孙澄潮，刘刚君
    (泛华建设集团有限公司，北京100082)

[摘要] 结构的竖向刚度是考虑基础和上部结构共同工作的重要参数。考虑上部结构刚度对于减小基础的内力和沉降差以及调整上部结构的内力是不可忽视的。框架结构的竖向刚度是依靠框架梁的抗剪刚度提供的，并随着柱的轴变刚度增加而增强。推导当地基发生非线性变形时，上部框架梁两端的相对竖向变形随高度的衰减系数 Ψ的计算公式，从而得出框架的竖向刚度及框架结构承受的整体弯矩。对一般规则框架制成 Ψ值表，可供工程设计应用。
[关键词] 框架结构；竖向刚度；梁端相对变形；衰减系数

    Calculation of framed vertical rigidity when the subgrade deforms
    Sun Chengchao, Liu Gangjun
    ( Pan-China Construction Group Co., Ltd., Beijing 100082, China)

Abstract: The vertical rigidity of structure is an important parameter for common work of foundation and upper structure. It can not to be ignored for consideration the structure rigidity of upper structure, because it is relative to reduce internal force and disparity in settlement of foundation and adjust the internal force of upper structure. The vertical rigidity of frame structure is provided with shear rigidity of frame beam and it's strengthened with the increase of compression rigidity of the column. The formula of coefficient of attenuation along with height of relatively deflection at end of beam on upper frame is derived, when subgrade occur nonlinear deformation. Thus it is abstained the vertical rigidity of frame and the bearing whole moment of frame structure. It is compiled table of volume Ψ for general regular frame. It can be applied in engineering design.
Keywords: frame structure; vertical rigidity; relatively deflection at end ofbeam; coefficient of attenuation