Cold bending is an efficient method recommended by steel fabricators for curving structural steel beams. It relies solely on mechanical forces to curve the beam into the required shapes without heating. While extensive research has been conducted on fabrication processes, data on the structural performance of cold bent steel girders in service is scarce which limits its use specifically in bridge structure applications. This paper investigates the effects of cold bending on the service load capacity of steel rolled shapes. An experimental and analytical program was developed for this purpose. The experimental program consists of cold curving a rolled IPE section about its weak axis and then bending it about its strong axis by applying vertical static loads that simulate service loads. Numerically, finite element analysis was conducted and validated based on experimental results. A parametric study was then conducted to identify structural parameters that can adversely affect the resistance capacity of cold bent steel rolled beams. Results show that the reduction in resistance capacity of the cold curved steel beam depends on the configuration of the applied loads and that its structural behavior can be improved by adding stiffeners, bearing plates, modifying the end boundary conditions and introducing load eccentricities. Recommendations are finally made to improve the efficiency of cold curved steel beams in service.

冷弯是钢结构制造商推荐的弯曲结构钢梁的有效方法。它完全依靠机械力将光束弯曲成所需的形状而无需加热。尽管已经对制造工艺进行了广泛的研究，但有关在役冷弯钢梁结构性能的数据却很少，这限制了其在桥梁结构应用中的特殊用途。本文研究了冷弯对轧制型材服务载荷能力的影响。为此目的，开发了一个实验和分析程序。该实验程序包括：将轧制的IPE截面绕其弱轴冷弯，然后通过施加模拟服务负荷的垂直静态负荷使其绕其强轴弯曲。在数值上 进行了有限元分析，并根据实验结果进行了验证。然后进行了参数研究，以确定可能对冷弯钢轧梁的承载能力产生不利影响的结构参数。结果表明，冷弯钢梁抗力的降低取决于所施加载荷的配置，并且可以通过添加加强筋，支承板，修改端边界条件和引入载荷偏心来改善其结构性能。最后提出建议，以提高使用中的冷弯钢梁的效率。结果表明，冷弯钢梁抗力的降低取决于所施加载荷的配置，并且可以通过添加加强筋，支承板，修改端边界条件和引入载荷偏心来改善其结构性能。最后提出建议，以提高使用中的冷弯钢梁的效率。结果表明，冷弯钢梁抗力的降低取决于所施加载荷的配置，并且可以通过添加加强筋，支承板，修改端边界条件和引入载荷偏心来改善其结构性能。最后提出建议，以提高使用中的冷弯钢梁的效率。