地震作用下综合管廊内管道动力响应试验研究

During an earthquake, although internal pipes could be protected by an external utility tunnel, they are often damaged due to an unreasonable design of pipe supports. In the study, aiming at analysing the seismic responses of the internal pipes inside the utility tunnel, the test model of the utility tunnel as well as the internal pipes was designed, the corresponding sensors were installed. The utility tunnel model was placed in a shear box on the shaking table and loaded with the seismic waves. The acceleration responses of the internal pipes were investigated, and the attenuation of peak acceleration responses and the energy transmitted to pipes were expounded. The effects of longitudinal and transverse slippages of the pipes and the tunnel, the form of pipe supports and the material of the pipes on the deformation of the pipes were then investigated. It is found that the degree of energy attenuation transmitted to the pipes inside the utility tunnel is basically above 80% . If the input seismic with large acceleration lasts longer, the longitudinal relative slippage of the pipe is generally larger. The vibration isolation effect of the angle steel support on the tunnel side wall is stronger than that of the concrete pier support, and the anti-seismic effect of placing the pipe directly in the pipe groove is worst. The conclusions not only provide a basis for the seismic design of internal pipes inside the utility tunnel, but also can be used to quickly judge the damage of internal pipes after an earthquake, which is beneficial to the development of post-earthquake rescue.