【摘要】 提出了一种以剪力滞平衡微分方程的齐次解作为梁段位移的模式,建立了考虑弯、扭、剪力滞耦合的有限段模型.对两跨连续曲线箱梁进行了模型试验,有限段法的计算结果与模型试验值和有限元法的计算结果吻合.通过实例计算,分析了在集中荷载、均布荷载作用下,支座型式对连续曲线箱梁剪力滞效应的影响.研究表明,支座型式对连续曲线箱梁剪力滞效应的影响较大,荷载作用形式对剪力滞效应影响明显.更多还原

【Abstract】 Based on the homogeneous solutions of equilibrium differential equations for shear lag as the displacement patterns of finite segment,a finite segment model taking bending,torsion and shear lag into consideration was established.A corresponding program was designed to calculate the shear lag of continuous curved box girders.The shear lag of a two-span continuous curved box girder was investigated experimentally.The numerical result based on the finite segment model accords with the model test and FEM(finite element method) numerical results.An actual example was given to investigate the shear lag effects of a continuous curved box girder respectively under concentrated load and uniformly-distributed load.The research results show that the type of supports and the form of loads have an obvious influence on the shear lag effect of a continuous curved box girder.更多还原