中空夹层钢管混凝土轴压短柱火灾后剩余承载力的试验研究

余鑫; 陶忠

doi:10.13204/j.gyjz200904003

中空夹层钢管混凝土轴压短柱火灾后剩余承载力的试验研究

doi: 10.13204/j.gyjz200904003

余鑫,
陶忠

1.
福州大学土木工程学院,福州 350108

基金项目:

福建省高等学校新世纪优秀人才支持计划项目(XSJRC2007-05)资助

详细信息

作者简介:
余鑫，男，1984年5月出生，硕士研究生。E－mail:yuxin1984@sing.com

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- 被引次数: 0
出版历程
- 收稿日期: 2009-01-05
- 刊出日期: 2009-04-20

RESIDUAL STRENGTH OF CONCRETE-FILLED DOUBLE-SKIN STEEL TUBULAR STUB COLUMNS AFTER EXPOSURE TO FIRE

Yu Xin,
Tao Zhong

1.
College of Civil Engineering,Fuzhou University,Fuzhou 350108,China

摘要

摘要: 对6个中空夹层钢管混凝土轴压短柱开展试验研究，试验的主要参数是截面形式(圆套圆、方套方和方套圆)以及受火与否。试验结果表明，受火后中空夹层钢管混凝土轴压短柱的承载力下降显著。在空心率相同的情况下，方套圆截面形式的试件其剩余承载力最高，而圆套圆截面形式的试件其延性最好。同时还可以发现，火灾后中空夹层钢管混凝土的轴压承载力下降幅度与传统的实心钢管混凝土接近。
- 钢管混凝土 /
- 短柱 /
- 受火 /
- 中空夹层 /
- 火灾后剩余承载力
Abstract: Test results of six concrete-filled double-skin steel tubular(CFDST) stub columns are presented.Circular hollow sections(CHS) and square hollow sections(SHS) were used to fabricate the inner and outer skins of the composite columns.The main parameters explored in this test programme were the section type(CHS inner and CHS outer,SHS inner and SHS outer,and CHS inner and SHS outer) and whether or not exposure to fire.It was found that the strength of the CFDST columns decreased significantly after exposure to fire.However,the residual strength of these innovative CFDST columns was still comparable to that of conventional concrete-filled steel tubular columns.Of all the three types of sections with a same hollow section ratio,the one with CHS inner and SHS outer shown the highest residual strength,whilst that with CHS inner and CHS outer shown the best ductility behaviour.
- concrete-filled steel tube /
- stub column /
- fire exposure /
- double-skin /
- post-fire residual strength

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参考文献(10)

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