More Realistic Codes for Existing Bridges

Nilimaa, Jonny; Bagge, Niklas; Häggström, Jens; Blanksvärd, Thomas; Sas, Gabriel; Täljsten, Björn; Elfgren, Lennart

doi:10.2749/stockholm.2016.0376

Cited by 3 publications

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Long-term strain measurements of traffic and temperature effects on an RC bridge deck slab strengthened with an R-UHPFRC layer

Sawicki

Brühwiler

2020

J Civil Struct Health Monit

View full text Add to dashboard Cite

This paper presents the results of 28-month-long monitoring of a slab portion of the Chillon viaducts in Switzerland using strain gauges and thermocouples. This post-tensioned reinforced concrete structure was strengthened with a layer of reinforced ultrahigh-performance fibre-reinforced cementitious composite (UHPFRC). The strain gauges are used to measure stresses in the bottom layer of reinforcement bars in the slab, while thermocouples explain the behaviour of the structure due to temperature variation. The response under both traffic and thermal actions is discussed. It is demonstrated that the stress variation due to the thermal action can be as large as the response due to traffic action even in such a massive structure. Furthermore, recommendations for analysing both traffic and thermal-induced stresses are given. The commonly used simplified method for calculation of fatigue stress is shown to be highly conservative, leading to overestimation of structural action effects by a factor of four.

show abstract

Long-term strain measurements of traffic and temperature effects on an RC bridge deck slab strengthened with an R-UHPFRC layer

Sawicki

Brühwiler

2020

J Civil Struct Health Monit

View full text Add to dashboard Cite

show abstract

Quantification of influence of monitoring duration on measured traffic action effects on fatigue of RC deck slabs of road bridges

Sawicki

Brühwiler

2022

Structure and Infrastructure Engineering

View full text Add to dashboard Cite

Testing Bridges to Failure - Experiences

Häggström

Bagge

Nilimaa

et al. 2017

IABSE Symposium, Vancouver 2017: Engineering the Future

Self Cite

View full text Add to dashboard Cite

Four bridges of different types have been tested to failure and the results have been compared to the load-carrying capacity calculated using standard code models and advanced numerical methods. The results may help to make accurate assessments of similar existing bridges. Here it is necessary to know the real behaviour, weak points, and to be able to model the load-carrying capacity in a correct way. The four bridges were: (1) a one span steel truss railway bridge; (2) a two span strengthened concrete trough railway bridge; (3) a one span concrete trough bridge tested in fatigue; and (4) a five span prestressed concrete road bridge. The unique results in the paper are the experiences of the real failure types, the robustness/weakness of the bridges, and the accuracy of different codes and models.

show abstract

More Realistic Codes for Existing Bridges

Cited by 3 publications

References 10 publications

Long-term strain measurements of traffic and temperature effects on an RC bridge deck slab strengthened with an R-UHPFRC layer

Long-term strain measurements of traffic and temperature effects on an RC bridge deck slab strengthened with an R-UHPFRC layer

Quantification of influence of monitoring duration on measured traffic action effects on fatigue of RC deck slabs of road bridges

Testing Bridges to Failure - Experiences

Contact Info

Product

Resources

About