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肋形楼盖是梁板协同工作体系，作者提出以十字交叉梁系杆元及矩形四节点板元共同集成总刚计算助形楼盖的直接刚度法，较传统的内力计算方法更为精确。对大量算例结果的分析表明：一般现浇板在次梁位置受正弯矩作用（下缘受拉）；考虑梁板协同作用，结构刚度可以提高３０％左右。
Rib-shaped floor slabs are beams and slabs cooperative work system. The authors proposed that the direct stiffness method for calculating the total helper floor directly by the cross-member beam element and the rectangular four-node slab element is more accurate than the traditional internal force calculation method. The analysis of the results of a large number of examples shows that the general cast-in-situ slab is subjected to a positive moment at the position of the secondary beam (the lower edge is pulled); considering the synergistic effect of the beam and slab, the structural rigidity can be increased by about 30%.