爆炸荷载下盾构管片的动力响应分析  

A simplified calculation method for dynamic response of a shield tunnel segment subjected to explosion loads

作　　者：刘扬[1] 宋春明[1] 卢浩[1] 

机构地区：[1]解放军理工大学国防工程学院,南京210007

出　　处：《振动与冲击》2014年第5期120-124,154,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51008305)

摘　　要：在综合国内外有关隧道抗爆理论和方法的基础上,忽略管片的变形,将管片假设为刚体,提出了一种爆炸荷载作用下管片结构动力分析的简化计算方法,该方法能模拟管片与管片之间、管片与螺栓间以及地基与结构间的相互作用。随后利用该方法对南京地铁进行了抗爆动力响应分析,得到了隧道的位移和速度时程曲线,研究了管片参数变化对结构动力响应的影响。计算结果表明,简化计算方法能准确反映隧道管片结构在爆炸荷载作用下的动力响应,是一个简便实用的计算方法,所得结果可为管片结构抗爆设计提供一定的参考。Based on the theories and methods regarding underground anti-explosion,a simplified calculation method for the dynamic response of a lining segment subjected to blast loading was proposed.The lining was composed of a number of rigid arch segments ignoring deformation of segments.The dynamic interaction among segments,segments and bolts,and the interaction among a tunnel lining segment and soil-structure were properly simulated with the method.As an example,the dynamic response of a shield tunnel segment of Nanjing subway subjected to blast loading was calculated. The time-history curves of displacement and velocity at some key points of the tunnel lining were obtained.Furthermore, the influences of parameters of segments on the dynamic response of the tunnel lining were investigated.The results indicated that the simplified method of blasting response analysis can reflect the dynamic response of a tunnel lining segment subjected to blast loading accurately;this is a simple,convenient and practical calculation method.The results provided a reference for the anti-blast design of a tunnel lining.

关 键 词：爆炸荷载 盾构隧道 抗爆分析 简化计算 

分 类 号：TB41[一般工业技术] TV542[水利工程—水利水电工程]