鋼板剪力墻抗震性能非線性分析
發(fā)布時間：2018-08-14 08:50
【摘要】：鋼板剪力墻結(jié)構(gòu)由主要承擔豎向荷載的邊緣框架和主要承擔水平荷載的內(nèi)嵌鋼板組成,它充分利用了框架結(jié)構(gòu)和內(nèi)嵌鋼板的優(yōu)點,能夠使兩者協(xié)同工作。鋼板剪力墻結(jié)構(gòu)因彈性剛度大、抗震性能優(yōu)良、結(jié)構(gòu)自重小、施工速度快等優(yōu)點,在國內(nèi)外得到了廣泛的研究和應(yīng)用。本文基于非線性有限元軟件ABAQUS采用組合本構(gòu)關(guān)系對鋼板剪力墻抗震性能進行了非線性分析,通過參數(shù)化分析來確定各個參數(shù)對鋼板剪力墻抗震性能的影響,為鋼板剪力墻的實際應(yīng)用提供一定的參考。本文的主要研究內(nèi)容和結(jié)論如下:(1)對鋼板剪力墻進行了受力分析,得出了內(nèi)嵌鋼板極限承載力的理論計算公式及邊緣框架柱的最小剛度要求。(2)本文基于已有的鋼板剪力墻擬靜力試驗,采用有限元軟件對試驗試件進行了模擬,得到了模型的骨架曲線、滯回曲線、破壞形態(tài),對模型的承載力性能、延性性能、滯回性能、破壞形態(tài)等進行了研究。對比分析表明,數(shù)值模擬結(jié)果與試驗結(jié)果吻合的很好,為后續(xù)進行更深入的參數(shù)化分析奠定了基礎(chǔ)。(3)對鋼板剪力墻進行了單調(diào)加載分析,設(shè)計了三個參數(shù)(開洞率、高厚比、軸壓比)進行參數(shù)化分析。分別得到了荷載-位移曲線、面外變形圖、應(yīng)力云圖,分析了各個系列試件的承載能力性能,變形和應(yīng)力發(fā)展規(guī)律。研究表明:開洞率或高厚比越大,結(jié)構(gòu)的屈服荷載和極限承載力越小,內(nèi)嵌鋼板應(yīng)力值越大,延性越好,而軸壓比越大,結(jié)構(gòu)的屈服荷載、極限承載力、延性越小;三個參數(shù)下內(nèi)嵌鋼板面均正反向交替出現(xiàn)帶狀屈曲波;實際工程中建議開洞率在30%以下為宜,高厚比在300到400之間為宜。(4)對鋼板剪力墻進行了三參數(shù)下循環(huán)加載分析。對比分析了各個參數(shù)下結(jié)構(gòu)的滯回曲線、骨架曲線、剛度退化、承載力退化、耗能性能來揭示鋼板剪力墻的抗震性能。研究表明:開洞率、高厚比、軸壓比越大,零剛度現(xiàn)象越明顯,滯回環(huán)捏縮越嚴重;開洞使屈服位移(極限位移)提高的幅度大于相應(yīng)承載力降低的幅度;隨著內(nèi)嵌鋼板厚度的增加,屈服荷載(極限荷載)提高的幅度要大于相應(yīng)位移降低的幅度;三參數(shù)下各個試件均具有穩(wěn)定的承載力性能和良好的延性性能,不會發(fā)生因承載力驟然降低的脆性破壞;試件最終破壞時,不同開洞率的試件耗散的能量相差不多,但開洞率越大,能量耗散效率越高;高厚比越大,耗散的能量越多,但能量耗散效率變低;軸壓比增大會使試件耗散的能量大大減少,能量耗散的效率也會降低。
[Abstract]:The steel plate shear wall structure is composed of the edge frame which mainly bears the vertical load and the embedded steel plate which mainly bears the horizontal load. It makes full use of the advantages of the frame structure and the embedded steel plate and enables the two to work together. The steel plate shear wall structure has been widely studied and applied at home and abroad because of its advantages of large elastic stiffness, good seismic performance, low deadweight and fast construction speed. Based on the nonlinear finite element software ABAQUS, a nonlinear analysis of the seismic behavior of steel plate shear wall is carried out by using the combined constitutive relation, and the influence of each parameter on the seismic performance of the steel plate shear wall is determined by parameterized analysis. It provides a certain reference for the practical application of steel plate shear wall. The main contents and conclusions of this paper are as follows: (1) the stress analysis of steel plate shear wall is carried out. The theoretical calculation formula of ultimate bearing capacity of embedded steel plate and the minimum stiffness requirement of edge frame column are obtained. (2) based on the pseudo-static test of steel plate shear wall, the finite element software is used to simulate the test specimen. The skeleton curve, hysteretic curve and failure form of the model were obtained. The bearing capacity, ductility, hysteretic property and failure morphology of the model were studied. The comparative analysis shows that the numerical simulation results are in good agreement with the experimental results, which lays a foundation for further parameterized analysis. (3) the monotonic loading analysis of steel plate shear wall is carried out, and three parameters (opening ratio, ratio of height to thickness) are designed. The axial compression ratio) is used for parametric analysis. The load-displacement curve, out-of-plane deformation diagram and stress cloud diagram are obtained, respectively. The load-carrying capacity, deformation and stress development of each series of specimens are analyzed. The results show that the larger the opening ratio or the ratio of height to thickness, the smaller the yield load and ultimate bearing capacity of the structure, the greater the stress value of embedded steel plate, the better the ductility, but the greater the axial compression ratio, the smaller the yield load, ultimate bearing capacity and ductility of the structure. The strip buckling wave appears alternately in the front and backward direction of the inlay steel plate surface under three parameters, and it is suggested that the opening rate be less than 30% and the ratio of height to thickness be between 300 and 400 in practical engineering. (4) the cyclic loading analysis of steel plate shear wall with three parameters is carried out. The hysteretic curve, skeleton curve, stiffness degradation, bearing capacity degradation and energy dissipation performance of the structure under various parameters are compared and analyzed to reveal the seismic behavior of steel plate shear wall. The results show that the greater the ratio of hole opening, the higher the ratio of thickness to thickness, the greater the axial compression ratio, the more obvious the phenomenon of zero stiffness and the more serious the pinch of hysteresis loop, and the greater the yield displacement (ultimate displacement) is increased than the extent of the corresponding reduction of bearing capacity. With the increase of the thickness of embedded steel plate, the yield load (ultimate load) increases more than the corresponding displacement, and each specimen has stable bearing capacity and good ductility under three parameters. Brittle failure due to sudden reduction of bearing capacity will not occur. When the specimen is finally destroyed, the energy dissipation of specimens with different opening rates is not much, but the larger the opening rate, the higher the energy dissipation efficiency, and the greater the ratio of high to thickness, the more energy is dissipated. However, the energy dissipation efficiency is lower, and the energy dissipation and energy dissipation efficiency will be greatly reduced when the axial compression ratio increases.
