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Numerical investigation and field monitoring of karun bridge abutment

Bayat, A ; Sharif University of Technology | 2005

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  1. Type of Document: Article
  2. Publisher: 2005
  3. Abstract:
  4. Karun Bridge is part of a national highway project underway in southern Iran. The bridge is a 336 m steel arch structure that weighs more than 2500 tons and crosses the Karun River 270 meters above the river valley. The bridge will be the largest suspended bridge in the Middle East. Cantilever construction is to be used to construct the bridge from both sides simultaneously. The weight of the bridge is to be carried by two abutments and four piers that are anchored to exposed weathered rock mass. Loads on the abutments and piers include significant cantilever loads and moments during bridge erection and wind loads. Daily rapid temperature changes also will impart significant thermal loads on the bridge and its supporting elements. To better understand anticipated displacement within the rock mass, and the behavior of the anchorage system a Discrete Element Method (DEM) analysis was performed. Due to the sensitivity and magnitude of the project, a field-monitoring program was implemented to measure the performance of the rock mass during and after the construction and to validate the DEM analysis. The field-monitoring program consisted of placing extensometers and load cells strategically on the structure and in bedrock and taking readings at regular intervals. The numerical model reasonably simulated the actual behavior of the rock mass abutment and the anchorage system. The study showed that DEM could closely simulate rock mass stability with discontinuities; DEM gives 4mm maximum displacement for the concrete block on the upper abutments compared to 2.7mm measured
  5. Keywords:
  6. Computer simulation ; Concrete blocks ; Finite difference method ; Highway systems ; Mathematical models ; Piers ; Structural analysis ; Anchorage systems ; Field-monitoring program ; Rock mass abutment ; Rock mass stability ; Abutments (bridge)
  7. Source: 33rd CSCE Annual Conference 2005, Toronto, ON, 2 June 2005 through 4 June 2005 ; Volume 2005 , 2005 , Pages GC-253-1-GC-253-8 ; 1894662091 (ISBN); 9781894662093 (ISBN)
  8. URL: https://www.researchgate.net/publication/340721318_Numerical_Investigation_and_Field_Monitoring_of_Karun_Bridge_Abutment