钢板剪力墙抗震性能非线性分析
发布时间：2018-08-14 08:50
【摘要】：钢板剪力墙结构由主要承担竖向荷载的边缘框架和主要承担水平荷载的内嵌钢板组成,它充分利用了框架结构和内嵌钢板的优点,能够使两者协同工作。钢板剪力墙结构因弹性刚度大、抗震性能优良、结构自重小、施工速度快等优点,在国内外得到了广泛的研究和应用。本文基于非线性有限元软件ABAQUS采用组合本构关系对钢板剪力墙抗震性能进行了非线性分析,通过参数化分析来确定各个参数对钢板剪力墙抗震性能的影响,为钢板剪力墙的实际应用提供一定的参考。本文的主要研究内容和结论如下:(1)对钢板剪力墙进行了受力分析,得出了内嵌钢板极限承载力的理论计算公式及边缘框架柱的最小刚度要求。(2)本文基于已有的钢板剪力墙拟静力试验,采用有限元软件对试验试件进行了模拟,得到了模型的骨架曲线、滞回曲线、破坏形态,对模型的承载力性能、延性性能、滞回性能、破坏形态等进行了研究。对比分析表明,数值模拟结果与试验结果吻合的很好,为后续进行更深入的参数化分析奠定了基础。(3)对钢板剪力墙进行了单调加载分析,设计了三个参数(开洞率、高厚比、轴压比)进行参数化分析。分别得到了荷载-位移曲线、面外变形图、应力云图,分析了各个系列试件的承载能力性能,变形和应力发展规律。研究表明:开洞率或高厚比越大,结构的屈服荷载和极限承载力越小,内嵌钢板应力值越大,延性越好,而轴压比越大,结构的屈服荷载、极限承载力、延性越小;三个参数下内嵌钢板面均正反向交替出现带状屈曲波;实际工程中建议开洞率在30%以下为宜,高厚比在300到400之间为宜。(4)对钢板剪力墙进行了三参数下循环加载分析。对比分析了各个参数下结构的滞回曲线、骨架曲线、刚度退化、承载力退化、耗能性能来揭示钢板剪力墙的抗震性能。研究表明:开洞率、高厚比、轴压比越大,零刚度现象越明显,滞回环捏缩越严重;开洞使屈服位移(极限位移)提高的幅度大于相应承载力降低的幅度;随着内嵌钢板厚度的增加,屈服荷载(极限荷载)提高的幅度要大于相应位移降低的幅度;三参数下各个试件均具有稳定的承载力性能和良好的延性性能,不会发生因承载力骤然降低的脆性破坏;试件最终破坏时,不同开洞率的试件耗散的能量相差不多,但开洞率越大,能量耗散效率越高;高厚比越大,耗散的能量越多,但能量耗散效率变低;轴压比增大会使试件耗散的能量大大减少,能量耗散的效率也会降低。
[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.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.2;TU352.11
本文编号：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.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.2;TU352.11
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