炸药地面爆炸条件下土中浅埋结构上荷载的作用特点

为了研究炸药地面爆炸条件下土中压缩波的波系分布,确定作用在土中结构上的地冲击荷载特点,以典型的土中浅埋结构为例,采用数值模方法,应用LS-DYNA有限元分析软件并结合阿列克辛柯试验现象,对炸药地面爆炸作用下浅地表波场的分布以及作用到土中结构上的荷载进行数值模拟和分析。研究结果表明,典型土中浅埋结构的顶板主要承受空气冲击波引起的间接地冲击荷载的作用,外墙主要承受直接地冲击荷载的作用。

Charac ter istics of loads on sha llow-bur ied structuresunder the ground explosions

In o rde r to m ake ce rta in the distr ibu tion o f the com p ressw av e in the so il and the character ist icso f the g round sho ck loads produced by su rface exp lo sio n them a in desig n loads o f sha llow -bu ried stru ctu re sthe ex am p le o f sha llow -buried st ructu rs under the g round exp lo sions w as presen ted. W ith the num e ricalsim u la tion, FEM so f tw a re LS-DYNA and re la t iv e test data by A lek seew ko, the distr ibu tion o f nearg round w ave f ie ld and the loads on the bu ried structu rew e re stud ied under the g ro und ex plo sions. T he result show s th at the ro o fm ain ly w ithstand the ind irect g round sho ck cau sed by the air sho ck w ave and thesidew a llm ain ly w ithstand the d irect g round sho ck.