The Effect Of Joint Stiffness On The Static And Dynamic Behavior Of Console Mode Steel Truss

Welded tubular joints have been more and more utilized in space and long spanstructures over the recent years. The console model steel tube structure is highlysensitive to joints and most studies of which are mainly focused on the calculation ofthe joints' load-carrying capacity. Even if the traditional theory is still adopted duringanalysis, the impact of the joint stiffness is basically not taken into consideration.This thesis establishes overall steel tube unit model with different joint stiffnessaccording to their own features, and overall statistical analysis of static and dynamicforce is concluded.The joints' calculation in console model steel tube is widely applied in thestadium and train station with the presumption of an ideal pin-joint. Therefore furtheranalysis is needed to know how huge is the difference in the calculation of the tubewith joints' stiffness in the real world. First, in accordance with the design of A trusswelded K type cleaved console model round steel tube in the Student Activity Centerin Ningxia University, different size of bars and joints' cleavage were adopted tochange the tube joint stiffness,5groups of tubes in total were designed to respectivelyestablish the Shell Model, the Ideal Link Model, the Ideal BEAM Model, the SIMModel, the SIM Model that takes the plasticity of the axial spring lever into account,the revolving spring Model, the Micro-bar Model that takes the plasticity of the axialspring lever into consideration for static analysis. So complicated is the dynamicanalysis that only one group of tube establishing rigid-joint, pin-joint and semi-rigidjoint models to explore and study the impact of joint stiffness on the overall tubedynamic capacity.The impact of the joint stiffness on static force property is mainly throughreaction of shell element model, whose rare impact of earthquake is roughlycalculated mainly through the comparison of steel-joint, pin-joint and semi-rigid jointmodels which reflects the impact of joint stiffness on the overall tube under dynamicforce.