Behaviour Of Axially Restrained Steel Columns With Elliptical Sections Subjected To Severe Fire

椭圆形结构钢空心截面代表了结构工程师可用的钢截面范围的最新增加。然而，尽管在建筑吸引力和结构效率的基础上对它们的使用产生了广泛的兴趣，但完全缺乏耐火设计指导限制了应用。该项目旨在通过调查椭圆形钢截面在严重火灾下的性能来克服这一问题，并制定初步的简化防火设计指南和规则。该研究基于可靠的高标准火灾实验，理论理解和复杂的有限元数值模拟。防火测试将是获得所需基本数据的关键手段，一旦校准，将使用数字模型进行参数研究，以调查各个参数的重要性，并扩大现有数据的范围。这项研究将涉及调查钢空心和混凝土填充的椭圆形钢截面受到严重的火灾情况。设计规则的制定将考虑到消防工程师，并仔细考虑在结果的准确性和计算方法的简便性之间找到适当的平衡。将通过互联网网站、期刊出版物和在国际会议上的演讲来传播这项研究的结果。这项新的研究将是第一次调查研究的约束椭圆形空心钢管混凝土柱的耐火性能。

Elliptical structural steel hollow sections represent a recent addition to the range of steel sections available to structural engineers. However, despite the extensive interest in their use on the basis of both architectural attraction and structural efficiency, a complete absence of fire resistance design guidance is restraining applications. The proposed project aims to overcome this through investigating the performance of elliptical steel sections subjected to severe fire and to develop preliminary simplified fire design guidance and rules. The study is based on reliable high standards fire experiments, theoretical understanding, and sophisticated finite element numerical modelling. Fire testing will be the key instrument for obtaining the fundamental data required, and once calibrated, numerical modelling will be used to conduct a parametric study to investigate the importance of the individual parameters and to extend the range of available data. The study will involve investigating steel hollow and concrete filled elliptical steel sections subjected to severe fire scenarios. Design rules will be developed taking into account the fire engineer, with careful consideration given to finding the right balance between accuracy of result and ease of calculation methods. Dissemination of the findings of this research will be made through an internet website, journal publications and by presentation at international conferences. This novel study will be the first investigation to study the fire resistance of restrained elliptical hollow and concrete filled steel columns.