About the author:

1. Gansu Construction Investment Civil Engineering Construction Group Co. , Ltd. , Lanzhou,Gansu 730070, China; 2. School of Civil Engineering, Lanzhou University of Technology,Lanzhou, Gansu 730050, China; 3. Western Research Center of Disaster Mitigation inCivil Engineering Ministry of Education, Lanzhou, Gansu 730050, China

Abstract:

For desert areas where special environments such as large temperature differences, suddentemperature drops, and strong solar radiation often occur, the strong temperature effect will have asignificant impact on the spatial structure during the construction phase. Taking the unloading process ofthe reticulated shell of Minqin Sports Center Gymnasium as an example, the support displacement methodis used to simulate and analyze the unloading construction process of the double⁃layer reticulated shell,and parametric analysis of different boundary conditions and different temperature effects of the structureduring the unloading process is carried out. At the same time, combined with the temperature, stress anddeformation data of health monitoring, the impact of temperature effects on the unloading stage of thestructure is analyzed. The results indicate that the effect of solar radiation and changes in boundaryconstraints directly affect the stress variation law during the unloading process. Under fixed constraints,the unloading stress considering only self weight is only 10% ~ 30% of the temperature stress. In actualconstruction, the calculated value of large⁃span steel structure considering temperature effect is closer tothe measured value, and the influence of special temperature environment on structural mechanicsperformance needs to be considered.