Shear Force Resistance of Plate Girders with Trapezoidally Corrugated Webs and Reinforced Web Openings

Corrugated web beams are an alternative to steel girders with flat webs. They consist of a welded Isection with a thin-walled trapezoidally corrugated web and flanges made of wide flat steel. In comparison with hot-rolled or welded I-beams with flat webs, corrugated web beams offer significant material savings and are produced fully automated. Assuming the same load-bearing capacity, corrugated web beams are lighter than those with a flat web, since the corrugated web beams can often be loaded up to their plastic resistance without reinforcement of the web. Research on the loadbearing behaviour of corrugated web beams without web openings is well-established. However, the resistance of corrugated web beams with reinforced web openings, which are necessary for installations in buildings, has not been well investigated experimentally yet. This paper examines the shear force resistance of trapezoidally corrugated web beams with reinforced square web openings. Two beam-like specimens with the same geometry but differently reinforced web openings were tested. The experimental results are compared with a Finite Element Analysis using Abaqus® and with an analytical model that allows a simplified calculation. The comparison identifies how the wall thickness of the web opening reinforcement affects the shear force resistance of perforated corrugated web beams.波纹腹板钢梁（Corrugated web beams）是平腹板钢主梁的替代方案。其由带有薄壁梯形波纹腹板的焊接工字形截面构件，以及由宽平板钢制成的翼缘组成。相较于热轧或焊接平腹板工字钢，波纹腹板钢梁可显著节省材料，且可实现全自动化生产。在承载能力相同的前提下，波纹腹板钢梁比平腹板钢梁更轻便，这是因为波纹腹板通常可在无需腹板加固的情况下，达到其塑性抗力极限。针对无腹板开孔的波纹腹板钢梁的受力性能研究已较为成熟。然而，针对建筑安装所需的带加固腹板开孔的波纹腹板钢梁的抗力性能，目前仍缺乏充分的实验研究。本文针对带加固方形腹板开孔的梯形波纹腹板钢梁的抗剪承载力展开研究。试验选取了2组几何参数一致但开孔加固方式不同的梁式试件开展测试。将试验结果与采用Abaqus®软件的有限元分析结果，以及可用于简化计算的解析模型结果进行对比。通过对比分析，明确了腹板开孔加固件的壁厚对开孔波纹腹板钢梁抗剪承载力的影响规律。