【摘要】 由于受应力集中及外形发生变化的影响,对于带有竖井的输水隧道,其在地震荷载作用下的应力、变形特性与一般输水隧道存在明显不同。采用基于势的流-固耦合运动方程建立了带有竖井的输水隧道有限元模型,考察其对于地震输入的响应。计算结果表明,由于应力集中,在竖井与隧道接头段,主应力最大;对于隧道段与竖井段,其主应力基本相同,但比不带竖井的隧道主应力要大;地震激励方向的位移最大值发生在隧道段。更多还原

【Abstract】 As influence of stress concentration and shape change,the stress and deformation features of water conveyance tunnel with shaft under seismic load are distinct with the common water conveyance tunnel.The FEM model of water conveyance tunnel with shaft adopting potential-based fluid-solid coupling equation is established,with consideration of the response of seismic input.The results show that due to stress concentration at joint of shaft and tunnel,the largest principal stress appears;the principal stress at tunnel section is approximately equal to that of shaft section,which is higher than the tunnel without shaft;the largest displacement parallel to seismic excitation direction appears at tunnel section.更多还原