土-结爆炸冲击相互作用模爆试验相似设计方法

模爆试验是研究爆炸冲击荷载作用下地基动力性能、土-结爆炸冲击相互作用及埋地防护结构抗爆能力与破坏机理等的重要手段之一。模型相似设计是确保模爆试验能够尽可能真实地反映原型爆炸冲击动力性状的关键之一。以上覆饱和砂土层对浅埋地下圆拱直墙式防护隧道免遭炸弹触地爆炸触发地冲击波破坏的保护效应为研究目的，基于目前广泛应用的Bockinghamπ定理，采用量纲分析方法，并且结合考虑土-结体系非线性爆炸冲击动力响应、土-结接触面爆炸冲击动力响应以及爆炸地冲击波-结构动力相互作用等的相似性，求解土-结爆炸冲击相互作用模爆试验的模型设计相似关系。

A scale modeling method of simulation explosion test of soil-structure impactive interaction due to exploding

A simulation explosion test is an important method to study the dynamic property of foundation, the soil-structure impactive interaction due to exploding, and the anti-explosion ability and destroyable mechanism of underground safeguard engineering structure under impactive load due to exploding. The design of scale model similitude is one of keys to insure that simulation explosion test can really reflect the dynamic characters of prototype under impactive load due to exploding.To aim at the safeguard effect of superstratum of saturated sand to defence tunnel of circular arch and vertical wall which isn’t destroyed by impactive terra wave as a result of the explosion of bomb falling to the ground, this dissertation will base on the theorem of Bockinghamπwidely applied at present, and a method mainly used is the dimensional analysis method, also the comparabilities of the nonlinear dynamic response of soil-structure system to impactive process of exploding, the dynamic response of soil-structure interface to impactive process of exploding, and the dynamic interaction of exploding impactive terra wave and structure are considered , in order to solve the similitude relation of model design of simulation explosion test of soil-structure impactive interaction due to exploding.