ANCHORAGE OF ADDITIONAL EXTERNAL PRESTRESSING TENDONS
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Published:2005
Wilhelm Buschmeyer, Michael Zech, 2005. "ANCHORAGE OF ADDITIONAL EXTERNAL PRESTRESSING TENDONS", Repair and Renovation of Concrete Structures: Proceedings of the International Conference held at the University of Dundee, Scotland, UK on 5–6 My 2005, Ravindra K. Dhir, M. Roderick Jones, Li Zheng
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An important problem in the application of external prestressing to strengthen older concrete bridge superstructures is to introduce high concentrated prestressing forces safely into the existing superstructure. The additional longitudinal prestressing tendons are often anchored in a block made of reinforced concrete, which is fixed to the superstructure by means of transversal prestressing. The required transversal prestressing force depends mainly on the friction in the contact surface. Resulting from numerous laboratory tests, a design concept to determine the magnitude of the required transversal prestressing force was developed at Institute of Structural Concrete Essen. This concept satisfies economic requirements as well as protection of the existing substance of the superstructure. The paper presents the concept and details of construction as well as the experiments and execution examples.
INTRODUCTION
ANCHORAGE TECHNIQUES
EXPERIMENTS
CONCLUSIONS
REFERENCES
