TY - JOUR N2 - The analytical approach is used for checking the stability of laterally unrestrained bisymmetric beams. The stability equations for simply supported beams are solved approximately using the Bubnov–Galerkin method [4]. The lateral buckling moment depends on bending distribution and on the load height effect. Each of applied concentrated and distributed loads, may have arbitrary direction and optional coordinate for the applied force along the cross section’s height. Derived equations allow for simple, yet fast control of lateral buckling moment estimated by FEM [15]. L1 - http://journals.pan.pl/Content/84054/mainfile.pdf L2 - http://journals.pan.pl/Content/84054 PY - 2015 IS - No 4 EP - 140 KW - lateral buckling moment KW - simply supported beams with free warping KW - bisymmetric I-shaped beams KW - analytical solution A1 - Bijak, R. PB - WARSAW UNIVERSITY OF TECHNOLOGY FACULTY OF CIVIL ENGINEERING and COMMITTEE FOR CIVIL ENGINEERING POLISH ACADEMY OF SCIENCES DA - 31.12.2015 T1 - The lateral buckling of simply supported unrestrained bisymetric I-shape beams SP - 127 UR - http://journals.pan.pl/dlibra/publication/edition/84054 T2 - Archives of Civil Engineering ER -