open-web grid

Based on the clue that the open-web grid and the open-web sandwich plate are composed of the open-web trusses in several directions, the stiffness variety of the plane open-web truss is studied.
在理论分析的基础上，对空腹网架、空腹夹层板进行了刚度性能的分析，认为空腹网架、空腹夹层板是由多向空腹桁架交叉组成。