Analyses of flexural-torsional buckling of rolling H-section steel mono-overhanging beam
A study on flexural-torsional buckling of rolling H-section Steel mono-overhanging beam under uniform load is carried out.It assumes that when the control section of mono-overhanging Beam under uniform load is on the simply supported part,it can be simplified as a simply supported beam under uniform load and a concentrated couple.This paper has derived the formula of critical moment of simply supported beam under uniform load and a concentrated couple by using energy method,and compared the results by ANSYS finite element analysis,and the proposed formula is accurate enough.
Through the check and estimate about some hyperbolic humpback bridges along main highways in Hunan Province,the article introduces the main flaws of hyperbolic humpback bridges,and the reasons that cause them,then addresses some practicable measures of reinforcement reconstruction.