基于剪切效应的加固梁弯曲性能研究

Research on Bending Properties of Reinforced Beams Based on Shear Effect

为研究剪切对均布载荷作用下加固梁弯曲变形影响的问题,采用材料力学方法推导出加固梁的弯曲正应力公式、挠度表达式,弹性理论计算结果证明该方法的计算精度较高。研究结果表明:在均布载荷作用下剪切对梁挠度、正应力都有较大的影响,其中剪切对梁挠度的影响更大些。由于材料力学解存在偏于不安全的问题,建议均布载荷作用下加固梁弯曲变形的计算时要考虑剪切的影响。

The effect of shear on the bending deformation of strengthened beam under uniform load was studiedThe bending normal stress formula and deflection expression of the strengthened beam were derived by material mechanicsBased on the calculation results of elastic theory,it was proved that the calculation precision of this method was highThe research results showed that shear has a great effect on deflection and normal stress of beam under uniform load,and the effect of shear on deflection of beam is greaterBecause of the unsafe problem of the solutions of material mechanics,it was suggested that the shear effect should be taken into account in the calculation of bending deformation of strengthened beam under uniform load.