Abstract: According to the site characteristic and operation requirement of dry coal shed of Dagang Power Station in Tianjin,several schemes were put forward respectively for the roof bearing structure,lateral load-resisted structure and the bearing column structure. Through comparison of these presented structural schemes,a new-type structure system:hybrid structure of large-span portal frame and cable supported barrel vault was proposed and used in this project. Analysis of the new-type structure was completed under different load case and combination,and the static and dynamic behaviors were acquired. The result shows that this structure has clear constitution and distinct load- transmitting way,whose internal force and deformation meet the requirements of relevant codes,which is suitable for actual conditions of this project.