Enhancing the fire resistance of composite floor assemblies through the use of steel fiber reinforced concrete

被引：50

作者：

Fike, Rustin ^{[1
]}

Kodur, Venkatesh ^{[1
]}

机构：

[1] Michigan State Univ, Dept Civil & Environm Engn, E Lansing, MI 48824 USA

来源：

ENGINEERING STRUCTURES | 2011年 / 33卷 / 10期

关键词：

Steel fiber reinforced concrete (SFRC); Tensile membrane action; Beam-slab assembly; Steel frames; Fire resistance; Fire protection; MEMBRANE ACTION; SLABS;

D O I：

10.1016/j.engstruct.2011.06.011

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents a strategy for achieving the required fire resistance in composite floor systems through the use of steel fiber reinforced concrete (SFRC). Both experimental and numerical studies were carried out to evaluate the fire performance of floor systems comprising unprotected steel beams and concrete/SFRC deck slabs. The results from these studies show that SFRC composite deck slabs develop significant tensile forces (through tensile membrane action) that transfer load from fire-weakened steel beams to other cooler parts of the structure. Preliminary results indicate that the combined effect of composite construction, tensile membrane action, and the improved properties of SFRC under realistic fire, loading, and restraint conditions can provide sufficient fire resistance in steel beam-concrete deck slabs without the need for external fire protection on the floor assembly. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：2870 / 2878

页数：9

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