【摘要】 把正交正放类网架结构简化为构造上正交异性的夹层板,采用考虑剪切变形的具有三个广义位移的平板弯曲理论来分析,给出了网架结构在局部荷载作用下的内力、位移解析计算公式,并用有限元方法进行了验证。更多还原

【Abstract】 In this paper the orthogonal and ortho-laidspace grids are assumed as an orthotropic sandwich plate,which is analyzed by the theory of plate with considerationof shear deformation and three generalized displacements.The calculating formulas for internal forces and displace-ments of double-layer space grids under local loading aregiven based upon ESPM, and have been validated by thefinite element method (ANSYS). In general, the differ-ences between ESPM and FEM are less than 10% and 5%for internal forces and displacements, respectively. So thismethod can be used in the design of double-layer spacegrids.更多还原