爆炸荷载作用下软土隧道动力响应数值模拟  

Numerical Model for Dynamic Response of Tunnel in Clay Under Explosive Loading

作　　者：刘干斌[1] 郑荣跃[1] 周晔[1] 

机构地区：[1]宁波大学建筑工程与环境学院,浙江宁波315211

出　　处：《宁波大学学报（理工版）》2009年第2期263-267,共5页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：国家自然科学基金(50679074);浙江省自然科学基金(Y107637)

摘　　要：以拟建宁波轨道交通建设工程盾构隧道为背景,在设定爆炸当量的基础上,通过数值模拟获得爆炸应力波在软土中的传播规律、隧道周围不同点压力、隧道衬砌结构速度和加速度时程曲线.进而通过分析得到爆炸时盾构隧道衬砌结构底板、顶板和左右侧帮各部位的位移、加速度和最大主应力分布状况,结构各部位所受爆炸冲击波荷载的特点及受载薄弱部位,可为隧道结构设计提供参考.Based on the speculated explosion equivalence designated for the shield tunnel in Ningbo urban rail transit project, the transmission of explosive stress wave, the pressure in different point around the tunnel, and the history curve of tunnel lining velocity and acceleration are obtained using the method of numerical modeling. Furthermore, displacement, acceleration and the greatest stress on bottom, top and lateral in the shield tunnel are calculated for the exploding impacts with different explosive loadings. The most vulnerable sections in tunnel are also analyzed in this paper.

关 键 词：爆炸荷载 软土 隧道 数值模拟 

分 类 号：TU471.2[建筑科学—结构工程]