Analysis on temperature action of large-scale embedded parts under solar radiation
In the process of construction,the deformation of steel structure caused by temperature variation is more common,especially large steel structure.Therefore,taking the embedded parts of large steel structure as the research object,considering the temperature difference between the heat transfer surface of the light side and the backlight side of the embedded parts unit,the calculation method of surface temperature of the embedded parts under the action of solar radiation was established.Combined with the measured data of the surface temperature of the embedded parts,the temperature field distribution and deformation law of the embedded parts were analyzed by MIDAS Gen software.It is found that the temperature field of the embedded part units has a strong non-uniformity under the sunny weather,and the temperature of the measuring point on the light side is 5～10℃higher than that on the backlight side.In the case of cloudy weather and cloudy days,the non-uniformity of the structural temperature field becomes weak due to the weak solar radiation in the evening or in cloudy weather.Reducing the longitudinal length of the embedded part can effectively reduce the temperature deformation of the structure.In addition,different construction measures can be used to reduce the temperature deformation.The most effective measure is to change the type and color of the coating on the surface of the steel structure,followed by using the heat insulation board,and the effect is the worst when the section size of the steel member is changed.
万方数据
维普
