地下管线在地表爆炸荷载下的位移响应与参数分析  

Parametric Study and Displacement Response of Steel Pipeline Subjected to Surface Explosion

作　　者：王亚光[1] 廖晨聪[1] 张琪[1] WANG Yaguang;LIAO Chencong;ZHANG Qi(Department of Civil Engineering/State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学土木工程系海洋工程国家重点实验室

出　　处：《上海交通大学学报》2020年第2期193-199,共7页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金重点基金(41330633);国家自然科学基金面上基金(51678360);重大科研仪器研制项目(41727802)

摘　　要：通过将u-p模型嵌入有限元程序建立了地面爆炸荷载下钢顶管的动态响应模型,研究了饱和土中钢顶管在地面爆炸荷载作用下的动力响应问题.以钢顶管的位移响应为主要评价指标,研究了炸药量、起爆位置、钢顶管埋置深度以及顶管半径等参数对于钢顶管位移响应的影响.研究结果表明顶管竖向位移随炸药量增大,顶管半径的增大会降低顶管在爆炸荷载下的承载能力,适当提高埋深可以显著增强顶管在地面爆炸荷载作用下的抗爆能力.此外,随着偏移距离的增大,顶管竖向位移逐渐降低,最终在爆炸荷载作用下微量上浮,顶管的水平位移也随偏移距离先增大后减小.A coupled numerical model is es tablished by adopting the up model.The dynamic response of pi pe jacking in saturated soil under surface e xplosion is investigated in detail.A comprehensive parametric study is carried out to study effect of explosive charge,explosion offset,embedment depth and radius of the pipe jacking.The results show that the vertical displacement of pipe jacking increases with explosive charge.The stability capacity of the pipe jacking under surface explosion decreases as the pipe radius increases.Increasing the buried depth of pipe jac king can significantly enhance the antir-explosion ability of pi pe jacking under surface explosion.In additioin,the vertical displacment of the pipe jacking decreases as the off-set distance increases.The pipe jacking rises slightly under surface explosion eventually.And the horizontal displacement increases firstly and then decreases as off-set dis tance increases.

关 键 词：顶管 地表爆炸 饱和土 位移响应 

分 类 号：TU470[建筑科学—结构工程]