屈服耗能隔墙的减震性能研究

发布时间：2019-02-21 13:25

【摘要】：在地震作用下,建筑结构会产生变形,相对于结构构件,其中的非结构构件如隔墙、填充墙等墙体由于刚度较低,整体性和变形能力差,无法产生与之相协调的变形,在地震作用下容易发生破坏,甚至垮塌,从而造成严重的人员伤亡和巨大的经济的损失。因此,在加强主体结构构件抗震性能的同时,改善非结构构件的抗震性能也显得尤为重要。消能减震技术是近年来迅速发展起来的一种安全、有效、经济的工程抗震方法。这种方法彻底改变传统“强化”结构的抗震思路,通过把结构的某些结构构件设计成耗能元件,通过摩擦、剪切变形来消耗地震能量,以减小主体结构的地震反应或减轻其破坏,达到减震控制的目的。本文旨在把结构构件消能减震的思想引入非结构构件,研究一种屈服耗能隔墙,隔墙内设置耗能软钢片,将输入结构中的震能吸收、耗散,从而保护主体结构的安全。本文首先分别对含有3,4,5片软钢片的三组试验构件按照一定的位移幅值进行反复加载,在加载过程中,观察软钢片的屈服变形,同时获取各组试件滞回曲线数据。然后,利用IDARC程序用柱单元对隔墙进行模拟。通过对模拟数据和试验数据的拟合,分析得出软钢片的数量与IDARC软件中滞回模型初始抗弯刚度、屈服后抗弯刚度参数的关系。最后,将含有不同数量软钢片的隔墙以底层每跨和每层每跨两种分布方式分别布置在3层3跨和6层3跨两个框架算例中来分析隔墙在框架中的减震作用。通过对比算例框架在地震作用下的最大层间位移、最大层间剪力、自振周期、出铰模式以及损伤指数,发现隔墙具有较好的减震作用,隔墙含有的软钢片数量越多,抗震性越强。框架中每层布置隔墙方案的减震效果要优于仅在底层布置隔墙的方案。
[Abstract]:Under the action of earthquake, the building structure will be deformed. Compared with the structural members, the non-structural members, such as partition wall, infilled wall and other walls, can not produce coordinated deformation because of their low stiffness, poor integrity and poor deformation capacity. It is easy to destroy or even collapse under earthquake, resulting in serious casualties and huge economic losses. Therefore, it is very important to improve the seismic performance of non-structural members while strengthening the seismic performance of the main structural members. Energy dissipation and damping technology is a safe, effective and economical seismic method developed rapidly in recent years. This method completely changes the aseismic thought of traditional "strengthened" structure. By designing some structural components of the structure into energy-consuming elements, the seismic energy is consumed by friction and shear deformation. In order to reduce the seismic response or reduce the damage of the main structure, the purpose of earthquake absorption and control is achieved. The purpose of this paper is to introduce the idea of energy dissipation and damping of structural members into non-structural members, and to study a kind of yielding energy dissipation partition wall, which is equipped with energy dissipation soft steel sheet, which absorbs and dissipates the shock energy in the input structure, thus protecting the safety of the main structure. In this paper, three groups of test members containing 3 ~ 4 ~ 4 ~ 5 soft steel sheets are subjected to repeated loading according to a certain displacement amplitude. In the process of loading, the yield deformation of soft steel sheet is observed, and the hysteresis curve data of each group of specimens are obtained at the same time. Then, IDARC program is used to simulate the partition wall with column element. By fitting the simulation data and test data, the relationship between the number of soft steel sheets and the initial bending stiffness of hysteresis model in IDARC software and the parameters of bending stiffness after yielding are obtained. Finally, the partition wall with different number of soft steel sheets is arranged in three story 3 span and 6 story 3 span two frame cases to analyze the seismic absorption effect of the partition wall in the frame. By comparing the maximum interstory displacement, the maximum interstory shear force, the natural vibration period, the hinge mode and the damage index of the frame subjected to earthquake, it is found that the partition wall has better damping effect, and the more soft steel sheets are contained in the partition wall, The stronger the earthquake resistance. The seismic absorption effect of each floor partition plan in the frame is better than that only in the bottom layer.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.1

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