In recent years the use of light gauge steel structures made of cold-formed steel has grown substantially around the world due to its unique advantages such as its cost effectiveness, durability, light weight and ease of use. Cold-formed steel sections have high section factor and high thermal conductivity, which result in a rapid increase in temperature during the fire, and under fire condition these sections experience a rapid reduction in strength and stiffness, thus investigating the behavior of these structures under fire has become particularly important. This paper presents the numerical study of behavior of cold-formed steel shear wall under fire condition. At first the finite element model of cold-formed steel shear wall was developed using Abaqus software and then the thermal and structural analysis were carried out taking into account the effects of geometric and material nonlinearities. To confirm the validity of numerical model, the results of the numerical model are compared with the previous test results. Further parametric studies have been carried out by considering some of the parameters affecting the behavior of cold-formed steel shear wall against fire such as the grade of steel and the thickness of cross section. The results of thermal analysis presented in the form of time–temperature profiles of hot flange, cold flange and web of stud, show that increasing the thickness of steel can lead to a decrease in the temperature of steel sections which is more evident in hot flange. Structural analysis of wall under fire condition have been studied under two conditions, namely steady and transient state conditions. In this analysis the effect of steel grade and thickness have been investigated separately. The results of structural analysis at room temperature are presented as axial force–displacement diagrams and failure modes, which show that increasing the thickness and grade of steel leads to an increase in ultimate compression capacity of stud. The results also show that increasing the stud thickness to a certain amount (1.55 mm) leads to an increase in fire resisting rating (FRR) and the use of high strength steel in load ratio range of 0.3–0.7 result in an increase in FRR.

近年来，由于其独特的优势，例如成本效益，耐用性，轻巧和易用性，冷弯型钢制成的轻型钢结构的使用已在世界范围内迅速增长。冷弯型钢具有较高的截面系数和较高的导热性，从而导致着火时温度迅速升高，并且在着火条件下，这些型材的强度和刚度会迅速降低，从而研究了这些结构在着火情况下的行为。变得尤为重要。本文介绍了冷弯型钢剪力墙在火灾条件下的数值研究。首先使用Abaqus软件开发了冷弯型钢剪力墙的有限元模型，然后考虑几何和材料非线性的影响进行了热分析和结构分析。为了确认数值模型的有效性，将数值模型的结果与先前的测试结果进行比较。通过考虑影响冷弯型钢剪力墙抗火性能的一些参数，例如钢种和截面厚度，进行了进一步的参数研究。热分析结果以热法兰，冷法兰和螺柱腹板的时间-温度曲线形式显示，表明增加钢的厚度可以导致钢截面温度降低，这在热法兰中更加明显。在稳态和瞬态两个条件下研究了火灾条件下墙体的结构分析。在此分析中，已分别研究了钢种和厚度的影响。室温下结构分析的结果以轴向力-位移图和破坏模式表示，这表明增加钢的厚度和等级会导致螺栓的最终抗压能力增加。结果还表明，将螺柱厚度增加到一定量（1.55毫米）会导致耐火等级（FRR）的增加，而在0.3-0.7的负载比范围内使用高强度钢会导致FRR的增加。在此分析中，已分别研究了钢种和厚度的影响。室温下结构分析的结果以轴向力-位移图和破坏模式表示，这表明增加钢的厚度和等级会导致螺栓的最终抗压能力增加。结果还表明，将螺柱厚度增加到一定量（1.55毫米）会导致耐火等级（FRR）的增加，而在0.3-0.7的负载比范围内使用高强度钢会导致FRR的增加。在此分析中，已分别研究了钢种和厚度的影响。室温下结构分析的结果以轴向力-位移图和破坏模式表示，这表明增加钢的厚度和等级会导致螺栓的最终抗压能力增加。结果还表明，将螺柱厚度增加到一定量（1.55毫米）会导致耐火等级（FRR）的增加，而在0.3-0.7的负载比范围内使用高强度钢会导致FRR的增加。这表明增加钢的厚度和等级会导致螺栓的最终抗压能力增加。结果还表明，将螺柱厚度增加到一定量（1.55毫米）会导致耐火等级（FRR）的增加，而在0.3-0.7的负载比范围内使用高强度钢会导致FRR的增加。这表明增加钢的厚度和等级会导致螺栓的最终抗压能力增加。结果还表明，将螺柱厚度增加到一定量（1.55毫米）会导致耐火等级（FRR）的增加，而在0.3-0.7的负载比范围内使用高强度钢会导致FRR的增加。