Repair and Strengthening of Cantilever Continuous Bridges using External Prestressed Cables: The Case Study of the Tan De Bridge in Vietnam
Received: 13 November 2024 | Revised: 10 December 2024 | Accepted: 14 December 2024 | 25 December 2024
Corresponding author: Dac Duc Nguyen
Abstract
Continuous cantilever bridges utilizing cross-sectional box girders have been widely used worldwide, as well as in Vietnam, with outstanding advantages, such as the ability to cover large spans, good torsional resistance, high stability, and low maintenance costs. The arrangement of the prestressed cables in the span can use all internal cables (cables arranged in a box cross-section) or a combination of internal wires and external cables (cables arranged in a box cavity). The arrangement of the external cables helps reduce the cross-sectional area and self-weight of the span, leading to savings in foundation costs and an increase in the ability to exceed the span. However, the external cables degrade and become damaged. Therefore, repair and strengthening solutions are required to ensure the longevity of the project. This study focused on researching solutions to restore and enhance span structures using external prestressed cables through specific projects implemented in Vietnam.
Keywords:
cantilever bridges, box girders, external cables, repair, strengtheningDownloads
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