平齐端板连接的半刚性框架—钢板剪力墙性能研究

发布时间：2018-10-23 17:03

【摘要】：钢板剪力墙结构由内填钢板和框架梁柱组成,具有初始侧向刚度大,滞回性能稳定,耗能能力良好,延性大等优点,是多高层钢结构建筑中经济、高效的抗侧力结构体系。目前对该体系的分析都是基于梁柱刚接或铰接的假定,但大量的研究已经证明,工程中节点的实际性能是介于两种情况之间的半刚性连接,而节点的柔性将会对结构的内力、位移和稳定等性能产生相应的影响,因此对半刚性框架——钢板剪力墙体系进行研究是很有实际意义的。平齐端板作为一种典型的半刚性连接形式,构造简单,施工快捷,同时可以改善结构的耗能和延性,本文首次将平齐端板连接的半刚性钢框架与不同形式的钢板剪力墙相结合,形成新的结构体系形式,既可以发挥钢板剪力墙的延性和刚度,又可以利用半刚性框架的延性。通过试验研究与有限元分析相结合的方法,本文系统地评估了该新型结构的整体性能。主要研究内容如下:1)对三榀平齐端板连接的单跨二层的半刚性框架——钢板剪力墙结构进行了低周反复荷载的拟静力试验研究,从耗能能力,承载力,延性,应力分布,墙板协同工作机理等方面揭示了该体系的内力转换和耗能机理。2)研究了平齐端板连接的半刚性框架——钢板剪力墙新型结构体系的受力机理和破坏模式,分析了当钢板墙采用三种不同形式(非加劲薄板、十字加劲板、斜加劲板)时对整体结构的承载力、滞回性能、墙板应力和变形发展的影响。3)采用SHELL181单元模拟钢板墙,Combin39弹簧单元模拟半刚性节点,通过ANSYS有限元软件计算了薄钢板墙、十字加劲钢板墙、斜加劲钢板墙三种试件在单向荷载和循环荷载作用下的应力与变形发展,通过与试验结果对比,证实了该有限元模型可以准确地模拟半刚接框架——钢板剪力墙结构的屈曲后性能,是一种有效的数值分析手段。4)应用ANSYS有限元程序对平齐端板连接的半刚性框架-钢板剪力墙体系进ii行变参数分析,分析钢板墙厚度、边框架柱截面惯性矩和加劲肋截面惯性矩对结构整体性能的影响。5)根据KishiChen幂函数模型计算平齐端板连接的弯矩-转角关系曲线,在此基础上,对比试验中采用不同半刚性节点连接(栓焊连接、平齐端板连接和双腹板顶底角钢连接)时试件的整体受力性能,此外,采用ANSYS有限元软件,分析节点铰接、半刚接、刚性连接对非加劲、十字加劲、斜加劲三种钢板剪力墙结构极限承载力的影响。通过上述研究表明,半刚性框架——钢板剪力墙结构具有优秀的抗侧力性能,通过研究该体系的各项性能,可以为日后的工程实践提供理论依据。
[Abstract]:The steel plate shear wall structure is composed of inner filled steel plate and frame Liang Zhu. It has the advantages of high initial lateral stiffness, stable hysteretic performance, good energy dissipation ability and large ductility. It is an economical and efficient lateral force resisting structure system in many high-rise steel structures. At present, the analysis of the system is based on the assumption of Liang Zhu rigid connection or hinge connection, but a large number of studies have proved that the actual performance of the joint in engineering is a semi-rigid connection between the two cases, and the flexibility of the joint will affect the internal force of the structure. Displacement and stability have a corresponding effect, so it is very important to study the semi-rigid frame-steel plate shear wall system. As a typical semi-rigid connection form, the flat end plate is simple in construction, quick in construction, and can improve the energy dissipation and ductility of the structure. In this paper, the semi-rigid steel frame connected with the horizontal end plate is first combined with different forms of steel plate shear wall. The new structural system can not only give play to the ductility and stiffness of steel plate shear wall, but also make use of the ductility of semi-rigid frame. In this paper, the overall performance of the new structure is systematically evaluated by combining the experimental research with finite element analysis. The main research contents are as follows: 1) the quasi-static test of three single-span and two-story semi-rigid frame-steel shear wall structures with flat end plate connection under low cyclic loading is carried out, and the energy dissipation capacity, bearing capacity, ductility, stress distribution are analyzed. The mechanism of internal force conversion and energy dissipation of the system is revealed in terms of the working mechanism of wall panels. 2) the mechanical mechanism and failure mode of a new type of steel plate shear wall structure system, which is a semi-rigid frame-steel shear wall with flat end plate connection, is studied. The load-carrying capacity and hysteretic behavior of the whole structure are analyzed when the steel plate wall adopts three different forms (non-stiffened plate, cross-stiffened plate and inclined stiffened plate). 3) SHELL181 element is used to simulate the steel plate wall, and Combin39 spring element is used to simulate the semi-rigid joint. The thin steel plate wall and the cross stiffened steel plate wall are calculated by ANSYS finite element software. The stress and deformation development of three kinds of specimens of inclined stiffened steel plate wall under unidirectional and cyclic loads are compared with the test results. It is proved that the finite element model can accurately simulate the post-buckling behavior of semi-rigid frame-steel shear wall structures. It is an effective method for numerical analysis. 4) the ANSYS finite element program is used to analyze the variable parameters of the semi-rigid frame-steel shear wall system with horizontal end plate connection, and the thickness of the steel plate wall is analyzed. The influence of moment of inertia of column section and moment of inertia of stiffened rib section on the overall performance of the structure. 5) based on the KishiChen power function model, the moment-angle curve of flat end-plate connection is calculated. The overall mechanical properties of the specimens are analyzed by using ANSYS finite element software when different semi-rigid joints (butt welding, flat end plate connection and double web top and bottom angle steel connection) are used to analyze the joint hinge and semi-rigid connection. The influence of rigid connection on the ultimate bearing capacity of three kinds of steel plate shear wall structures: non-stiffening, cross-stiffening and oblique stiffening. The above research shows that the semi-rigid frame-steel plate shear wall structure has excellent lateral force resistance, and the study of the performance of the system can provide a theoretical basis for the engineering practice in the future.
【学位授予单位】：西安建筑科技大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TU398.2

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