Waam reinforced variable thickness welded i-beam and method of manufacturing the same

By adding longitudinally variable thickness steel plates and WAAM stiffeners to the top of the flanges of I-beams, and combining this with the actual stress distribution design, the problem of low material utilization of I-beams of uniform thickness was solved, achieving efficient structural reinforcement and material saving, and improving load-bearing capacity and seismic resistance.

CN121539140BActive Publication Date: 2026-05-29TAIYUAN UNIVERSITY OF TECHNOLOGY
View PDF 3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TAIYUAN UNIVERSITY OF TECHNOLOGY
Filing Date
2026-01-19
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing steel structure projects, the internal force distribution of I-beams of uniform thickness is uneven at different locations, resulting in low material utilization and reduced structural stability and load-bearing capacity. This fails to fully utilize the material strength, and traditional reinforcement methods have not effectively improved load-bearing performance.

Method used

By employing WAAM technology, longitudinally variable thickness steel plates and WAAM stiffeners are added to the top flange of I-beams. The thickness variation is designed according to the actual stress distribution. Combined with webs of equal or longitudinally variable thickness, stiffeners are integrally formed at the top flange using linear arc additive manufacturing technology, forming three types of reinforcement structures to improve the stability and load-bearing capacity and local buckling performance of the components.

Benefits of technology

While saving steel, the overall stability and seismic performance of the I-beam were improved, the manufacturing process was simplified, the efficient use of materials and flexible reinforcement of the structure were achieved, and the structural self-weight and life-cycle cost were reduced.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN121539140B_ABST
    Figure CN121539140B_ABST
Patent Text Reader

Abstract

The present application relates to a WAAM reinforced variable-thickness welded I-beam and a manufacturing method thereof. The variable-thickness welded I-beam comprises flanges, a web welded with the flanges and a WAAM stiffener, wherein the flanges are longitudinal variable-thickness steel plates, the web is an equal-thickness steel plate or a longitudinal variable-thickness steel plate, and the WAAM stiffener is arranged at the top end of the flange and integrally formed at the top end of the flange by a wire-arc additive manufacturing technology. The longitudinal variable-thickness flange combined with the WAAM stiffener reinforcing structure not only has a simple processing technology and significantly reduces the amount of steel material, but also has good seismic performance. The manufacturing method uses the WAAM technology to manufacture the stiffener, can realize integrated forming of complex shapes, eliminates traditional welding, cutting and other processes, simplifies the manufacturing process, and reduces material waste.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Longitudinal variable section H-shaped steel

    CN109323120A

  • Method for producing component and correspondingly produced component

    CN118234581A

  • Buckling stiffening structure of i girder

    JP1996193383A