| When the surface temperature or internal structure change, can make this part of theexpansion or contraction, due to external constraints and structure of the constraints between theparts of each other, and then produced stress, namely the temperature stress.Temperature effectexists in the structure. In order to satisfy the nowadays light steel frame of requests, the spanstructure is more and more big, the structure form more and more complex, temperature effectbecome design and construction of the factors should not be ignored.In this paper, according to door frame of light building structure the requirements oftechnical specification, simulation of the practical project of the operating mode, design asingle light steel plant. According to the already set load, the calculation of the door frame ofbeam and column, the transverse dimensions. By the analysis of the heat in understanding thebasic theory and temperature effect, discuss the generation of temperature stress condition andthe stress formula, and finite element method.Understanding the influence of temperature on the steel characteristics: high temperature ofthe thermal characteristics of steel and the mechanical properties. In this paper, according to thetemperature to choose steel products in hot on physics and mechanics coefficient. Such asthermal expansion coefficient, specific heat let, coefficient of thermal conductivity, density,strength, the elastic modulus and poisson’s ratio, the creep and relaxation, stress and strainrelationship model.In this paper, the temperature change on duplicate payments cross section temperature fieldof the finite element analysis. Set the temperature change radiation effects by day, set the finiteelement calculation model, sure space node temperature and thermal analysis. According todifferent duplicate payments the transverse dimensions, in different temperature cross section ofthe temperature field distribution, and concludes that the radiation effect of temperature, thetemperature field distribution, according to each node of the temperature, temperature changesmade graph. Analysis on the same day the radiation temperature, cross section webs height onthe steel flange duplicate under temperature and the influence of the temperature difference andflange. Analysis on different days radiation temperature, webs height on the steel flangeduplicate under temperature and the influence of the temperature difference and flange.The influence of temperature field of structure factors, the temperature differential intodifferent categories. In this paper, need to think about is the temperature, temperature and thetemperature difference between internal and external in structure.Based on the design of the light steel frame, analysis of the effect the temperature change.First steel portal frame design in finite element, and then a different temperature difference underthe action of the door frame for analysis, that door type on the shelf just different temperature field distribution and temperature stress distribution, each type of temperature on just the biggeststress value are calculated, the design of the percentage of the value of steel. Use hot-structurecoupling unit, have to go out of the frame of the deformation of the maximum, judge the doorframe of stability. |
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