CHEN YEQING, GONG GUPEI, XIE DONGSHENG, Beijing Canbao Architecture Design & Research Institute, Beijing 100036, China, 
e-mail: сsrme@163.com

Dynamic interaction mechanism between rocks and underground arches

A procedure is presented to analyze underground protective structures subject to conventional weapons effects. A radiation damping term is added to a simple mass-resistance system to consider structure-soil interaction effects. To reflect the influence of the radius to the dynamic interaction, traditional Constantino model will be applied. Based on the virtual work method, the displacement and the reflective coefficient of the arch were deduced. Combined with the distribution of the free-field of the explosion on the surface of the arch, dynamic loading of the arch can be calculated. The predicted result is also checked by numerical simulations. SUBJECT: Analysis techniques and design methods.

Key words: dynamics, tunneling.