Study On Structure Mechanics Analysis Of High-rise Isolated Buildings In Moderate Earthquake Intensity And High Wind Pressure Area

Isolated buildings are to be isolated effectively from earthquake-induced motions.In fact,the principle of shock absorption of high-rise isolated buildings are not clear and high-rise isolated structure also are poor of overturning stability,So seismic isolation systems have not been adopted in high-rise buildings widely.There are a contradiction between in shock absorption and wind resistance of high-rise isolated buildings.It is a worthy issue of studying the balance of damping effect and wind control in high-rise isolated buildings,especially in the medium-intensity and high-pressure area.In this paper,the design of the isolation layer of the high-rise isolated buildings are introduced in detail.The feasibility of the isolation layer design is verified by the time history analysis method with inputting the three-dimensional seismic wave.From the perspective of modal analysis and response spectrum analysis,the principle of shock absorption of high-rise isolated buildings are studied.The shock-absorbing effect of the high-rise isolated buildings in the event of the fortification intensity of 7 degrees(0.15g)earthquake occurred more frequently and in the event of the fortification intensity of 7 degrees(0.15g)rare earthquake are studied,and compares the two.Using the harmonic superposition method,using MATLAB programming,numerical simulation of the high-rise buildings on the floor of the wind and wind direction to 0.1s time,save 6000 steps,up to 600s wind load data.The wind load is applied to each node of the structural model,and the deformation of the isolation layer,the damage of the isolation bearing and the overturning stability of the whole structure of the high-rise building in the event of a 50-year earthquake were examined.In the event of a 10-year,50-year wind load,the wind-induced response of the structure,as well as the comfort of the high-rise building is studied.It is found that the high-rise isolated buildings has the best first vibration-damping effect,and suppresses the seismic response of the high-order modes involved in the structure.This is the reason why high-rise isolated buildings has excellent damping performance.The seismic performance of the high-rise building after isolation is excellent,and the deformation of the isolation layer is large.In the event of strong winds,the deformation of the isolation layer is within the effective deformation range,the isolation bearing is not damaged,the overall stability of the structure is good.In the event of a 10-year wind loads,the comfort of the high-rise isolated buildings can meet the requirements.Across-wind loads are more sensitive than along-wind loads,and across-wind structural response increases even more as the wind pressure increases.