CAJ | 학술논문

利用混凝土块的重复倾倒来模拟建（构）筑物爆破拆除的倾倒过程，并采集由此产生的塌落振动信号.在倒塌方向开挖不同长度的减震沟，探索减震沟长度变化对塌落振动信号的衰减影响.对实验所采集的数据信号进行分析，减震沟长度从0.6 m依次增加至1.6 m，峰值振速的降低幅值较大，从1.6 m依次增加到2.4 m峰值振速的降低峰值较小.由此确定在试验条件不变的前提下对塌落振动信号的衰减明显的减震沟长度的最优区间为1.6~2.0 m .另外，通过HHT法得到振动信号的希尔伯特三维能量谱，显示出塌落振动信号携带的能量衰减在0.6 m依次增加至1.6 m的过程明显，从1.6 m增加到2.4 m时衰减作用减缓，进一步验证了在试验条件不变时减震沟长度的最优区间为1.6~2.0 m .
이용혼응토괴적중복경도래모의건（구）축물폭파탁제적경도과정，병채집유차산생적탑락진동신호.재도탑방향개알불동장도적감진구，탐색감진구장도변화대탑락진동신호적쇠감영향.대실험소채집적수거신호진행분석，감진구장도종0.6 m의차증가지1.6 m，봉치진속적강저폭치교대，종1.6 m의차증가도2.4 m봉치진속적강저봉치교소.유차학정재시험조건불변적전제하대탑락진동신호적쇠감명현적감진구장도적최우구간위1.6~2.0 m .령외，통과HHT법득도진동신호적희이백특삼유능량보，현시출탑락진동신호휴대적능량쇠감재0.6 m의차증가지1.6 m적과정명현，종1.6 m증가도2.4 m시쇠감작용감완，진일보험증료재시험조건불변시감진구장도적최우구간위1.6~2.0 m .
The concrete block repeated dumping was used to simulate the dumping process of blasting demolition , and then we collect the resulting morphology vibration signal. Damping ditch excavation of different length in the collapsing direction,we explore the impact of changes in channel length damping of collapse vibration signal attenuation. The experimental analysis results of the data signal acquisition showed that when the length is increased from 0.6 m to 1.6 m,the peak velocity decreased with larger range,while,when increased from 1.6 m to 2.4 m peak velocity decreased with smaller range. Thus it was determined that the optimal interval length of damping ditch obvious attenuation collapse vibration signal of constant in the test conditions was 1.6-2.0 m. In addition,through the HHT method to obtain the 3D power Hilbert spectrum of vibration signals,the vibration signal carrying the collapse energy attenuation in process of 0.6 m increasing to 1.6 m was significant,while the attenuation with the increase from 1.6 m to 2.4 m was slow. It was further validated that the optimal interval length of the damping ditch a constant in the test conditions was 1.6-2.0 m.