Author(s): Ming Li; Ningbo Li; Xuepeng Zhang; Xingda Wang; Yujing Jiang

Linked Author(s):

Keywords: Hydraulic tunnel; Seismic performance; Laminated shear energy dissipation control; Aseismic performance

Abstract: The construction of a considerable number of hydraulic tunnels in areas of high intensity inevitably requires significant demands on the seismic performance of the hydraulic tunnels. A novel laminated shear energy dissipation (LSED) structure is proposed for the longitudinal aseismic design in this paper. The LSED structure is composed of a thin steel plate and rubber layer bonded alternately aiming at improving the longitudinal seismic performance of the tunnel by changing the connection mode between the linings. The laboratory compression-shear test on the LSED structure is carried out. Results show a better deformation capacity in the horizontal direction because of the small horizontal stiffness of the rubber layer in the structure, and a larger vertical bearing capacity in the vertical direction because of the rigidity of the thin steel plate. A three-dimensional refined numerical model of LSED structure-tunnel lining-surrounding ground is established using the finite element software ABAQUS. The seismic response analysis is carried out by using the dynamic time history method. The research results showed that the installation of the LSED structure could effectively reduce the seismic response of the lining with a seismic mitigation rate of more than 45%.

DOI: https://doi.org/10.64697/978-90-835589-7-4_41WC-P1562-cd

Year: 2025