基于负刚度碟簧装置的竖向隔震支座力学性能研究  

Mechanical Behaviors of Vertical Isolation Bearings Incorporating Disc Spring Negative Stiffness Devices

作　　者：庄鹏 张鸿昌[1] ZHUANG Peng;ZHANG Hongchang(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Multi-Functional Shaking Tables Laboratory,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京建筑大学大型多功能振动台实验室,北京100044 [3]北京建筑大学工程结构与新材料北京高等学校工程研究中心,北京100044

出　　处：《水利与建筑工程学报》2024年第4期140-146,共7页Journal of Water Resources and Architectural Engineering

基　　金：北京建筑大学大型多功能振动台阵实验室开放研究专项基金(2022MFSTL12);北京市自然科学基金资助项目(8182016)。

摘　　要：在竖向隔震中,为同时满足高静态刚度和低动态刚度的需求,提出一种基于预压碟簧的负刚度装置(disc spring negative stiffness device,DSNSD),利用其与已有的预压弹簧装置(prepressed spring device,PSD)集成为拥有高静低动刚度的竖向隔震支座(PSD-DSNSD隔震支座)。首先对DSNSD的构造与工作原理进行详述,建立相应的力学模型,再通过Python进行数值模拟,考察上述碟簧装置的力学性能,最后利用Abaqus建立PSD-DSNSD竖向隔震支座的有限元模型进行模拟。结果表明:加入DSNSD后竖向隔震支座的隔震刚度显著降低,验证了将DSNSD用于竖向隔震增效的可行性。说明DSNSD在启动后可提供负刚度,从而有效减小整体装置的竖向刚度。Three-dimensional(3D)isolation is one of the current research hotspots for the control of strong seismic be-havior of structures.However,the contradiction between high static stiffness for load carrying and low dynamic stiffness for vertical isolation is a long-term unsolved issue in the development of 3D seismic isolation.Accordingly,a disc spring negative stiffness device(DSNSD)is proposed,which is combined with the previously developed prepressed spring device(PSD)to form a vertical isolation bearing with high-static-low-dynamic stiffness.The configuration and working principle of the DSNSD are described in detail,and the corresponding mechanical model is established.Py-thon-based numerical simulations are conducted to investigate the mechanical properties of the DSNSD.A PSD-DSNSD vertical isolation bearing is modeled using ABAQUS to validate the feasibility of using DSNSD to improve vertical isola-tion effects.The results show that the DSNSD provide the anticipated negative stiffness in vertical isolation after activa-tion,which is used to effectively reduce the vertical stiffness of the entire isolation device.

关 键 词：竖向隔震 碟簧负刚度装置 预压弹簧装置 力学性能 数值模拟 

分 类 号：TU352.1[建筑科学—结构工程]