Structural Optimization Design Of Underground Concrete Silo Based On Genetic Algorithm

China's population continues to grow,and the demand for food and other materials is increasing.With the improvement of living standards,there are higher requirements for the quality of food in addition to the quantity of food,which further challenges China's food security.Underground granary with its waterproof,fire-proof,poison-proof,explosion-proof performance,and without chemical agents,moth-proof and mildew-proof advantages,can well ensure the quality of grain,and thus achieve safe and healthy storage of grain.On the other hand,underground granary can make full use of shallow ground energy.It has the advantages of saving land,saving energy,good airtight performance,low operating cost,and the operation of grain in and out of storage assisted by mechanized equipment,thus realizing economic grain storage.Based on the national scientific research on food production scientific special(NO.201413007-01),the optimum design of the body structure of the underground concrete silo is carried out by means of theoretical analysis,experimental research and numerical simulation,and its main research work is as follows:(1)Based on the geological and hydrologic conditions of the project,the full scale test of the large underground production warehouse with a capacity of 3500 tons and a diameter of25.6 meters was carried out at different stages from the initial construction to the complete completion.After that,the real-time internal force data of the silo at different construction stages are extracted from the test results,and the test data are analyzed and sorted out to obtain the variation rule of internal force with depth at different construction stages of the underground productive silo.At the same time,the actual value range of silo side pressure is obtained to provide data reference for the verification of subsequent numerical simulation results.(2)The finite element model of underground production test warehouse was established by ABAQUS,a large-scale finite element software,and then the simulation analysis was carried out.Afterwards,the internal force data of the granary body in different construction stages were obtained.Then the finite element model of underground production test warehouse is obtained.The measured data are compared with the finite element model data,and the finite element simulation results are reviewed to verify the correctness of the model.The results of the simulation provide a numerical reference for the internal force data needed in the optimization design of engineering structures.(3)Based on the adaptive genetic algorithm,the numerical analysis software was developed,and then the body structure of the underground production test warehouse was optimized.In addition,the special environment of underground test warehouse is taken into account in the optimization,so a new idea of durability optimization is added.Compared with the original design,the optimized design scheme saves more than 5% of material cost,which achieves the optimization goal both of reliability and economy of the structure.The body structure optimization design of underground granary can make it find the optimal structural design scheme under the premise of ensuring the safety,applicability and durability of the structure,and at the same time determine the reasonable proportion of resources,which can greatly save the engineering cost and avoid the waste of resources.All these are of great significance to the sustainable development of the construction industry and even the construction of a beautiful China.