度影響較小,但提高插筋配筋率,可改善墻體的延性;邊緣縱筋配筋率對(duì)墻體的承載力和剛度影響較大,隨著邊緣縱筋配筋率的提高,墻體的承載力和初始剛度增大,延性提高;軸壓比對(duì)墻體承載力和剛度影響顯著,隨軸壓比的提高,墻體承載力和初始剛度大幅度增大,而延性降低。
[Abstract]:The core task of promoting the development of building industrialization in China is to develop the structure system which is suitable for the development of building industrialization in our country. The prefabricated concrete laminated slab shear wall is semi-prefabricated prefabricated shear wall structure. Precast concrete laminated slab shear wall structure has the advantages of high assembly level, good construction quality, environmental protection and energy saving, replacing traditional formwork. In this paper, a new type of laminated slab shear wall structure without interface reinforcement is proposed. The two sides of the structure are precast concrete wall slabs. There is no interfacial reinforcement between the two prefabricated boards, and the existing new and old concrete joint surface is the weak link of the wall force. The connection performance of the wall determines the mechanical performance of the wall. In this paper, the experimental study and numerical analysis of the new wall are carried out, and the mechanical properties and interface structure of the new and old concrete joints are analyzed in detail. The main research results are as follows: (1) Quasi-static test of three new laminated plate shear wall specimens under constant axial force is completed. The failure process and failure pattern of the new type composite slab shear wall are obtained. The experimental results show that the new and old concrete joints are bonded well in normal service, which can ensure the integral force of the wall. Bending failure occurs in all the walls, that is, the longitudinal tendons yield at the edge; By analyzing the hysteretic performance, skeleton curve, bearing capacity, stiffness and deformation of each specimen, the reinforcement ratio of longitudinal reinforcement on the edge was studied. The effect of interface structure and other parameters on the flexural behavior of the new type laminated plate shear wall is studied. The results show that the reinforcement ratio of the edge longitudinal reinforcement is an important factor affecting the flexural performance of the laminated plate shear wall, and with the increase of the reinforcement ratio of the edge longitudinal reinforcement. The flexural bearing capacity and energy dissipation capacity of the wall are improved significantly, the stiffness degradation rate is slowed down, and the relative deformation between the new and old concrete is reduced. Rough surface and keyway construction can guarantee the whole performance of the wall under normal service condition, but the keyway construction can improve the energy dissipation capacity of the wall and delay the failure process of the wall. Based on the finite element software Abaqus, the numerical analysis model of a new type of laminated plate shear wall is established. The combination of Coulomb friction model and cohesive force model is used to simulate the new and old concrete joints, and the failure form and skeleton curve of the wall are analyzed. The results show that the combination of Coulomb friction model and cohesive force model can be used to simulate the new composite plate shear wall, and the model is reasonable. Results reliable. 4) in this paper, the finite element parameter expansion analysis of the new type laminated plate shear wall is carried out, and the influence of the key parameters, such as the reinforcement ratio of the inserted bar, the ratio of longitudinal reinforcement on the edge and the ratio of axial compression, on the mechanical properties of the wall are studied. The results show that the reinforcement ratio has little effect on the bearing capacity and stiffness of the wall, but the ductility of the wall can be improved by increasing the reinforcement ratio. The reinforcement ratio of longitudinal reinforcement on the edge has a great influence on the bearing capacity and stiffness of the wall. With the increase of the reinforcement ratio of the longitudinal reinforcement on the edge, the bearing capacity and initial stiffness of the wall increase, and the ductility of the wall increases. The axial compression ratio has a significant effect on the bearing capacity and stiffness of the wall. With the increase of axial compression ratio, the bearing capacity and initial stiffness of the wall increase greatly, while the ductility decreases.
【學(xué)位授予單位】：煙臺(tái)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TU398.2

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