关键词: 棚洞结构, 衬砌, 荷载结构法, 安全性分析, 有限元, ANSYS

Abstract: The plane analysis is mainly used in previous finite element analysis of shed-tunnel’s structure. Although the plane analysis is simple，they cannot analyze the safety of lining structure at cross-section of span. The load structure method is applied to calculate the internal force of each element in 3-D shed-tunnel lining structure，furthermore，the safety calculations is also carried out according to its lining structure reinforcement. The numerical simulation shows that the maximum axial force of shed-tunnel lining appears in the sidewall of the foundation along the mountain; the maximum positive moment appears in the central region of curved wall and that most positive moment appears in the central region of the left board. The lining structure safety coefficients of mid-span section are slightly higher than those of the support saddle section， and the safety coefficients of whole lining structure satisfy the requirements of“Road and Tunnel Design Specification”( JTG D 70—2004).

Key words: shed-tunnel structure, lining, load structure method, safety analysis, FEM, ANSYS