Analysis On The Vibration Of Adjacent Buildings In Blasting Demolition

In order to study the influence of blast vibration on nearby buildings,base on the monitored data from the demolition blasting of the Technology Building in Wuhai City,the paper conducted simulation study by analyzing the damage of nearby buildings with with or without damping protective measures.First,by monitoring the data of seismic wave,calculating third order spline function of tested signals and differential operation to get the vibration acceleration signal and analyze the acceleration signal features.Through high rise frame structure of ten floor height of practical engineering,using LS-DYNA to construct structural model,simulation analyze the changing rules of stress and nodes of building elements in different effects of seismic wave.By analyzing the stress of buildings,the paper can see that the stress of buildings declines in the effect of damping ditch,which is because under the influence of damping ditch,the stress became smaller and irregular.Starting from the relative displacement angle of nodes,the collapsing of whole structure building of nodes is in the direction of Z and Y,the relative displacement of nodes is much smaller in the effect of damping ditch,and in the direction of X,the change of relative displacement of nodes is much smaller.The damping ditch has an obvious damping effect on the stress of building elements,and relative displacement in Y direction,but does not has an obvious damping effect on other aspects.By studying the stress of the building elements and relative displacement of nodes,the paper provides important reference for buildings on the assessment of dither effect in the effect of blast loading.