合肥新桥国际机场T2航站楼足尺铸钢节点受力性能研究OA

The roof of the T2 terminal of Hefei Xinqiao International Airport uses complex cast steel joints.In view of the multi-member intersection and complex force conditions at key cast steel joints,mechanical performance tests and finite element analyses were carried out on the full-scale cast steel joints used in the actual project of Xinqiao International Airport to verify the safety and reliability of the design.The mechanical performance test of full-scale cast steel joints showed that the joints remained in a linear elastic state under twice the design load.Their strains changed approximately linearly with the load,and no damage occurred throughout the test.A finite element analysis model of the cast steel joints was constructed for relevant analyses.The results showed that the finite element analysis results agreed well with the test data,indicating that the finite element model could effectively simulate the actual stress state of the joints.The failure behavior of cast steel joints was further analyzed by finite element simulation.The analysis showed that the cast steel joint entered the yield stage under 7 times the design load and reached its ultimate bearing capacity under 10.69 times the design load.This indicates that the design of the cast steel joint is safe and reliable,meets code requirements,and has high safety redundancy.