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“Pocket-Monitoring” for the fatigue safety verification of bridge members in steel and reinforced concrete

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A monitoring system for determination of real deck slab behaviour in prestressed box girder bridges

Eugen Brühwiler, Mark Anthony Treacy

Due to ever increasing traffic demands the fatigue safety and service life of the bridges of a railway line in Brazil need to be examined. Conventional assessment methods using load models and approaches as suggested in codes lead to conservative results r ...

CRC Press/Balkema2012

Analyzing fluctuations in car-following

Many car-following models predict a stable car-following behavior with a very small fluctuation around an equilibrium value g∗ of the net headway g with zero speed-difference Δv between the following and the lead vehicle. However, it is well-known and addi ...

Elsevier2012

Updating existing railway bridges based on monitoring data

Eugen Brühwiler, Mark Anthony Treacy, Marina Rocha Pinto Portela Nunes

Due to the important direct and indirect costs of the intervention, more detailed examination methods based on data as obtained from monitoring is suggested. This paper reports on an ongoing study to examine the fatigue safety of one standard bridge type, ...

CRC Press/Balkema2012

Fatigue safety examination of a 150-year old riveted railway bridge

Eugen Brühwiler

Built in 1859, the railway bridge over the Rhine between Koblenz (Switzerland) and Waldshut (Germany) consists of a three span continuous riveted steel truss girder and an approach viaduct in natural stone masonry. Due to ever increasing traffic demands th ...

CRC Press/Balkema2012

Fatigue load estimation for road bridges using long term WIM monitoring

Eugen Brühwiler, Mark Anthony Treacy

As bridges form the keystone of transport networks, their safe operation with minimal maintenance closures is paramount for efficient operation. Yearly increases in the volume of heavy traffic mean a higher number of fatigue damaging load cycles. The study ...

Bérenguer, Christophe; Grall Antoine & Guedes Soares, Carlos2011

Transition Slabs of Integral Abutment Bridges

Aurelio Muttoni, Olivier Burdet, Damien Dreier

Over the past decades, an increasing number of bridges with integral abutment have been built in Switzerland. This type of bridge offers various advantages over standard bridges with abutments, equipped with expansion joints and bearings that require regul ...

Structural Engineering International2011

Post-punching behavior of reinforced concrete slabs

Yaser Mirzaei

Reinforced concrete flat slabs are extensively used in buildings and parking garages. Their design is governed by deflection at the serviceability limit state and punching shear at the ultimate limit state. When no punching shear reinforcement is provided, ...

EPFL2010

Experience in the Long-Term Monitoring of Bridges

Olivier Burdet

At the end of the 1980’s, a series of existing bridges in Switzerland were equipped with a network of hydrostatic leveling devices, with the aim of following their longterm behavior. Some of the bridges were known to exhibit a steady increase in their defo ...

3rd fib International Congress2010

A probabilistic assessment of the effect of post-weld treatment on the fatigue performance of tubular truss bridges

Alain Nussbaumer, Scott Walbridge

In the design of tubular truss bridges, engineers have found the fatigue performance of the joints to be a critical aspect. In looking for ways to improve this performance, the use of residual stress-based post-weld treatments has been suggested. Although ...

Elsevier2008

Reinforced concrete bridges under increased railway traffic loads

Andrin Herwig

The aim of this thesis is to provide rational engineering methods for the fatigue safety examination of existing railway bridges. Increasing railway traffic loading and enhanced structural analysis allow for higher exploitation of the capacity of bridge el ...

EPFL2008