COLLAPSE BEHAVIOR EVALUATION OF STEEL FLOOR STRUCTURES WITH UNINSULATED SECONDARY BEAMS UNDER ELEVATED TEMPERATURES IN FIRES

被引：0

作者：

Takagi J. ^{[1
]}

Wang S. ^{[1
]}

Kurihara J. ^{[1
]}

Kohno M. ^{[2
]}

Matsuyama K. ^{[2
]}

机构：

[1] Tokyo Metropolitan University, Japan

[2] Tokyo University of Science, Japan

来源：

Journal of Structural and Construction Engineering | 2022年 / 87卷 / 799期

关键词：

collapse mechanism; FEM analysis; fire; floor structure; heating and loading test; steel structure;

D O I：

10.3130/aijs.87.944

中图分类号：

学科分类号：

摘要：

The collapse behavior of steel floor structures under elevated temperatures in fires was investigated by detailed FEM analyses. The floor structure in the fire compartment is composed of uninsulated secondary-beams and steel-deck composite slabs, supported by insulated primary-beams, adjacent to unheated floor structures. Under the elevated temperatures, the secondary-beams and bolted simple connections lose strength and alternatively slabs carry the vertical load associated with large sagging deformation. The floor structure collapses when the reinforcement around the secondary-beam ends fails. The behavior and failure mechanism observed in the FEM analyses were confirmed by a simultaneous heating and two-directional loading experiment. © 2022 Architectural Institute of Japan. All rights reserved.

引用

页码：944 / 953

页数：9

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