| Steel silo, with its light weight, short construction period, low cost, little pollution, etc. is widely applied in modern industry and agriculture. But now, due to inadequate research of thermal effects generated by the temperature load on the steel, it would cause a risk to steel silos constructing in an environment with tough conditions or large temperature changes.By studying the construction of a large-diameter ground-supported flat-bottomed cylindrical steel silo, with the use of finite element analysis software ANSYS, in accordance with the producing of finite element model as well as the requirements of Chinese code for design of grain steel silos (GB50322-2001) and by selecting calculation parameters, the temperature load imposed on the silo model in different situations is analyzed and studied in this thesis, with major work as follows:By stressing winter and summer temperature loads on steel silos according to the local climate of the project, and through analysis, conclude the temperature load's impact on wall stress of the Steel Silo; through buckling analysis, conclude temperature load's impact on buckling load of the silo wall; make appropriate changes to the wall thickness and diameter of the steel silo according to practical project., and through analysis, conclude both impacts on the wall temperature stress under the temperature loads.The research results indicate:temperature changes of steel silo have distinct impact on the wall stress, when the wall temperature is at-40℃, the hoop stress of the wall is 11 times of that caused by storage material loads; in GMNA and GMNIA buckling analysis, temperature load has great impact on buckling load, when the wall temperature is at 80℃, the buckling load of the silo reduces by nearly 10%; when the wall thickness changes, for a 50℃load and 28mm silo bottom impacted, the hoop stress of the wall is five times of that caused by storage material loads, for a 38mm silo bottom and 50℃load, it is thirteen times as well; and when the diameter of the silo is 38m, the axial compressive stress of the silo bottom increases by 8.14% and Mises equivalent stress by 8.67%, compared with a 28m silo diameter.
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