Performance Research Of Fanshaped Disc-type Energy Dissipator And Application

Assembly building has the advantages of high production efficiency,low labor intensity and environmental protection,which is an important trend in the field of construction in China and even in the world.At the same time,China is one of the countries with high incidence of earthquakes.Because of the serious damage of prefabricated structure in the past,its seismic performance seriously restricts the application of the structure in high intensity areas.To sum up,there is a huge demand for seismic technology of prefabricated building structure in China.Therefore,it is particularly important to research and develop the seismic components and related complete sets of technologies with good performance and strong practicability.Combined with energy dissipation and damping technology,Dr.Guo Yangzhao,Sichuan Academy of Building Sciences,applied damping components to assembly buildings,and proposed a new type of fan-shaped energy dissipator(FDED)with displacement amplification function.Based on the discussion of its design principle and characteristics,this paper studies the feasibility of the principle and mechanism of FDED by using the method of theoretical analysis and numerical simulation,preliminarily understands its mechanical properties and defines the main design parameters and regulations that affect the shock absorption performance of components.The results show that the damping principle of FDED is feasible,and the selection of energy dissipation elements and the design of parameters are the key to affect the damping energy dissipation effect of such components,and also the core of the design.Based on the above theoretical analysis and numerical simulation results,the fan-shaped disc type energy dissipator is designed and manufactured,and its mechanical properties are tested,and the test phenomena,hysteresis curve,skeleton curve and other test results are comprehensively analyzed to clarify its working mechanism and failure mode.The results show that: FDED can achieve the expected working mechanism;the structure of transmission head and connecting parts and linkage measures have an important impact on the energy consumption effect of FDED;through reasonable design,FDED can have a good hysteretic energy consumption effect.Using the structural software ETABS,taking an assembled concrete frame structure as an example,the overall analysis model is established.The response spectrum analysis and time history analysis are used to compare the dynamic response of the two structures under the earthquake action,and the shock absorption effect and the energy consumption contribution of the shock absorption components are analyzed and discussed.The results show that: by comparison with the traditional seismic structure system,the reasonable application The principle of energy dissipation and shock absorption in structural design can better improve the shock absorption performance of the structure and reduce the seismic damage of the structure;FDED shows good hysteretic energy consumption performance under rare earthquake.In order to promote the development of FDED in practical engineering,the problems of installation and construction involved in its application are preliminarily explored;three layout schemes are designed for different wall conditions;according to the current national specifications and technical regulations,the construction process and key technologies of FDED are proposed,and the checking calculation method of relevant parameters is given.