| Spatial structure of the underground structure is a comprehensive engineering and underground engineering problem, not only with the simplified model, but also related to the role with the soil, but also involves economic issues. This thesis is the design of a large underground air raid shelters in Guangdong analysis of space, often used for the design of the force model of plane problems, the use of SAP2000 finite element software engineering spatial analysis, through the establishment of spatial three-dimensional calculation model calculation, the results with the plane stress model are the results of comparative studies, to draw general conclusions, and also studied under different conditions in space variation model of the internal force and air defense projects of similar design of Te Daxing provide some reference and help.The paper includes the following elements:First of all, analysis of underground civil air defense engineering method of introduction of the system;Secondly, established by SAP2000 finite element analysis model plane and space force model, by analyzing the results of two studies, to identify spatial analysis for plane stress analysis model and the model differences, and pointed out their advantages shortcomings, the design for future reference.Finally, force model due to space can be very good on board, columns when the line of analog, they are able to consider many factors, but the actual structure of these soil effects on many aspects, so the main consideration in the engineering practice which often touch the various factors to study the structural changes of the internal force, to draw general conclusions.Thesis summarizes the different methods of internal force of simplified rules and conditions under the influence of variation of internal force, both for improving the economic and social benefits of some help and significance. |
