侧移刚度退化对高层R.C框架—剪力墙结构水平剪力重分布影响的仿真分析

发布时间：2019-03-15 16:45

【摘要】：框架剪力墙结构是由框架和剪力墙通过楼板结合在一起协同工作,此时,框架和剪力墙已经不能按照各自原有的变形方式来变化,呈现出来的变形是弯剪型变形特征。剪力墙结构的抗侧刚度相对框架结构大,所以,在框架剪力墙结构体系中,通常剪力墙承担了大部分的水平作用力,但当结构进入弹塑性工作阶段后,结构发生内力重分配,框架承担的水平力比值相对于弹性阶段的比值开始增大,然而比例到底增大多少至今尚无定论。我国《高规》9.1.11对此作出了做出了相关调整。但此调整方法是依靠工程经验而提出来的,因此需要完善。本文首先分别对一榀钢筋混凝土框架结构和一整体矮剪力墙结构试验进行有限元仿真分析,并与试验结果进行比较,从而验证三维实体退化虚拟层合单元理论及其程序的合理、有效性。然后,遵循二道防线的设计概念,分别选取单片剪力墙抗侧刚度退化最快,而单榀框架抗侧刚度退化最慢的轴压比,进行最不利刚度退化速率组合,构建三个不同刚度特征值即底部初始剪力比值不同的对称的“干净”的钢筋混凝土框架剪力墙结构。通过仿真分析,探讨框架剪力墙结构在水平荷载作用下的承载力、层间位移、各自抗侧刚度退化的情况、框架与剪力墙中剪力分配的变化和随楼层变化的规律。最后根据分析结果得出相关结论,并为工程实际设计提供参考。
[Abstract]:The frame shear wall structure is composed of a frame and a shear wall, and the frame and the shear wall can not be changed according to the original deformation mode, and the deformation of the frame and the shear wall can be changed according to the original deformation mode. The anti-lateral stiffness of the shear wall structure is relatively large, so, in the frame shear wall structure system, the shear wall bears most of the horizontal force, but when the structure enters the elastic-plastic working phase, the structure has the internal force redistribution, The ratio of the horizontal force ratio of the frame with respect to the elastic phase begins to increase, yet the proportion is not conclusive yet. Our country's 9.1.11 has made relevant adjustments to this. But this adjustment method is based on engineering experience, so it needs to be perfected. In this paper, a finite element simulation analysis of a reinforced concrete frame structure and an overall short shear wall structure test is carried out respectively, and compared with the test results, so as to verify the reasonable and effective method of the three-dimensional entity degradation virtual laminated unit theory and the program. then, according to the design concept of the two lines of defense, the resistance side stiffness of the single-piece shear wall is selected to be the fastest, and the axial compression ratio of the one-piece frame anti-side stiffness is the slowest, and the most unfavorable stiffness degradation rate combination is carried out, Three reinforced concrete frame shear wall structures with different stiffness characteristic values, i.e. different bottom initial shear ratios, are constructed. Through the simulation analysis, the bearing capacity, the interlayer displacement, the deformation of the lateral stiffness of the frame and the shear wall under the influence of the horizontal load, the change of the shear distribution in the frame and the shear wall and the law of the change of the floor are discussed. Finally, according to the results of the analysis, the relevant conclusions are drawn, and the reference for the practical design of the project is provided.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU973.16

【引证文献】