Study Of Safety Criteria For Multi-story Structure By Blasting Vibration Based On Velocity Response Specturm

The safety criteria of blasting vibration for building structure includes peak velocity and main vibration frequency,And the safety criteria for building structure of other countries is also like this.Frequency is a very important factor for safety criteria of blasting vibration for building structure.Vertical earthquake effect is only considered for the earthquake-resistence design in highly seismic region,The capcity of multi-story structure resist vertical earthquake is stronger than that of multi-story structure to resist horizontal earthquake ,Although the nature vibration frequency of multi-story structure is high and approach the frequency of blasting vibration this text only discusses horizontal blasting vibration; Because high-rise building adopts pile foundation and basement the earthquake distater alleviate,The safety criteria for multi-story structure is a major topic in this text. The natuare vibration frequency of brick masonry structure easily approachs the frequency of blasting vibration so the afety criteria for multi-story brick masonry structure is strict. Through the study of the response specturm of blasting vibration conclusions in this text are that the specturm value fall down as the master frquency of the blasting vibration is high and the afety standard for multi-story crack structure is very strict.The effect of blasting vibration on building structure is reguarded as input energy processes, so the quantity of input energy surpass special phase the building structure is safety.In the opinion of energy method the peak velocity is connected with maxium energy of motion,then you can conclude tolerance velocity of every story and can make appropriate safety contral criteria based on velocity response specturm.