【摘要】 提出以剪力滞平衡微分方程的齐次解作为梁段单元的位移模式,建立了考虑弯、扭、剪力滞耦合的有限段模型.利用刚度法以及功能原理推导出梁段的单元刚度矩阵和荷载列阵,并编制计算程序.制作了一两跨连续曲线箱梁有机玻璃实验模型,分别进行了在集中荷载和均布荷载作用下的剪力滞效应试验研究,其结果验证了方法的正确性.研究表明,曲线箱梁内侧正应力比外侧的大.更多还原

【Abstract】 The homogeneous solutions of the differential equations for shear lag used as the displacement patterns of the finite segment were presented.A finite segment model with consideration of bending,torsion and shear lag was established.The stiffness matrix and load column matrixes were obtained in terms of the directed stiffness method and working-energy principle,and a program was designed to calculate the shear lag of the curved box girders.A perspex glass model of a two-span continuous curved box girder was made.The tests of the perspex model were used to study the shear lag effects respectively under concentrated load and uniformly distributed load.The results of the model tests verified perfectly the accuracy of the present method,and showed that the inside stress was larger than the outside one on curved box girders.更多还原