相对两面受火方钢管混凝土耐火极限

吕学涛; 杨华; 张素梅

doi:10.13204/j.gyjz201206031

相对两面受火方钢管混凝土耐火极限

doi: 10.13204/j.gyjz201206031

吕学涛^1,2,3,
杨华²,
张素梅²

1.
1 辽宁工程技术大学建筑工程学院辽宁阜新 123000;
2.
2 哈尔滨工业大学土木工程学院哈尔滨 150090;
3.
3 辽宁工程技术大学力学博士后流动站辽宁阜新 123000

基金项目:

中央高校基本科研业务费专项基金(HIT.NSRIF.2010015);国家自然科学基金资助项目(50708028);2010年教育部留学归国人员启动基金资助项目

详细信息

作者简介:
吕学涛，男，1979年出生，博士，讲师

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- 被引次数: 0
出版历程
- 收稿日期: 2011-02-21
- 刊出日期: 2012-06-20

FIRE RESISTANCE OF CONCRETE-FILLED SQUARE HOLLOW SECTIONS BEING EXPOSURE TO TWO-OPPOSITE-SIDE FIRE

1.
1. College of Engineering and Architecture,Liaoning Technical University,Fuxin 123000,China;
2.
2. School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China;
3.
3. Research Station on Mechanics for Postdoctoral Fellows,Liaoning Technical University,Fuxin 123000,China

摘要

摘要: 方钢管混凝土柱的抗火性能与设计是其在工程实践中的关键问题之一,因而众多国内外学者对此进行了研究。但是,现有研究及其成果和现行规范或规程大多假设其四面均匀受火,而实际火灾中方钢管混凝土柱也可能存在单面、两面及三面等非均匀受火边界。受火边界的改变,使非均匀受火的方钢管混凝土柱受力机制和抗火性能与四面受火情况有所不同。为此,研究了一种典型非均匀受火边界,即相对两面受火条件下方钢管混凝土柱的抗火性能,在大量参数分析的基础上,提出了相对两面受火时方钢管混凝土承载力影响系数的简化公式,可用于评估该火灾条件下方钢管混凝土柱耐火极限,以供工程实践参考。
- 相对两面受火 /
- 方钢管混凝土柱 /
- 耐火极限 /
- 温度场 /
- 剩余承载力
Abstract: The fire resistance behaviour and design of concrete-filled SHS(square hollow sections) columns are oneof the key issues in practice, thus many researchers abroad and at home are concerned with this field. Previousresearch and codes are based essentially on a four-side heated boundary hypothesis. However, concrete-filled SHScolumns may be exposure to non-uniform fires, including one-side fire, two adjacent sides fire and three-side fire.There are different fire resistance behaviors between non-uniform fire conditions from four-side fire condition. Theresearch herein focuses on one of the non-uniform fire types-two-opposite-side fire, to study the fire resistance ofconcrete filled SHS. Based on parametric analysis, simplified calculation formula for predicting the residual loadbearing capacity was deduced through massive calculation and the formula is expected to be used in the design of thefire resistance of the concrete-filled SHS being exposure to two-opposite-side fire.
- two-opposite-side fire /
- concrete-filled square hollow section /
- fire resistance /
- temperature field /
- residual bearing capacity

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参考文献(10)

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