Design issues of ear-type supports
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This post was last edited by kareale88 on 2019-6-29 22:07. In the calculation of the web plates for ear-type supports in the new support standard NB/T 47065.3, how is that reduction factor determined? I couldn’t find it in GB50017; I only saw the stability coefficient. Are these two the same thing? Also, why do the loads calculated using the parameters of standard supports in the formulas for gusset plates and bottom plates differ from those given by the standards?
Check the previous version of the steel structure design code.
I’ve also been looking into this recently. Indeed, there are differences between the coefficient k used in the NB/T 47065-2018 standard for supports and the method for calculating the allowable compressive stress of stiffening plates as specified in the NBT 47003.1-2009 standard for pressure vessels; the allowable compressive stress calculated using the former standard is lower, while that calculated using the latter standard is higher. Let’s discuss this further; my QQ number is 396321030
The k in Specification 47065 should be the stability factor φ for axially compressed members as specified in the steel structure codes
The calculation methods specified in NB/T47065-2018 and NB/T 47003.1-2009 are different; it is recommended to use the method outlined in the latter standard. The load values calculated according to the steel structure code 50017 in NB/T47065 are much lower than those obtained using NB/T 47003.1
:victory: learned* it