中文摘要：

在新型钢筋桁架发泡水泥夹芯叠合楼板中应用新型材料发泡水泥，能够实现楼板构件更轻、高效保温，且隔热隔声功能也优于钢筋桁架混凝土楼板。利用换算惯性矩方法对叠合楼板在施工阶段的短期刚度进行研究，得到发泡水泥夹芯叠合楼板的短期刚度计算公式，并通过算例对比研究发泡水泥预制层对楼板截面刚度的贡献作用。结果表明，发泡水泥预制层对截面刚度贡献很小，只占总刚度的10％左右，这主要是由于发泡水泥强度小、弹性模量小，所以在实际简化计算分析时，可不考虑发泡水泥预制层的作用。

英文摘要：

A new style floor slab by steel truss and foam cement is introduced in this paper .Due to the use of the new light-weight material foam cement , the floor slab has advantage over the traditional steel truss slab with concrete in further light-weight, thermal and sound insulation properties .In this paper, the short-term stiffness of the floor during the construction phase was studied by the effective moment of inertia method , and a formula was presented .The contribution of precast foam cement layer to the stiffness of the floor cross-section was analysed by an example .The result shows that the contribution of the foam cement layer is a small part of 10%, mainly due to the low strength and small elasticity modulus of the foam cement .Therefore, to simplify the calculation and analysis , the role of prefabricated foam cement layer can be ignored .