多维爆破震动速度荷载作用下结构动态响应

he amplitude, frequency and duration of blasting vibration are the important parameters causing structure blasting vibration response and breaking. Safety Regulations of Blasting regulates that the criterion of structure blasting vibration are the peak vibration speed of particles and the main vibration frequency, but it doesn’t point out that the speed is total speed of three directions or one direction speed, which makes troubles to apply blasting vibration criterion. In the paper, the structure dynamic responses under different blasting vibration frequency-speed loads are discussed by the finite-element time-history analysis, and pointed out that the frame structure response to higher frequency blasting vertical vibration loads is greater, which means it will get broken much easier. So the maximal vibration speed amplitude can be the blasting vibration safety standard. While under the lower frequency blasting vibration loads, structures’ broken made by the level blasting load is primary. So the level maximal load should be the blasting vibration safety standard. It means structures’ aseismatic safety standard should be the vertical speed amplitude when under high frequency loads or the level speed amplitude when under low frequency loads.