论文部分内容阅读
为了研究盾构隧道管片接头在内爆炸作用下的动力反应特点,基于显式动力分析软件LS-DYNA程序,以典型地铁区间盾构隧道为例,建立了考虑管片-管片、管片-螺栓及管片与周围土体界面接触效应的三维计算模型,研究了盾构隧道在内爆炸冲击荷载作用下的破坏机理,揭示了管片和连接螺栓的破坏特征。计算结果表明,提高连接螺栓强度和延性可改善盾构隧道的抗爆特性。
In order to study the dynamic response characteristics of shield tunnel segment joints under explosion, based on the explicit dynamic analysis software LS-DYNA program, taking a typical subway section shield tunnel as an example, - The three-dimensional calculation model of the contact effect between the bolts and the surrounding soil and the contact between the soil and the surrounding soil, the failure mechanism of the shield tunnel under the explosive impact load is studied, and the failure characteristics of the pipe and the connecting bolt are revealed. The calculation results show that improving the strength and ductility of the connecting bolts can improve the antiknock characteristics of the shield tunnel.