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[33310] Artykuł:

Lateral-torsional buckling of beams elastically restrained against warping at supports

Czasopismo: Archives of Civil Engineering   Tom: LXI, Zeszyt: 4, Strony: 155-174
ISSN:  1230-2945
Wydawca:  POLISH ACAD SCIENCES INST FUNDAMENTAL TECHNOLOGICAL RESEARCH, PAWINSKIEGO 5B, 02-106 WARSAW, POLAND
Opublikowano: Grudzień 2015
 
  Autorzy / Redaktorzy / Twórcy
Imię i nazwisko Wydział Katedra Procent
udziału
Liczba
punktów
Rafał Piotrowski orcid logoWBiAKatedra Mechaniki, Konstrukcji Metalowych i Metod Komputerowych *507.50  
Andrzej Szychowski orcid logoWBiAKatedra Mechaniki, Konstrukcji Metalowych i Metod Komputerowych *507.50  

Grupa MNiSW:  Publikacja w recenzowanym czasopiśmie wymienionym w wykazie ministra MNiSzW (część B)
Punkty MNiSW: 15
Klasyfikacja Web of Science: Article


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Keywords:

critical moment for lateral torsional buckling LTB  elastic end section restraint against warping  end-plates  the energy method  power polynomials 



Abstract:

The study presents the results of theoretical investigations into lateral torsional buckling (LTB) of bi-symmetric I-beams, elastically restrained against warping at supports. Beam loading schemes commonly used in practice are taken into account. The whole range of stiffness of the support joints, from free warping to warping fully restrained, is considered. To determine the critical moment, the energy method is used. The function of the beam twist angle is described with power polynomials that have simple physical interpretation. Computer programs written in symbolic language for numerical analysis are developed. General approximation formulas are devised. Detailed calculations are performed for beams with end-plate joints. Critical moments determined with programs and approximation formulas are compared with the results obtained by other researchers and with those produced by FEM. Very good accuracy of results is obtained.