【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
本文編號：2182306
[Abstract]:The steel plate shear wall structure is composed of the edge frame which mainly bears the vertical load and the embedded steel plate which mainly bears the horizontal load. It makes full use of the advantages of the frame structure and the embedded steel plate and enables the two to work together. The steel plate shear wall structure has been widely studied and applied at home and abroad because of its advantages of large elastic stiffness, good seismic performance, low deadweight and fast construction speed. Based on the nonlinear finite element software ABAQUS, a nonlinear analysis of the seismic behavior of steel plate shear wall is carried out by using the combined constitutive relation, and the influence of each parameter on the seismic performance of the steel plate shear wall is determined by parameterized analysis. It provides a certain reference for the practical application of steel plate shear wall. The main contents and conclusions of this paper are as follows: (1) the stress analysis of steel plate shear wall is carried out. The theoretical calculation formula of ultimate bearing capacity of embedded steel plate and the minimum stiffness requirement of edge frame column are obtained. (2) based on the pseudo-static test of steel plate shear wall, the finite element software is used to simulate the test specimen. The skeleton curve, hysteretic curve and failure form of the model were obtained. The bearing capacity, ductility, hysteretic property and failure morphology of the model were studied. The comparative analysis shows that the numerical simulation results are in good agreement with the experimental results, which lays a foundation for further parameterized analysis. (3) the monotonic loading analysis of steel plate shear wall is carried out, and three parameters (opening ratio, ratio of height to thickness) are designed. The axial compression ratio) is used for parametric analysis. The load-displacement curve, out-of-plane deformation diagram and stress cloud diagram are obtained, respectively. The load-carrying capacity, deformation and stress development of each series of specimens are analyzed. The results show that the larger the opening ratio or the ratio of height to thickness, the smaller the yield load and ultimate bearing capacity of the structure, the greater the stress value of embedded steel plate, the better the ductility, but the greater the axial compression ratio, the smaller the yield load, ultimate bearing capacity and ductility of the structure. The strip buckling wave appears alternately in the front and backward direction of the inlay steel plate surface under three parameters, and it is suggested that the opening rate be less than 30% and the ratio of height to thickness be between 300 and 400 in practical engineering. (4) the cyclic loading analysis of steel plate shear wall with three parameters is carried out. The hysteretic curve, skeleton curve, stiffness degradation, bearing capacity degradation and energy dissipation performance of the structure under various parameters are compared and analyzed to reveal the seismic behavior of steel plate shear wall. The results show that the greater the ratio of hole opening, the higher the ratio of thickness to thickness, the greater the axial compression ratio, the more obvious the phenomenon of zero stiffness and the more serious the pinch of hysteresis loop, and the greater the yield displacement (ultimate displacement) is increased than the extent of the corresponding reduction of bearing capacity. With the increase of the thickness of embedded steel plate, the yield load (ultimate load) increases more than the corresponding displacement, and each specimen has stable bearing capacity and good ductility under three parameters. Brittle failure due to sudden reduction of bearing capacity will not occur. When the specimen is finally destroyed, the energy dissipation of specimens with different opening rates is not much, but the larger the opening rate, the higher the energy dissipation efficiency, and the greater the ratio of high to thickness, the more energy is dissipated. However, the energy dissipation efficiency is lower, and the energy dissipation and energy dissipation efficiency will be greatly reduced when the axial compression ratio increases.
【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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