摘要
以港珠澳大桥沉管隧道为工程研究背景,考虑管节接头GINA止水带的橡胶材料特性、场地的初始地应力平衡以及上覆动水压力作用等,分析了水平及竖向地震作用下沉管隧道三维动力反应。结果表明:动水压力对隧道结构的竖向及水平方向的动力响应均有一定影响,尤其是对隧道结构的竖向反应影响较水平方向更加明显,最大可达70%;隧道接头GINA止水带竖向剪切变形较水平纵向的拉伸变形及水平横向剪切变形明显偏大,尤其两侧止水带竖向剪切变形较大;混凝土隧道管节上顶板及边墙较管节底部更易受到明显的拉应力。
In the immersed tunnel engineering project ofHong Kong-Zhuhai-Macao, the rubber material properties of GINA water-stop, initial stress equilibrium and hydrodynamic pressure have been considered. Three-dimensional seismic dynamic response have been analyzed under horizontal and vertical vibration. The results show that the hydrodynamic pressure force has dynamic influence to the tunnel structure in both vertical and horizontal directions. Especially the influence on vertical is up to 70%, and the vertical shear deformation is significantly larger than the longitudinal tensile deformation and horizontal transverse shear deformation, especially on both sides of G1NA water-stop. The tensile stress on the side wall of the concrete tunnel tube is much more greater than the bottom.
出处
《震灾防御技术》
CSCD
北大核心
2016年第1期44-54,共11页
Technology for Earthquake Disaster Prevention
基金
国家重点基础研究发展计划973计划项目(2011CB013600)
国家创新研究群体项目(51421005)
