Research On Damping Of High-rise Industrial Building In High Intensity Area

In recent years,earthquakes have occurred frequently in Yunnan Province.In order to cope with the severe situation of shock resistance and disaster reduction,Technical Guidelines for the Design and Review of the Energy Dissipation and Shock Absorption of Buildings in Yunnan Province(Trial)was issued in 2017,which greatly promoted the application of seismic reduction and isolation technology in the construction of such projects as public buildings,schools and hospitals in Yunnan.Through substantial engineering practice,the application of seismic reduction and isolation technology is becoming more and more mature.Meanwhile,seen from the influences brought by earthquakes,it is shown that seismic reduction and isolation technology can improve the safety of buildings.The phosphorus-making factory buildings of a chemical plant in Yunnan Province where high-risk chemical products are produced tower 34.5m and therefore are high-rise buildings.Moreover,where these buildings are located is also categorized into a high-intensity earthquake area for its basic fortification intensity,8 degrees(0.20g).In order to improve the seismic safety of the high-rise factory buildings,energy-consumption buckling-restrained brace and friction damper are selected in consideration of the fact that they can improve the stiffness of the structure and dissipate energy under rare earthquake.Besides,MIDAS/Gen is also adopted to establish the analysis model to respectively analyze the seismic response of two different damping schemes.Through research and comparative analysis,the shock-absorption design scheme of high-rise factory buildings is finally fixed.The main research work is as follows:1.Reviewing the status quo of the theoretical researches on buckling-restrained braces and friction dampers.2.Summarizing the inspection and test requirements of buckling-restrained braces and friction dampers.3.Summing up the primary design process of the damping reinforced concrete frame structure in combination with the characteristics of the buckling-restrained braces and friction dampers.Taking a chemical plant’s phosphorus-making factory buildings as an example,the writer selects buckling-restrained braces and the friction dampers as shock absorbers,adopts the massive finite-element software of MIDAS/Gen to establish the analysis model of reinforced concrete frame with additional energy-dissipating buckling-restrained braces and the analysis model of reinforced concrete frame with friction dampers respectively,then obtains the dynamic response of the structure through elastic time history analysis under both frequent earthquakes and rare earthquakes,and eventually settles the shock absorption plan for the high-rise factory buildings of the chemical plant through comparative analysis and determines the mechanical parameters of corresponding products,which provides a theoretical basis for the smooth implementation of the project and the production of shock absorption product.4.Summarizing what has been researched in this paper,coming up with suggestions on the research direction of the future.