摘要
基于Airy微小振幅波动理论,利用ABAQUS有限元软件建立海水-围岩土体-隧道结构体系有限元模型,对静、动水压条件下不同埋深海底隧道地震反应特性进行了比较。结果表明：基岩输入南京人工波时,动水压力作用下隧道结构的水平加速度及相对水平位移分别比静水压力作用下相应值大1.16~1.19倍和1.81~2.17倍;随着隧道埋深增加,隧道结构的应力、水平位移逐渐减小,动水压力影响系数KD也呈减小趋势,表明当埋深达到一定数值,静、动水压对隧道结构地震反应的影响将趋于一致;隧道拱肩和拱腰处的应力反应明显大于其他部位,拱肩和拱腰处为隧道结构的最危险部位。
Based on the theory of Airy minute amplitude of vibration,a model of the system among sea hydrodynamic pressure,soil horizon and the tunnel is established on the basis of the software of ABAQUS,the effects of hydrodynamic and hydrostatic pressure on undersea tunnels between different embedded depths are compared. The results show that,when inputting Nanjing artificle wave to bedrock,the horizontal acceleration and relative horizontal displacement is 1. 16 ~ 1. 19 and 1. 8 ~ 2. 3 times respectively under hydrodynamic pressure than hydrostatic pressure; the stress and displacement decrease,as well as the corresponding impact factor of hydrodynamic pressure KD,with the buried depth increasing,which means the effects of hydrodynamic pressure and static pressure on seismic response will tend to be the same when it reaches certain depths; the stress in spandrel and haunch is significantly larger than the others so that be the most dangerous parts of the tunnel.
出处
《工程抗震与加固改造》
北大核心
2015年第1期40-44,共5页
Earthquake Resistant Engineering and Retrofitting
基金
江苏省青年基金项目(BK20130933)
关键词
静水压力
动水压力
埋深变化
海底隧道
地震反应
static pressure
hydrodynamic pressure
range of embedded depth
sea-tunnel
seismic response
