Case Study of Mechanical Performance of Kilometer Level Cable-Stayed Bridges with Steel-Concrete Composite Deck

Tingting Ma; Shishou Zhang; Meitao Shang

doi:10.7250/bjrbe.2026-21.676

Case Study of Mechanical Performance of Kilometer Level Cable-Stayed Bridges with Steel-Concrete Composite Deck

Authors

Tingting Ma College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, China https://orcid.org/0000-0001-7803-7709
Shishou Zhang College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, China https://orcid.org/0009-0009-4786-3851
Meitao Shang CCCC Shanghai Harbor Engineering Design & Research Institute Co., Ltd., Shanghai, China https://orcid.org/0009-0000-9014-5964

DOI:

https://doi.org/10.7250/bjrbe.2026-21.676

Keywords:

cable-stayed bridge, composite open deck section, trial design, normal concrete, ultra-high performance concrete, static performance, spanning capacity

Abstract

In view of the shortcomings of large dead-weight and limited spanning capacity for traditional composite girders and the fatigue failure and pavement deteriorations for steel girders, composite girders with lightweight composite deck emerged as good alternatives. Thus, trial design schemes of long-span cable-stayed bridges with steel-NC (normal concrete) and steel-UHPC (ultra-high performance concrete) composite decks were proposed under different span conditions. The static performance and technical feasibility of the designed bridges and the influence of structural parameters of main girder on different static effects were analysed, based on which, the determinative static effects and their variation with span length were investigated. The results show that the designed NC-slab schemes with main spans no more than 900 m can meet the requirements of static strength, stiffness and stability, while the 1000 m NC-slab scheme cannot meet the compressive strength requirements of the concrete slab. The UHPC-slab schemes meet the static requirements even when the main span reaches 1100 m, and the most unfavourable static effect turns to be the maximum compressive stress of steel girders. The main structural parameters of the main girder that most affect the unfavourable static effects include the main girder height and the thickness of the lower flange steel plate. Using UHPC-slab instead of NC-slab improves the spanning capacity of cable-stayed bridges by approximately 25%, close to the reduction rate of the dead-weight of main girder.

Supporting Agencies

National Natural Science Foundation of China, Shanghai Frontiers Science Center of “Full Penetration” Far-Reaching Offshore Ocean Energy and Power

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