【摘要】 城市生命线工程如地铁隧道已经成为恐怖袭击的目标,抗爆防爆问题成为热点研究问题之一。文中采用清华大学50g-t土工离心机进行了爆炸离心模型试验,研究了隧道口区域在爆炸荷载作用下土体-结构物系统的动力响应规律。通过测量和分析土体位移得到了弹坑塑性区的界限,分析结构的应变响应,得出塑性区与结构的相对位置是影响结构响应的主要因素之一。更多还原

【Abstract】 City lifeline project such as subway is likely to be the target of the attacks.Therefore,the anti-explosion and explosion protection of the tunnels is becoming a hot spot of research.Relying on Tsinghua University 50g-t geotechnical centrifuge,this paper has conducted a succession of explosion geotechnical centrifuge tests to explore the dynamic response law of soil-structure system.The extension of the plastic region surrounding the crater is ascertained through the measurement and analysis of the soil displacement.After strain-time analysis of the structure,we conclude that the relative position between plastic region and structure is one of the key factors which determine the structure’s dynamic response.更多还原