波形钢腹板组合梁自振特性研究

Research on the natural vibration characteristics of composite beams with corrugated steel webs

为探讨剪力滞效应和剪切变形对波形钢腹板组合箱梁桥的竖向弯曲振动频率的影响,采用三种不同的计算理论:经典梁理论、铁木辛柯梁、欧拉梁,分别计算出试验梁的竖向弯曲振动频率,并结合ANSYS模型得出有限元值,最终得出剪力滞效应和剪切变形考虑的必要性。

In order to investigate the effects of shear lag effect and shear deformation on the vertical bending vibration frequency of composite box girder bridges with corrugated steel webs,three different calculation theories are used:classical beam theory,ironwood sinker beam,euler beam.The vertical bending vibration frequency of the test beam was calculated respectively,and the finite element value was obtained by combining the ANSYS model.Finally,the shear lag effect and the necessity of considering the shear deformation were obtained.