Structural Health Monitoring of an Incrementally Launched Extradosed Stay Cable Bridge
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Bibliographic Details
| Author(s): |
Sachin Ravjee
(Zutari, Pretoria, South Africa; University of Pretoria, Pretoria, South Africa)
Johan Kotzé (Zutari, Pretoria, South Africa) Phillip Bettencourt (Zutari, Pretoria, South Africa) Sarah Skorpen (University of Pretoria, Pretoria, South Africa) Elsabe Kearsley (University of Pretoria, Pretoria, South Africa) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Congress: Beyond Structural Engineering in a Changing World, San José, Cost Rica, 25-27 Seotember 2024 | ||||
| Published in: | IABSE Congress San José 2024 | ||||
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| Page(s): | 1077-1085 | ||||
| Total no. of pages: | 9 | ||||
| DOI: | 10.2749/sanjose.2024.1077 | ||||
| Abstract: |
Senqu Bridge will be the largest of three bridges constructed to cross the Polihali Reservoir as part of Phase II of the Lesotho Highlands Water Project (LHWP). The bridge will be 825 m long, comprising of 2 x 37.5 m end spans, 13 x 50 m main spans and 1 x 100 m Extradosed Stay Cable span, with piers reaching heights of around 90 m in the mountainous Lesotho valley. The concrete box girders will be incrementally launched from both abutments, with the Extradosed Stay Cables stressed during the launch to compensate for the varying launching moments. The bridge will have a Structural Health Monitoring (SHM) system installed to verify and adjust the design parameters during the construction process. The measured data will help to optimise the prestressing in the deck and stay cables as well as for adjustment of bearings and expansion joints. This paper discusses the detailed layout of the instrumentation as well as the expected behavioural trends during construction. |
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| Keywords: |
structural health monitoring Incremental launching method Extradosed Stay Cables
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