锈蚀钢骨混凝土梁轴力与剪力计算

均布荷载作用下,锈蚀钢骨混凝土梁轴力与交接面的剪力体现了钢骨与混凝土之间的粘结性能,两者都是影响梁承载能力的重要因素。利用弹性理论,结合锈蚀钢骨混凝土梁的受力特征,建立了考虑钢骨锈蚀率影响的轴力微分方程,给出了均布荷载下轴力与交接面剪力的计算公式。计算结果表明,均布荷载作用下轴力与交接面剪力随着钢骨锈蚀率的增加而减小,随着荷载的增大而增大,且钢骨锈蚀率越大,轴力与交接面剪力下降的也就越快。

CALCULATED INTERFACE SHEAR AND AXIAL FORCE OF CORRODED STEEL REINFORCED CONCRETE BEAMS

Under uniformly distributed load,the axial force and interface shear indicate bond behavior between the steel and concrete,which are the main factors affecting bearing capacity of beam.The differential equation of axial force considering the corrosion ratio of steel affecting is established based on elastic theory and combining the mechanical characteristics of corroded steel reinforced concrete beam.And the calculated formulas of axial force and interface shear under uniformly distributed load are given.Results of the calculation show that axial force and interface shear under uniformly distributed load reduce with the increase in corrosion ratio of steel,and increase with the raise of load.The more corrosion ratio of steel increases,the more axial force and interface shear reduce.