【摘要】 在传统有限单元法中引入了粘弹性边界,建立了隧道动力时程分析模型。通过与离心振动台模型试验进行对比,验证了本方法的合理性。然后,建立了隧道结构的三维有限元动力分析模型,研究了在地震荷载作用下,复线隧道和既有隧道之间的动力相互作用,重点分析了施工加固措施、净化设备的安装、隧道管片变形缝等因素对于复线隧道抗震性能的影响,结果表明:隧道间的相互作用随间距的增大而降低,施工加固措施明显降低了结构的动力响应,净化设备对隧道结构地震响应无明显影响。更多还原

【Abstract】 This paper set up a finite element model for tunnel structures by introducing visco-elastic boundary.Through comparing the obtained result with that of centrifuge shaking table model test,the rationality of this method was verified.Moreover,a three-dimensional finite element dynamic tunnel structure model was used to study dynamic interaction of double line tunnel and existing tunnel under seismic load.More attention was paid to the influence of construction reinforcement measures,the installation of purification equipment and deformation joint of tunnel segments on seismic performance of a double-track tunnel.It can be concluded that the interaction between tunnels decreases with the increase of space;construction reinforcement measures evidently reduce the dynamic response of tunnel structure;purification equipment has no clear impact on earthquake response of tunnel structure.更多还原