Study on the Impact Resistance ofDifferent Kinds of Shed-tunnel Structures
Zhang Qunli1,2,3, Wang Quancai1,2, Wu Qing4, Guo Shaoping1,2,3
1.Key Laboratory of Mountain Surface Process and Hazards, CAS, Chengdu 610049,China; 2.Institute of Mountain Hazards and Environment,CAS,Chengdu600041,China; 3. Graduate Univ. of Chinese Academy of Sciences, Beijing 100049, China; 4.CCCC Civil Engineering Science & Technology Co., Ltd, Xi’an 710075,China
Abstract：In order to explore the rock-fall impact properties of different shed-tunnel structures, five kinds of shed-tunnel structure models were established by finite element method software ANSYS/LS-DYNA. The distribution of force and deformation characteristics was analyzed comparatively. The results showed that the different shed-tunnel structure typespossessed different dynamic response under the same impact load. The comprehensive analysis of effective stress duration curves and roof displacement indicated that the impact resistance of archstyle and semi-arch stylesheds were better than that ofthe gantry ones, and inclined column sheds were better than that of the straight ones. Sections of the maximum equivalent stress showed that dangerous parts of the gantry sheds and semi-arch sheds were at the juncture between the inside of column crown and roof, and that of the arch shed was on thebottom of arch-column, for wheresome reinforcement measures should be adopted in practical projects in order to maintain the safety of shed-tunnel structures.
2015, Vol. 34 
