Experiments and Numerical Simulations for the Intersecting Joints of the Steel Structure of Shenzhen Universiade Comprehensive Transportation Hub Station
To investigate the mechanical properties of the circular main pipe intersecting with the inverted trapezoidal branch pipe at the station building of Shenzhen Universiade Comprehensive Transportation Hub,full-scale joint specimens were subjected to loading tests,and numerical simulations were conducted by using the ABAQUS finite element software.The experimental results agreed well with the numerical simula-tions,demonstrating elastic behavior under design loads but failure occurred at 2.3 times the design load.Utilizing validated finite element models,the study examined the influence of various parameters on the bearing capacity of joints.Increasing the ratio of the flange width of the branch pipe to the outer diameter of the main pipe,as well as the angle between the axes of the branch pipe and the main pipe,could enhance the bearing capacity of the joint.Furthermore,a formula for calculating the bearing capacity correction factor of inverted trapezoidal section intersecting joints was proposed,offering a foundation for engineering design considerations.
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