【摘要】 通过对桥梁结构几何非线性问题基本原理的阐述,推导出结构几何非线性计算的改进的CR列式法的计算公式,并给出CR列式法实现步骤;介绍了CR列式法中有关梁单元弧长的计算方法,给出了梁单元较为精确的切线刚度矩阵;建立了悬臂梁预拱线形计算的几何非线性模型,计算结果表明,本文计算方法具有较高的精度和稳定性。更多还原

【Abstract】 This paper derives an enhanced nonlinear formula of CR method to design bridge geometry,which is based on the principle of bridge geometrically nonlinear design.The study can compute the unit arc length in CR formulation,propose the tangent stiffness matrix of beam element,and develop the nonlinear model to precisely calculate the pre-camber of cantilever construction.The computational results reveal that the proposed model can provide high accuracy and stability in bridge geometry design.更多还原