Investigation on shear buckling of steel welded I‐section beams with reinforced web openings

Abstract

Plate girders with I‐section frequently require large web openings to accommodate ducts and pipes in buildings and bridges. It is known that the critical load equivalent to an unperforated plate can be achieved by an appropriate reinforcement of the web opening. The majority of the investigations on thin‐walled webs with web opening under shear loading has been focused on web slendernesses ranging between 200 to 360. Three tests on plate girders with a web slenderness of 416 are presented that contain web openings. The effect of an all‐around reinforcement (hollow section) of the web opening is studied in three‐point bending tests. The tests are calculated with finite elements accounting for imperfections that had been measured before testing. A parametric study is performed to evaluate different types of reinforcements for high web slendernesses.

Geometric Properties of Steel Components with Stability and Fatigue Risks Using 3D-Laser-Scanning

“…The possible reason can be attributed to the fact that the residual stress near the weld in the specimen was not considered in the numerical model. I-section girders with web openings, designed to accommodate pipes in buildings and bridges, usually suffer shear buckling failure due to the high slenderness of the web and the corresponding openings of thin-walled webs [27]. Thus, the effect of an all-around reinforcement with a hollow section of the web opening is investigated in threepoint bending tests.…”

“…The spatial resolution of the measured points is 1 mm in the axial direction and 1.25 mm in the circumferential direction. For the investigation of the shear buckling behaviour of steel girders with web openings [27], the initial geometric imperfections of the entire web were analysed based on the real geometric dimensions of the out-of-plane with 3D scanning. Due to the large dimensions in the length direction, the steel beam was scanned in segments in an upright position, as shown in Figure 8a.…”

“…In this paper, a self-developed 3D laser scan platform based on laser triangulation is used to capture specimen dimensions using point clouds. The specimens include steel beams with web openings to investigate buckling behaviour [27], cylindrical shell specimens with a diameter of up to 1.6 m [28], and weld seams of the cross-weld specimen. The procedures for post-processing of the point clouds and the general steps for transforming the point cloud information into an FE model are presented in detail.…”