本文選題：鋼梁-混凝土剪力墻節(jié)點 + 剛性連接��； 參考：《西安科技大學》2017年碩士論文

【摘要】：鋼梁-混凝土剪力墻節(jié)點是混合結(jié)構(gòu)中受力的關(guān)鍵部位,目前,對剛性節(jié)點連接的鋼梁-混凝土剪力墻節(jié)點抗震性能的研究尚不夠充分,本文分別對平面外和平面內(nèi)的鋼梁-混凝土剪力墻剛性節(jié)點抗震性能進行研究,分析其在單調(diào)荷載和循環(huán)往復荷載下的變形與受力性能,本文的研究內(nèi)容及結(jié)論如下:1.本文利用ABAQUS有限元軟件分別建立平面內(nèi)和平面外節(jié)點模型,其中型鋼和混凝土選用實體單元,鋼筋采用二維線性單元。鋼材采用理想的彈塑性三折線模型,混凝土采用塑性損傷模型,荷載加載制度以位移加載控制,分別施加單調(diào)荷載和低周循環(huán)往復荷載,為獲得節(jié)點的非線性受力過程提供有效分析手段。2.通過改變平面外鋼梁-混凝土剪力墻節(jié)點的剪力墻厚度、剪力墻軸壓比、剪力墻混凝土強度等級三個參數(shù),根據(jù)有限元模擬結(jié)果對比荷載-位移曲線、節(jié)點滯回曲線、剛度退化曲線、骨架曲線,計算節(jié)點的延性系數(shù)、等效粘滯系數(shù)和能量耗散系數(shù),分析總結(jié)平面外剛性節(jié)點受力特點和抗震性能變化規(guī)律。3.通過改變平面內(nèi)鋼梁-混凝土剪力墻節(jié)點的參數(shù)(剪力墻厚度、剪力墻軸壓比、剪力墻混凝土強度等級)根據(jù)有限元模擬加載結(jié)果,通過對比分析,總結(jié)各參數(shù)對平面內(nèi)剛性節(jié)點抗震性能的影響規(guī)律。經(jīng)過分析得出:鋼梁-混凝土剪力墻剛性節(jié)點在單調(diào)荷載作用下具備較高承載力,在低周反復循環(huán)荷載下節(jié)點螺栓連接處有應力集中現(xiàn)象。平面外、平面內(nèi)剛性節(jié)點滯回曲線比較飽滿,抗震性能較好。平面外剛性節(jié)點的等效粘滯系數(shù)為0.2-0.24,平面內(nèi)剛性節(jié)點的等效粘滯系數(shù)為0.18-0.23,表明平面外、平面內(nèi)剛性節(jié)點均具有良好的耗能能力。在平面內(nèi)試件和平面外試件模擬中,提高混凝土的強度等級或者增大混凝土剪力墻的軸壓比或者增大剪力墻厚度,試件的等效粘滯系數(shù)均不同程度的降低。
[Abstract]:The steel beam-concrete shear wall joint is the key part of the hybrid structure. At present, the seismic behavior of the steel beam-concrete shear wall joint connected with rigid joint is not enough. In this paper, the seismic behavior of rigid joints of steel beam-concrete shear walls outside plane and in plane is studied, and its deformation and mechanical behavior under monotone load and cyclic load are analyzed. The contents and conclusions of this paper are as follows: 1. In this paper, ABAQUS finite element software is used to establish in-plane and out-of-plane joint models, in which solid element is used for steel and concrete, and two-dimensional linear element is used for reinforcing bar. The ideal elastic-plastic three-fold model is used for steel, the plastic damage model is used for concrete, the load loading system is controlled by displacement loading, and the monotone load and low-cycle cyclic load are applied respectively. It provides an effective analysis method to obtain the nonlinear force process of the joint. 2. 2. By changing the thickness of shear wall, the axial compression ratio of shear wall, and the strength grade of shear wall concrete, the load-displacement curve and hysteretic curve of joint are compared according to the results of finite element simulation. Stiffness degradation curve, skeleton curve, ductility coefficient, equivalent viscosity coefficient and energy dissipation coefficient of joints are calculated. By changing the parameters of steel beam-concrete shear wall joints (shear wall thickness, shear wall axial compression ratio, shear wall concrete strength grade) according to finite element simulation loading results, The influence of various parameters on the seismic behavior of rigid joints in plane is summarized. It is concluded that the rigid joints of steel beam-concrete shear walls have high bearing capacity under monotonic load and stress concentration at the joint bolt joints under low cyclic loading. Outside the plane, the hysteretic curve of the rigid joints in the plane is relatively full and the seismic performance is better. The equivalent viscosity coefficient of out-of-plane rigid joints is 0.2-0.24, and that of in-plane rigid joints is 0.18-0.23, which indicates that both off-plane and in-plane rigid joints have good energy dissipation capacity. In the simulation of in-plane and outer-plane specimens, the equivalent viscosity coefficient of the specimens decreases in varying degrees by increasing the strength grade of concrete, increasing the axial compression ratio of concrete shear walls or increasing the thickness of shear walls.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU398.2;TU352.11

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本文編號：1913385