Research on Simplified Calculation of Initial Bending Stiffness of T-Stubs
The validity of the finite element model was verified by comparing the existing test data and finite element analysis results of T-stubs connected with high-strength bolts.According to the finite element anal-ysis and theoretical analysis,the mechanical model of initial bending stiffness of T-stubs proposed in Euro-code 3 was simplified,and the expression for calculating the effective length of T-stubs in elastic stage was obtained,the calculation formula of initial bending stiffness of T-stubs was derived.Finally,35 groups of T-stubs considering the changes of flange width,flange thickness,bolt diameter,bolt grade and bolt spacing were selected to carry out finite element parametric analysis.The theoretical calculation results of initial bending stiffness were compared with those of finite element analysis,and the errors were mostly within 15％,which verified the validity of theoretical calculation formula.
T-stubsinitial bending stiffnesseffective lengthfinite element
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