Research on the Improvement of Static Performance of Corroded Grid Structures Strengthened with External Prestressing

Weijing Zhang; Zhiyong Xu; Gongke Niu; Zheng Dong

doi:10.13206/j.gjgS25050501

Volume 41 Issue 4

Apr. 2026

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Weijing Zhang, Zhiyong Xu, Gongke Niu, Zheng Dong. Research on the Improvement of Static Performance of Corroded Grid Structures Strengthened with External Prestressing[J]. STEEL CONSTRUCTION(Chinese & English), 2026, 41(4): 10-18. doi: 10.13206/j.gjgS25050501

Citation:

Weijing Zhang, Zhiyong Xu, Gongke Niu, Zheng Dong. Research on the Improvement of Static Performance of Corroded Grid Structures Strengthened with External Prestressing[J]. STEEL CONSTRUCTION(Chinese & English), 2026, 41(4): 10-18. doi: 10.13206/j.gjgS25050501

Citation:

Weijing Zhang, Zhiyong Xu, Gongke Niu, Zheng Dong. Research on the Improvement of Static Performance of Corroded Grid Structures Strengthened with External Prestressing[J]. STEEL CONSTRUCTION(Chinese & English), 2026, 41(4): 10-18. doi: 10.13206/j.gjgS25050501

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Research on the Improvement of Static Performance of Corroded Grid Structures Strengthened with External Prestressing

doi: 10.13206/j.gjgS25050501

1. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China;
2. China Academy of Building Research, Beijing 100013, China

Received Date: 2025-05-05
Available Online: 2026-06-08

Abstract

Abstract

The spatial grid structure is one of the earliest and most widely applied forms of long-span spatial structures. However， as the service life extends， steel members are prone to corrosion-induced damage， leading to cross-sectional loss. This degradation results in decreased structural bearing capacity and stiffness， thereby creating potential safety hazards. Therefore， proposing effective strengthening measures for such structures is of significant importance. In this study， the corroded grid structure of a 57.6 m×28.8 m swimming pool was selected as the research object. Using ABAQUS finite element software， the influence of corrosion on the static performance of the structure was analyzed. A reinforcement scheme involving externally prestressed crossed cable-supported units， which are composed of steel cables， connectors， and struts， was proposed， and its effect on improving the performance of the corroded grid structure was evaluated. The results indicated that corrosion increased the maximum vertical displacement of grid structure joints from 62 mm to 70 mm， representing a relatively small increase. Corrosion showed a limited impact on the overall stiffness of the grid structure. Whether corrosion was considered or not， the maximum deformation of the structure complied with the code requirements. However， due to corrosion and changes in design loads， 14.1% of the members exceeded the stress limits. The adoption of the externally prestressed reinforcement scheme with crossed cable-supported units improved the static performance of the corroded grid structure. The structural stiffness was enhanced to some extent， and the proportion of overstressed members was reduced to 4.5% of the total.
- corrosion,
- grid structure,
- static performance,
- crossed cable-supported units,
- performance improvement

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References(23)

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