The tensile membrane action of unrestrained composite slabs simulated under fire conditions

被引：88

作者：

Bailey, CG ^{[1
]}

White, DS ^{[1
]}

Moore, DB ^{[1
]}

机构：

[1] Bldg Res Estab, Ctr Steel Construct, Watford WD2 7JR, England

来源：

ENGINEERING STRUCTURES | 2000年 / 22卷 / 12期

关键词：

membrane action; composite slabs; fire; large displacements;

D O I：

10.1016/S0141-0296(99)00110-8

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Following a major fire test programme on a full-scale, steel-framed building it was found that the composite flooring system, comprising lightweight concrete, anti-crack mesh reinforcement and steel deck, had a greater inherent fire resistance than suggested by current codified design methods. It was felt that this was due to tensile membrane action occurring in the slab at large displacements. This led to an independent test being conducted at the Building Research Establishment where a 9.5 m x 6.5 m composite slab, with nominal horizontal restraint to its edges, was tested to failure. To simulate the behaviour of the slab in fire, the steel deck was removed, leaving the concrete and anti-crack reinforcement, before load was applied. Tensile membrane action was shown to occur, with the failure load being approximately double that calculated using the classic yield line theory. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1583 / 1595

页数：13