地下室顶板无梁楼盖事故原因及设计要点研究  

Research on Accident Causes and Design Points of Flat Slabs on Basement Roof

作　　者：张小明 吴培培 ZHANG Xiaoming;WU Peipei(Shunde Architectural Design Institute Co.,Ltd.Foshan 528300,China)

机构地区：[1]佛山市顺德建筑设计院股份有限公司,广东佛山528300

出　　处：《广东土木与建筑》2023年第11期53-56,共4页Guangdong Architecture Civil Engineering

摘　　要：近年来,地下车库无梁楼盖的坍塌事故屡屡发生,其中原因复杂,有设计、施工等诸多因素,都是一个节点的破坏就会引起整个结构的垮塌;但因为无梁楼盖结构可以有效地降低层高,具有减少基坑深度、板底平整美观、施工快、节省模板等优点,在设计中还是在大量使用,因此本文针对附近两个事故的柱帽节点,采用ABAQUS有限元软件做了详细的分析对比;发现反柱帽设计安全度对比正柱帽低,承载能力差别明显,与规范冲切值相比,反柱帽的安全系数不足。因此,针对某些特殊的做法(如反柱帽)应多做分析及实验,才好在实际中推广。In recent years,the collapse accidents of flat slabs of underground garage occurred repeatedly,with complex reasons such as design,construction,and many other factors.The destruction of a single node can cause the collapse of the whole structure;However,because the flat slab can effectively reduce the storey height,reduce the depth of the foundation pit,make the bottom of the slab flat and beautiful,fast construction,and save templates,it is still widely used in design.Therefore,this article aims to analyze and compare the column cap nodes of two nearby accidents in detail using ABAQUS finite element software;The results showed that the safety of the anti-column cap design was lower than that of the positive column cap,and the difference in load-bearing capacity was significant.Compared with the standard punching value,the safety factor of the anti-column cap was insufficient.Therefore,for certain special practices(such as anticolumn caps),more analysis and experiments should be conducted in order to promote their application in practical engineering.

关 键 词：无梁楼盖 柱帽 冲切破坏面 板柱节点 托板 

分 类 号：TU312.3[建筑科学—结构工程]