Civil Air Defense Engineering Wall Structure Analysis And Design Optimization

At the time of the war,the air defense basement can protect people's lives and property,to minimize the loss.With the rapid development of China's social economy and the continuous construction of urban construction,for the construction of underground space also put forward higher requirements.On the whole,China's civil air defense project construction is not perfect,still continue to explore practice.The basement wall structure is the main force in the basement of the air defense,in the main body and the mouth has an important role,it can be said that the use of civil air defense basement and the use of the function will be the basement wall structure design quality.In the past,we designed the anti-wall structure,usually the spatial structure is simplified into a planar structure,and then take the map,analysis of internal forces,select and check the cross-section,the advantage of this design method is to ensure that the safety of air defense basement,But did not consider the cost of construction.In order to achieve the perfect unity of economic and safety of civil air defense basement construction,this paper adopts finite element method to analyze the force principle of air defense basement wall structure,so as to optimize the design of air defense basement wall structure.This paper summarizes the related aspects of the structure,characteristics and design principles of the civil air defense basement,and analyzes the method of optimizing the design of the anti-basement wall structure.In this paper,we analyze how to select the load value and combination of the structure of the basement wall of the air defense,and explore the limit of the bearing capacity of the wall structure.In this paper,we analyze the load value of the wall structure of the air defense basement,The bearing capacity and the crack of the air defense exterior wall are analyzed,and the bearing capacity limit of the air wall and the door frame wall is analyzed and analyzed.Finally,the construction of the wall structure of the air defense basement To draw and explain accordingly.On the basis of the design results,using midas FEA,a large-scale civil engineering finite element analysis software,the load of the war is divided into 10 loading steps,and the wall of the mouth is subjected to wartime steel stress and structural deformation.Structure of the force mechanism of the intuitive discussion.After analyzing the results,it is shown that the existing design method is conservative,not only the rebar does not yield but also has at least 20% of the stress elastic space,which causes unnecessary waste,and puts forward the factors that need to be considered between the components.To promote the overall thinking and finite element method,which can be more intuitive to determine the stress concentration position,to avoid the local damage caused by the overall instability.The research results of this paper have some theoretical and guiding significance for the optimization of oral design of civil air defense project.