【摘要】 研究目的:通过现场监测楼房不同层高的振动响应,观测其爆破振动安全效应,分析普通多层建筑对爆破振动产生的高层放大效应现象,并根据居民楼的使用状态提出了符合安全和舒适的振动允许指标,为今后爆破振动安全标准的修改完善提供一定的参考。研究结论:(1)低频爆破振动会导致高层建筑产生顶层振动放大效应,而远大于自振频率的高频振动不易随楼层升高产生振动放大效应;(2)针对多层楼房在不同振源条件下出现振动放大的可能性,提出了距爆源100 m以外的楼房应测试不同层高的爆破振动,而近距离的高频振动可以只监测底层振动;(3)根据楼房结构安全性、普通装修材料的安全性和室内人员舒适性要求,提出了不同建筑物的爆破振动安全控制指标;(4)本研究成果可为铁路石方爆破开挖的安全控制提供借鉴。更多还原

【Abstract】 Research purposes: The vibration amplification( motion at the top was amplified from the bottom motion) of general multistory buildings responding to blasting vibration was analyzed by monitoring structure response of different floors and observing the safety effect of blasting vibration. Additionally,the vibration allowable index for safety and comfort of residential buildings had been put forwardaccording to the usage state.Research conclusions:( 1) When blasting vibration frequency was close to natural frequency of abuilding,the ground blasting vibration would be amplified in the upper portion of this multistory building,while blasting vibration frequency was well above natural frequency of the building,thevibration amplification of multistory building responding to blasting vibration would not easy occur.( 2) According to the possibility of vibration amplification of multistory building responding to different vibration sources,suggestions were put forward that blasting vibration monitoring of different floors should be carried out if the building location was more than 100 m away from explosion source,but only the vibrationof building bottom could be monitored under high frequency blasting vibration if the building was at a short distance of explosion source.( 3) Safety values of controllingblasting vibration of different buildings were proposed according to requirements of building structural safety,decoration materialsafety and indoor comfort.( 4) The research results can provide references for blasting vibration controlling in railway stonework blasting excavation.更多还原