Research On Design Methods Of Energy Dissipation And Shock Absorption For Existing Buildings

In the 21 st century,human beings have repeatedly faced the social challenges of reconstruction and reconstruction after severe earthquake damage,and the city's seismic toughness has been widely valued.The China Earthquake Administration has made "Resilient Urban-Rural" one of the four key projects in the seismic science innovation project plan.Beijing's latest master plan proposes “strengthening the capacity of urban disaster prevention and mitigation and improving the resilience of cities”.The Shanghai City Master Plan(2017-2035)proposes to "Protrude the bottom line constraints and the low-carbon toughness path." But the establishment and development of every city is really a long process.There are not only new buildings but also a lot of old buildings in the city building complex.Newly constructed buildings generally respond to the latest developments in the field of seismic engineering,comply with current seismic design specifications,and have better seismic performance.And a large number of old buildings often have huge earthquake hazards,which is also a huge challenge to achieve a resilient city.The anti-seismic design of traditional structures basically aims at achieving three levels.This design logic,based on the concept that life is priceless,is the basic guideline for the seismic design of most structures.However,after the earthquake,although the building did not suffer serious damage due to the collapse of the structure,the actual situation of the damage caused the interruption and loss of the original function of the building,and even caused the destruction of non-structural components,hardware equipment and property of the building,which result in greater damage to property or function than the destruction of the building structure itself.With the emphasis on high-efficiency industrial needs and a high standard of living environment,the seismic performance of the structure and the functional recovery after the earthquake have been deeply valued by the people.In addition to several major earthquake disasters in the world in recent years,the structure dissipates energy.The research of shock absorption technology is an important issue in various countries.Based on the existing buildings,this paper studies the four aspects of analysis methods,design methods,analysis and design and methods based on time domain analysis of energy dissipation and shock absorption design of existing buildings: The classification and mechanical models of several dampers are summarized,and the single-degree-of-freedom systemis taken as an example to explain the reasons for the energy dissipation and shock absorption structure to control the seismic response from the perspective of response spectrum and energy.Summarize the design methods of existing building energy dissipation and shock absorption structures,including mode decomposition method,Static pushover analysis method,time history analysis method and energy analysis method;A design theory is proposed for energy dissipation and vibration reduction of existing buildings based on time domain analysis.The feasibility of the existing building energy dissipation and vibration reduction design method proposed in this paper is verified through the simulation analysis of engineering examples.