Dynamic Characteristics of a Longitudinally Asymmetrical Multi-Span Suspension Bridge: The Chacao Bridge
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Bibliographic Details
| Author(s): |
Diego Pizarro
(Pontificia Universidad Católica de Chile and National Research Center of Integrated Natural Disaster Management CONICYT/FONDAP/1510017, Santiago, Chile)
Matías A. Hube (Pontificia Universidad Católica de Chile and National Research Center of Integrated Natural Disaster Management CONICYT/FONDAP/1510017, Santiago, Chile) Matias Valenzuela (Public Works Ministry, Santiago, Chile) Marcelo Márquez (Public Works Ministry, Santiago, Chile) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Conference: Structural Engineering: Providing Solutions to Global Challenges, Geneva, Switzerland, September 2015 | ||||
| Published in: | IABSE Conference Geneva 2015 | ||||
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| Page(s): | 2101-2108 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2015 | ||||
| DOI: | 10.2749/222137815818203971 | ||||
| Abstract: |
The objective of this research is to study the dynamic characteristics of longitudinally asymmetrical multi-span bridges by using the current design of the Chacao Bridge, a longitudinally asymmetrical multi-span suspension bridge that will be constructed in Chile. With a total length of 2,75 km and a maximum span of 1.155 m it will be the suspension structure with the longest span in Latin America. To obtain the mode shapes and frequencies, a three-dimensional finite element model is developed using the software ANSYS. Results showed that the first transverse frequency is 0,0635 Hz and the first vertical frequency is 0,1130 Hz. The obtained dynamic characteristics are compared with those of a symmetrical multi-span suspension bridge with similar characteristics. Finally, a parametric study to analyse the influence of the central pylon in the dynamic characteristics of a longitudinally asymmetrical multi-span suspension bridge is conducted. |
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| Keywords: |
bridges finite element method (FEM) suspension ropes cables long span multi-span Dynamic characteristics Chacao Bridge
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