爆炸荷载下隧道口动力离心模型试验研究  

Centrifugal modeling of blast-induced response of tunnel

作　　者：张应刚[1,2] 马立秋 张嘎[1,2] 张建民[1,2] 

机构地区：[1]清华大学岩土工程研究所,北京100084 [2]水沙科学与水利水电工程国家重点实验室,北京100084 [3]中国核电工程有限公司总图地质所,北京100830

出　　处：《世界地震工程》2010年第S1期212-215,共4页World Earthquake Engineering

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。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.

关 键 词：隧道 爆炸离心模型试验 塑性区 动力响应 

分 类 号：U458.2[建筑科学—桥梁与隧道工程]