Experimental Study On The Static Performance Of Special-shaped Cast Steel Joints

In recent years,with the emergence of more and more large-span building and newtype of space structure,the cast-steel node becomes more and more complicated;Node’sconfiguration develop from the traditional form of K-type,T-type to the nodes withoutany regular shaped pattern.Complex shape will inevitably change the performance ofthe whole node force,Thus,the accumulation of the mechanical properties of variousstyles of nodes,and find out the appropriate law could provide a reliable basis for thefuture design optimization steel nodes.In this paper,the special-shaped cast-steel joint in steel roof structure of Chuzhougymnasium was simulated and analyzed by the full-scale model test and numericalsimulation.The mechanical property of special-shaped cast-steel joint in7differentdirection axial force was studied.By comparing the node full-scale model test and FEMsimulation results,the reliability of the simulation results was proved,andspecial-shaped node stress distribution was obtained.By selecting the ultimate failurecriterion,the safety bearing capacity of node was evaluated by using the finite elementsoftware.By comparing the safety bearing capacity of Ordinary steel node and cast-steelnode,it proved that the safty reserve of cast-steel node was higher.By the application oforthogonal test method,9node models with different wall thickness,the angle and theradius were designed.Through to compare and analyze the limit bearing capacity ofmodels,the influence of different parameters on the bearing capacity of the node wassummed up.The related results provide reference for the design and engineeringapplication of the cast-steel joint.