3Park J S,Stallings J M.Lateral torsional buckling of stepped beams with continuous bracing[J].Journal of Bridge Engineering,2005,10(1):87―95.
4Kukla S.Free vibrations and stability of stepped columns with cracks[J].Academic Press,2009,319:1301―1311.
5Vasquez Jorge,Riddell Rafael.A simple stepped column buckling model and computer algorithm[J].American Institute of Steel Construction Inc,2011,48:19―30
