（1 铜仁学院农林工程与规划学院， 铜仁 554300； 2 贵州大学建筑与城市规划学院， 贵阳 550025； 3 贵州理工学院土木工程学院， 贵阳 550003）

［摘要］9区格式无梁楼盖是采用拓扑优化的理论方法并结合结构理论及工程经验提出的一种新型现浇空心无梁楼盖结构。对该类结构做了竖向荷载作用下的静力试验研究。结果表明：结构静力学性能较优，在超载150%的情况下挠度仍满足要求，其变形特征与实体板类似；达到设计荷载前结构表现出较好的线弹性性能；加载过程中，板底裂缝首先产生在跨中矩形区格，并由矩形区格往周边梯形区格和肋梁边发展，板面裂缝主要产生在支座区域；肋梁可起到阻滞裂缝发展的作用，网格布置合理；整个加载-卸载过程中，挠度和裂缝宽度较小，结构始终保持完好的几何形状并具承载能力；该类结构适用于荷载和跨度较大的多层建筑的楼盖系统。

［关键词］9区格； 无梁楼盖； 试验研究

中图分类号：TU375文献标识码：A文章编号：1002-848X(2019)06-0075-04

Static experimental study on nine-grid girderless floor

Hu Song1, Huang Yong2, Cao Wenze3

(1 College of Agroforestry Engineering and Planing, Tongren University, Tongren 554300, China; 2 School of Architecture and Urban Planning, Guizhou University, Guiyang 550025, China; 3 School of Civil Engineering, Guizhou Institute of Technology, Guiyang 550003, China)

Abstract:Based on topology optimization theoretical method and combined with structural theory and engineering experience, nine-grid girderless floor is proposed as one new kind of cast-in-situ girderless hollow floor. Static experimental study  on this structure under vertical loading was conducted. The results show that the structure has good statics performance, and the deflection still meets the requirement under the condition of 150% overload, and the deformation characteristic is similar to that of  the solid floor. The structure showed good linear elastic properties before reaching the design load; during loading process, the crack in the bottom of floor firstly occurred in the rectangular grid in the middle of the span and then extended to the perimeter trapezoidal grid and ribbed beam, and the crack in the surface of floor mainly occurred in the support area. The rib beams can prevent the development of crack and the grid arrangement is reasonable. In the process of loading and unloading, the deflection and the width of crack were small and the structure maintained sound geometrical shape and bearing capacity. This kind of structure is suitable for floor system of multi-story with long span and heavy load.

Keywords:nine-grid; girderless floor; experimental study

*国家自然科学基金项目（51368009），贵州省教育厅青年科技人才成长项目（黔教合KY字［2016］300号）。

通讯作者：黄勇，博士，教授，Email：yhuang@gzu.edu.cn。