Design of Concrete-Filled Hollow Structural Steel Columns for Fire Endurance
Design of Concrete-Filled Hollow Structural Steel Columns for Fire Endurance
复制标题
DOI：
10.62913/engj.v37i1.733
复制
发表时间：
2000-03
期刊：
影响因子：
--
通讯作者：
Venkatesh R. Kodur;D. Mackinnon
中科院分区：
文献类型：
--
作者：
Venkatesh R. Kodur;D. Mackinnon
钢结构空心截面(HSS)从美学和结构角度的好处早已得到加拿大建筑师和工程师的认可，最近在美国也是如此。然而，当建筑规范要求结构防火时，对于暴露的构件来说，提供这种保护的成本可能会很高。用混凝土填充HSS柱不仅通过在环境温度下的复合作用提高构件的能力，而且根据荷载水平、截面尺寸、混凝土强度和加固特性提供长达3小时的耐火时间。渥太华国家火灾实验室最近完成的物理试验和参数研究得出了预测素混凝土、钢筋混凝土和钢纤维混凝土填充的高强钢绞线轴心受压柱的承载能力和耐火时间的设计公式。介绍了该结构的设计方法，并通过工程实例说明了该方法的应用前景，对施工技术提出了切实可行的建议。
The benefits of steel hollow structural sections (HSS) from an aesthetic and structural point of view have long been recognized by architects and engineers in Canada, and more recently in the United States. However, when building codes require structural fire protection, the cost of providing such protection can be expensive for exposed members. Filling an HSS column with concrete not only improves the capacity of the member through composite action at ambient temperatures but also provides fire endurance periods of up to 3 hours depending on the load level, section size, concrete strength and reinforcing characteristics. Physical tests and parametric studies recently completed at the National Fire Laboratory in Ottawa have resulted in design equations which predict the load carrying capacity and fire endurance period of concentrically loaded HSS columns filled with plain concrete, barrein forced concrete and steel fiber-reinforced concrete. The design method is presented, case studies are used to illustrate potential applications, and practical suggestions are made regarding construction techniques.