Abstract

Post-tensioning is suitable, reliable and durable method of strengthening existing engineering structures, especially bridges. The high efficiency of post-tensioning can be seen in many applications throughout the world. In this paper the method is extended by a structural system of substituted cable ducts, which allows for significantly widening application of prestressing so it’s convenient mostly for application on beam bridges or slab bridges (built in years 1920 – 1960). The method of substituted cable ducts is based on theoretical knowledge and technical procedures, which were made possible through the development in prestressing systems, particularly the development of prestressing tendons (monostrands) and encased anchorages, as well as progress in drilling technology. This technique is highly recommended due to minimization of interventions into the constructions, unseen method of cable arrangement and hence the absence of impact on appearance, which is appreciated not only in case of valuable historical structures but also in general. It is possible to summarise that posttensioning by monostrands in substituted cable ducts is a highly effective method of strengthening existing bridges in order to increase their load capacities in terms of current traffic load and to extend their service life.

Highlights

  • When strengthening by post-tensioning, the prestressing tendons must be placed inside a cross section of a bridge structure

  • In this paper the method is extended by a structural system of substituted cable ducts, which allows for significantly widening application of prestressing so it’s convenient mostly for application on beam bridges or slab bridges

  • The method of substituted cable ducts is based on theoretical knowledge and technical procedures, which were made possible through the development in prestressing systems, the development of prestressing tendons and encased anchorages, as well as progress in drilling technology

Read more

Summary

Related content

Strengthening of bridges by post-tensioning using monostrands in substituted cable ducts. To cite this article: Ladislav Klusáek and Adam Svoboda 2017 IOP Conf. View the article online for updates and enhancements. - The effect of post-tensioning force magnitude and eccentricity on the natural bending frequency of cracked posttensioned concrete beams D Noble, M Nogal, A J O'Connor et al. - Design and analysis of the tunnel connecting the beamcorridor and the spectrum hall of the CSNS Liu Jian, Wang Qing-Bin, Wu Qing-Biao et al. - HTS prototype for power transmission cables: recent results andfuture programmes M Nassi

IOP Publishing
Introduction
Published under licence by IOP Publishing Ltd
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call