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上文~#提出的对空间平板网架采用力法求解,忽略了腹杆变形的影响,计算精度不够高。本文考虑了这一影响,并分别用精确法(空间桁架位移法)、梁元法(考虑剪切变形影响)、交叉梁系力法(上文~#)及本文所提出的计算方法,对同一几何尺寸的两向正交正放网架进行内力分析,结果证明本文比上文的计算精度提高10～20％左右,更具有实用价值。另外,在上文的基础上对网架的各种支承条件下的基本挠度方程给予补充与完善,并给予简单的表达式以利设计计算。
The force plane method is applied to the space plate grid proposed by # ~ above, neglecting the influence of the deformation of the web, and the calculation accuracy is not high enough. This paper considers this effect and applies the exact method (space truss displacement method), beam element method (taking into account the influence of shear deformation), the method of cross beam force (above ~) and the calculation methods proposed in this paper. The size of the two-way orthogonal nets for internal force analysis, the results show that the calculation accuracy of the above than the above increase of about 10 to 20%, more practical value. In addition, on the basis of the above, the basic deflection equation under various supporting conditions of the grid frame is supplemented and improved, and a simple expression is given to facilitate the design calculation.