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.
在理論分析的基礎上，對空腹網架、空腹夾層板進行了剛度性能的分析，認爲空腹網架、空腹夾層板是由多曏空腹桁架交叉組成。