EXPERIMENTAL STUDY OF BEAM WITH EMBOSSED WEB

In order to reduce the weight and the material cost in the steel structures, a study on the slender sectional design has been continuously carried out. Steel beams with corrugated web have been widely used in the steel structures. The welding part between the corrugated web and the flange, however, is not straight, which makes the production costs increased. In order to compensate for this drawback, steel beam with an intaglio and embossed web (IEB) was invented by Innovation & Smart Heavy Industry Co., Ltd., South Korea. Plain plate is pressed to keep the upper and lower boundary of the web straight. This makes it possible to weld the flange and the embossed web by the automatic welding machine. In this study, four types of specimens were tested for comparison with plain H-shaped steel beam. Experimental results showed that the maximum load of the IEB specimens is about 1.3 times larger than that of the H-shaped steel beams. This is because the tension field action of embossed web significantly increased the post-buckling strength.为降低钢结构的自重与材料成本，细长截面设计的相关研究持续推进。波纹腹板（corrugated web）钢梁已在钢结构中得到广泛应用，但波纹腹板与翼缘（flange）的焊接部位并非直线型，这导致生产成本上升。为弥补这一缺陷，韩国创新与智能重工有限公司（Innovation & Smart Heavy Industry Co., Ltd.）研发出凹凸花纹腹板钢梁（intaglio and embossed web，简称IEB）。该钢梁通过压制平板使腹板上下边缘保持平直，从而可通过自动焊接设备完成翼缘与花纹腹板的焊接作业。本研究制备了四类试件，与普通H型钢梁开展对比试验。试验结果显示，IEB试件的最大荷载约为H型钢梁的1.3倍，这是由于花纹腹板的张力场效应（tension field action）显著提升了屈曲后强度（post-buckling strength）。