TY - JOUR ID - 1517 TI - A numerical analysis of effect of segmental lining joints on tunnel support internal forces under seismic loading JO - Journal of Mining and Environment JA - JME LA - en SN - 2251-8592 AU - Kheyrandish, I. AU - Ahmadi, M. AU - Jahankhah, H. AD - Mining Engineering Department, Tarbiat Modares University, Tehran, Iran AD - Geotechnical Eng. Research Center, International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran Y1 - 2019 PY - 2019 VL - 10 IS - 4 SP - 979 EP - 999 KW - Finite Element Method KW - Segmental lining joint KW - Interface friction KW - Tunnel support systems KW - Seismic design DO - 10.22044/jme.2019.8508.1730 N2 - During an earthquake, the better performance of segmental tunnel lining, compared to the continuous in-cast concrete lining, is generally related to the joints between segments. In order to better understand the influence of the segment joints, their effect on the internal forces induced in tunnel lining simultaneously with the effects of the other influential parameters should be considered. In this work, the segmental joints were simulated by the representative stiffnesses and effects of these characteristics in relation to the other parameters such as the soil-liner interface behavior, number of segments in each ring and thickness of segments on the internal forces induced in structure were investigated. For this purpose, 2D numerical analyses were performed and the results obtained were discussed. Results showed that under the seismic condition, the components that had the most significant role on the internal axial forces induced in the segmental lining were rotational stiffness and axial stiffness of joints. Also the bending moments were more affected by the rotational stiffness. Generally, the radial joint stiffness had a less effect on the induced internal forces. With increase in the number of segments and their thickness, the effect of joint stiffness on the internal forces increases and the design of joints should be given more attention; however, the effects of joint stiffness and frictional behavior at the soil-liner interface on the maximum induced forces are almost independent from each other. Also in a specified joint behavior, by variation in each one of the other parameters including the soil-liner interface condition, number of segments and their thickness, the absolute magnitude of the maximum induced internal forces sometimes change significantly. UR - https://jme.shahroodut.ac.ir/article_1517.html L1 - https://jme.shahroodut.ac.ir/article_1517_700dc5d6973540dff318519c0434b017.pdf ER -