带拉结筋的内配钢板混凝土剪力墙非线性有限元分析

发布时间：2019-03-13 11:57

【摘要】：在高层和超高层建筑结构底部加强部位,为了解决普通混凝土剪力墙抗侧刚度和强度不足的问题,提出了一种将钢板内配于钢筋混凝土剪力墙中的新型组合剪力墙。这种内配钢板混凝土剪力墙,既提高了剪力墙的抗剪承载力,有效减小墙厚,又避免了纯钢板剪力墙受剪时容易发生平面外屈曲的现象,充分发挥钢板剪力墙和钢筋混凝土剪力墙的优势。钢板与混凝土的粘结是通过在钢板上规则的布置抗剪连接件来实现,常用的抗剪连接件有栓钉和拉结筋。由于国内外有关如何布置抗剪连接件以提高内配钢板R.C.剪力墙的受力性能的研究很少,尤其是拉结筋,故本文着重以拉结筋为侧重点,对其如何影响内配钢板R.C.剪力墙受力性能,如何影响钢板与混凝土的组合作用进行深入研究。(1)本文总结了9个分别带有栓钉、拉结筋抗剪连接件和无抗剪连接件的内配钢板R.C.剪力墙试件的试验结果,对比分析其骨架曲线、刚度退化曲线和延性系数,研究栓钉和拉结筋两种抗剪连接件对内配钢板R.C.剪力墙抗震性能的影响。(2)以4个带拉结筋的内配钢板R.C.剪力墙为参照,采用ABAQUS有限元分析软件,建立不同参数的有限元模型,分析钢板厚度,拉结筋直径,拉结筋间距,轴压比等参数对内配钢板R.C.剪力墙受力性能和剪切变形的影响。(3)为了避免钢板发生局部平面外屈曲,同时保证钢板与混凝土间的共同工作。本文以压杆稳定问题为参照,通过线性扰动分析获得钢板局部长厚比对钢板局部屈曲的影响规律,拟合出钢板局部长厚比与钢板局部屈曲临界应力的函数关系。为了研究钢板与混凝土的组合作用程度,提出内配钢板R.C.剪力墙中钢板与混凝土组合作用率的概念和计算方法,按高宽比为2和1.5不同,将内配钢板R.C.剪力墙有限元模型分为两组,研究不同高宽比的内配钢板R.C.剪力墙中钢板局部长厚比与组合作用率的关系,为工程中如何设计拉结筋提供了定量设计参数。
[Abstract]:In order to solve the problem of insufficient lateral stiffness and strength of ordinary concrete shear wall, a new type of composite shear wall with steel plate in reinforced concrete shear wall is put forward in the bottom of high-rise and super-high-rise buildings. This kind of steel plate concrete shear wall not only increases the shear capacity of the shear wall, effectively reduces the wall thickness, but also avoids the phenomenon of out-of-plane buckling of the pure steel plate shear wall when it is subjected to shear. Make full use of the advantages of steel plate shear wall and reinforced concrete shear wall. The bond between steel plate and concrete is realized by regular arrangement of shear joint on steel plate. The commonly used shear joint is stud and tension bar. As a result of the domestic and foreign concerned about how to arrange the shear joint to improve the internal plate R.C. The research on the mechanical behavior of shear wall is very few, especially the tensile reinforcement, so this paper focuses on the tensile reinforcement, and how to influence the internal steel plate R.C. The mechanical behavior of shear wall and how to affect the combination of steel plate and concrete are deeply studied. (1) in this paper, nine internal steel plates R.C. With stud, tension reinforcement and no shear joint are summarized in this paper. The test results of shear wall specimens are compared and analyzed, and the skeleton curve, stiffness degradation curve and ductility coefficient of shear wall specimens are compared and analyzed, and two kinds of shear joints, stud and tensile steel plate R.C., are studied. (2) four internal steel plates with tensile reinforcement R.C. The finite element model with different parameters was established by using ABAQUS finite element analysis software. The parameters such as steel plate thickness, tensile reinforcement diameter, tensile bar spacing, axial compression ratio and other parameters were analyzed. The influence of shear wall behavior and shear deformation. (3) in order to avoid local out-of-plane buckling of steel plate and ensure the joint work between steel plate and concrete. In this paper, according to the stability problem of compression bar, the influence of the thickness ratio of local minister on the local buckling of steel plate is obtained by linear perturbation analysis, and the function relation between the thickness ratio of local minister of steel plate and the critical stress of local buckling of steel plate is fitted. In order to study the degree of interaction between steel plate and concrete, R.C. The concept and calculation method of steel plate-concrete combination rate in shear wall are different according to the ratio of height to width of 2 and 1.5. The internal steel plate R.C. The finite element model of shear wall is divided into two groups. The relationship between the thickness ratio and the combined action ratio of the steel plate in shear wall provides the quantitative design parameters for how to design the tensioning bars in the engineering.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU398.2

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