| Hollow Section Structures(HSS)is widely used in engineering.There are many kinds of tube joints with complicated force,which has great research significance.At present,the research on tube joints have been carried out systematically at home and abroad,but there are less studies on K-type rectangular hollow sections(RHS)joints connected with longitudinal plates.In this paper,the static behavior of non-through branch plate K-type RHS joints and through branch plate K-type RHS joints would be conducted by ANSYS-a finite element software.Firstly,the failure modes between two types of joints were analyzed.Secondly,the stress and deformation were studied.Finally,the load paths were obtained,and then the load of the joints can be equivalently simplified according to the load paths.The applicability of the existing ultimate flexural capacity formula of the T-type RHS joints to the non-through branch plate K-type RHS joints was discussed.The influence of the restraint at the end of the strut on the ultimate strength was analyzed.The calculation method of the ultimate strength by simplifying load to the the chord connecting upper surface was proposed,which comprehensively considered the equivalent bending moment and shear force.The mechanical properties of the joints in the truss were analyzed.For the truss connected by non-through branch plate joints,the mechanical properties of the truss joints and the individual joints with different constraints were compared,and a reasonable individual joint model was found to simulate the true stress in the truss.The applicability of the ultimate strength calculating formula of the individual joints in the truss was discussed.For the two types of trusses,the influence of the member length on the ultimate capacity of joints was studied,and the failure process for trusses was analyzed.Finally,the solid element model of the truss was simplified according to the mechanical properties in order to simplify the truss design. |
PDF Full Text Request