两边连接钢板剪力墙结构性能分析

发布时间：2018-07-18 13:24

【摘要】：两边连接钢板剪力墙其构造特点为内嵌钢板只与边框梁相连,与四边连接钢板墙相比,这样的构造特点消除了四边连接内嵌钢板对柱产生的额外附加弯矩和轴力的不利影响,避免了框架柱的过早破坏;当边框柱为钢管混凝土柱、型钢混凝土柱等组合构件时,采用钢板两边连接的方式可以解决内嵌钢板与边框柱连接的施工困难。除此之外,在旧建筑的抗震加固中,采用两边连接的内嵌钢板也更为方便。本文首先提出两边连接钢板剪力墙基于构件承载能力的设计方法,通过设计算例和有限元模拟分析验证设计方法的正确性;在此基础上,设计了9个不同层数、不同跨度的两边连接钢板剪力墙结构,利用ABAQUS软件建立有限元模型,进行静力推覆分析,研究层数和跨度对结构性能的影响;最后设计了一个钢框架-两边连接钢板墙结构,对其进行小震、中震和大震下的时程分析,考察结构变形情况,基底剪力分布和破坏机理。以上研究结果表明,层数相同的模型,钢板跨度越小,所需钢板厚度就越大,导致边缘构件尺寸增大,使模型在钢板屈服后仍有较大的承载能力,刚度下降较缓慢,但内嵌钢板抗剪能力发挥不充分,分配到的基底剪力相对较少,另外还会导致边框柱轴力增大;层数越多,跨度越小,模型的弯曲作用就越明显,导致结构上部钢板不易屈服,也使结构不够经济。在框架结构中设置两边连接的钢板可以显著提高结构刚度,减小结构变形。设计合理的钢框架-两边连接钢板剪力墙结构在小震作用下,构件均保持弹性;中震作用下,钢板屈服,边缘框架保持弹性;大震作用下,钢板屈服,梁端和柱脚进入塑性,符合结构抗震设计的性能目标。
[Abstract]:The structural characteristics of the steel plate shear wall connected on both sides are that the embedded steel plate is only connected to the frame beam. Compared with the steel plate wall connected with the four sides, this kind of structural feature eliminates the adverse effect of the additional moment and axial force on the column caused by the steel plate embedded in the four sides. When the frame column is composed of concrete-filled steel tubular column and steel reinforced concrete column, the construction difficulty of the connection between the inlaid steel plate and the frame column can be solved by adopting the method of connecting the steel plate with the two sides of the steel plate. In addition, in the seismic reinforcement of the old building, it is more convenient to use the embedded steel plate connected both sides. In this paper, a design method based on the load-carrying capacity of steel plate shear wall is put forward, and the correctness of the design method is verified by the design example and finite element simulation analysis. On this basis, nine different layers are designed. The finite element model of steel plate shear wall structure with different span is established by Abaqus software, and the influence of story number and span on the structure performance is studied. Finally, a steel frame-steel plate wall structure is designed. The time-history analysis of small earthquake, moderate earthquake and large earthquake is carried out to investigate the deformation of the structure, the distribution of the base shear force and the failure mechanism. The above results show that the smaller the span of steel plate, the greater the thickness of steel plate, which leads to the increase of the size of edge member, which makes the model still have larger bearing capacity after the yield of steel plate, and the stiffness decreases slowly. However, the shear resistance of embedded steel plate is inadequate, the distribution of base shear force is relatively small, in addition, the axial force of frame column will increase; the more layers, the smaller the span, the more obvious the bending action of the model is, which leads to the steel plate of the upper part of the structure is not easy to yield. It also makes the structure uneconomical. The steel plate connected with both sides in the frame structure can significantly improve the stiffness of the structure and reduce the deformation of the structure. Reasonably designed steel frame-Shear wall structures with steel plates connected on both sides remain elastic under small earthquakes; steel plates yield under moderate earthquake, and frame edges remain elastic; under strong earthquakes, steel plates yield, and beam ends and column feet enter into plasticity. Accord with the performance target of seismic design of structure.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.16

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