考虑剪切变形的波形钢腹板组合梁的挠度计算

Calculation of Deflection for Composite Beams with Corrugated Steel Webs Considering Shear Deformation

采用能量变分法,建立了考虑剪切变形影响时波形钢腹板组合梁的挠曲线微分方程。利用此挠曲线微分方程,得到了简支波形钢腹板组合梁在不同荷载作用下由剪切变形产生的跨中挠度的计算公式。通过与空间有限元模型进行对比分析,表明理论计算公式是准确的。

Consi dering the influence of the shear deformation, the deflection differential equation of string of the composite beam bridge with corrugated steel webs is established by energy variational method. Therefore, having the deflection differential equation of string, a calculation formula of mid-span deflection which is caused by shear deformation, and the short-term reduced rigidity of the simply supported composite beam bridge with corrugated steel webs under different loads,are provided. Compared with the space finite element model, it shows that the theoretical formula is accurate.