Fire resistance of concrete-filled steel tube columns with preload. Part I: Experimental investigation

Fire resistance of concrete-filled steel tube columns with preload. Part I: Experimental investigation
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预载钢管混凝土柱的耐火性能。

DOI:
10.1016/j.compstruct.2019.110994
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发表时间:
2019-09
影响因子:
6.3
通讯作者:
Jianqiao Ye
Jianqiao Ye
中科院分区:
工程技术1区
文献类型:
--
作者:
Min Yu;Tan Wang;Weijun Huang;Huanxin Yuan;Jianqiao Ye

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预应力是钢管混凝土结构设计和施工中必须研究和考虑的重要参数。然而,在现有的钢管混凝土抗火设计方法中,没有考虑预压对钢管混凝土抗火性能的影响。本文对12根钢管混凝土柱在有无预紧力作用下的受热过程、破坏形态、温度响应和结构响应进行了试验研究。试验结果表明,钢管预紧力对部分柱的抗火性能有显著影响。对这一重要观测的进一步研究将在配套论文[24]中进行数值计算,以进行更全面的参数研究。
Preload in a cast-in-situ concrete-filled steel tube (CFST) structure is an important parameter that has been studied and considered in design and construction. However, the impact of a preload on fire resistance of CFST has not been taken into account in the existing design method of CFST under fire. In this paper, twelve CFST columns with and without preload in the steel tubes are experimentally studied to investigate their heating process, failure modes, thermal and structural responses. The test results show that preload of the steel tube has significant impact on the fire resistance of some of the columns. Further investigations on this important observation will be done numerically in a companion paper [24] to carry out a more comprehensive parametric study.
DOI: 10.1061/(asce)0899-1561(1994)6:2(169
发表时间: 1994-05
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