Research and discussion on design method of torsional members of steel structure
Standard for design of steel structures(GB 50017-2017)in China does not provide detailed introduction to the specific design and calculation methods for torsion members.In order to have a more accurate grasp and more reasonable design of the force situation of the torsional members,the design method of torsional rods in section H3.1 of the American steel structure standard ANSI/AISC 360-16 were introduced in detail,and the formula for calculating the design value of torsional strength design value Tc in this standard was analyzed,and the stress distribution and stress ratio of the members corresponding to the torsion strength design value Tc in the standard was derived and verified.The influence of the width-thickness ratio of the flange and web,and the height-width ratio of the cross-section on the torsion strength design value T of the members was explored.The recommended range of cross-section sizes for the calculation formula of the torsion strength design value Tc was proposed.The result show that when the cross-section thickness of the members is consistent under pure torsion state,the material performance can be fully utilized and the design is more economical,which provides theoretical reference for the design and calculation of steel structure torsional members in practical engineering.
steel structuretorsional memberAmerican steel structure standardtorsional strength design valuestress ratio
NETL
NSTL
万方数据
