以石膏为模盒的钢筋混凝土密肋空腔大板试验研究  

Experimental study of gypsum-case embedded RC dense rib cavity slab floor

作　　者：王其明[1] 马克俭[1,2] 陈志华[1,3] 孙涛[1] 

机构地区：[1]天津大学土木工程学院,天津300072 [2]贵州大学空间结构研究中心,贵州贵阳550003 [3]滨海土木工程结构与安全教育部重点实验室(天津大学),天津300072

出　　处：《空间结构》2012年第3期3-7,67,共6页Spatial Structures

基　　金：国家自然科学基金资助项目(50968004)

摘　　要：对某钢筋混凝土框架核心筒结构体系的楼盖进行了研究.该楼盖采用石膏为模盒的钢筋混凝土密肋空腔井字大板楼盖体系,取该楼盖跨度为8.4m,宽度为8.4m的部分现场进行了均布竖向荷载下的加载试验.以百分表为位移测量工具共布置了27个测点,采用红砖和水泥砖分四级对该楼盖部分进行了加荷,考察了其在最大使用荷载下的挠度,并与有限元法和等代井字梁法的计算挠度进行了对比分析.试验结果表明:以石膏为填充的密肋空腔井字大板具有较强的空间作用;实测挠度值和Ansys分析结果基本一致,且远小于等代井字梁法的计算挠度值;有限元法和等代井字梁法计算的板的挠度变化趋势和试验结果比较吻合.该试验结果可为今后该类大板体系的设计、研究和应用提供参考.A floor of RC frame-core structure system is studied in this paper. It is a gypsum-case embedded dense rib cavity floor system. A vertical bearing capacity test was employed to a gypsum-case embedded RC dense rib cavity floor with span and width of 8. 4 m. 27 dial indicators were used to observe the displacement. Using red brick and cement brick, load was acted by four steps. The deflection under the largest using load was obtained. The FEM results and results calculated by equivalent well-form beam method were compared. It shows spatial effect of gypsum-case embedded RC dense rib cavity floor is distinct. FEM results agree with the test, far being less than the result of equivalent well-form beam method. Deflection developing trend of numerical simulation is in substantial agreement with the test. The test will offer reference for further study of the design and application of this floor system.

关 键 词：石膏模盒 钢筋混凝土 空腔大板 挠度 

分 类 号：TU375.2[建筑科学—结构工程]