【摘要】 利用改进的φ2.5mm×5m的模拟爆炸装置进行了一系列爆炸波与结构相互作用的实验,得出了爆炸波作用下结构上的表面压力、动量、应变的实测波形。实验结果表明,由于结构刚度较小,在相同爆心距离条件下结构的荷载与自由场的压力值相差不大;荷载在顶板的分布较为均匀,结构在爆炸载荷作用下发生整体变形,可以用中心荷载代替整体荷载;结构对爆炸波的反射,无论是弹性波还是冲击波,反射规律基本一致。随着饱和度的增大,结构上的反射系数和爆炸冲击波波速也随之增大。更多还原

【Abstract】 Using φ2.5 mm×5 m pothole,the experimental study of the interaction between blast wave and structure in highly saturated soils is accomplished systematically.According to recorded waveforms of stress,strain and momentum,the experimental results are interpreted.The experimental results indicate that blast loads on structure are not much more than value of pressure in free field;loads on roof of structure are more uniform than expected value;the overall deformation of structure is generated under blast loads,central loads are used to take place the entire loads;whether or not there is the shock wave,the law of reflection is the same;blast wave velocity and the reflection coefficient of structure increase with saturation degree.更多还原