Eugen Brühwiler

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Publications associées (297)

Combined Passive and Active Ultrasonic Stress Wave Monitoring of Concrete Structures: An Overview of Data Analysis Techniques and Their Applications and Limitations

Eugen Brühwiler, Numa Joy Bertola

Combined passive ultrasonic (US) stress wave [better known as acoustic emission (AE)] and active US stress wave monitoring has been shown to provide a more holistic picture of ongoing fracture processes, damage progression, as well as slowly occurring agin ...

NDT.net2024

Early detection of structural damage in UHPFRC structures through the combination of acoustic emission and ultrasonic stress wave monitoring

Eugen Brühwiler, Numa Joy Bertola, Thomas Schumacher

Ultra-High-Performance Fiber-Reinforced Cementitious Composite (UHPFRC) offers several advantages compared to concrete, notably due to the strain hardening behavior under tensile actions. Structures made of this composite material are lightweight and highl ...

2024

Experimental and Analytical Investigation of Deflection of R-UHPFRC Beams Subjected to Loading-Unloading

Eugen Brühwiler, Bartlomiej Wojciech Sawicki

Under service conditions, R-UHPFRC (Reinforced Ultra High Performance Fiber Reinforced Cementitious composite) beams exhibit residual deflection after loading-unloading. This is due to the tensile strain hardening behavior of UHPFRC. The precise calculatio ...

Springer2024

Computational engine for finite element digital twins of structural dynamics via motion data

Eugen Brühwiler

Typical structural health monitoring systems employ limited numbers of sensors capable of measuring discrete local behaviours. However, practical challenges arise as these sensor arrays cannot cover all local areas of interest. To address this challenge, t ...

2024

Sustainable salvation of deficient RC bridges by means of the UHPFRC Technology

Eugen Brühwiler

Structural application of impermeable, tensile strain hardening UHPFRC (Ultra-High-Performance Fibre-Reinforced-Cementitious Composite) follows two fundamental concepts: 1) Rehabilitation and strengthening of existing bridges by adding a layer of UHPFRC, a ...

International Association for Bridge and Structural Engineering (IABSE)2024

Influence of fiber orientation on the high cycle tensile fatigue resistance of Ultra-High Performance Fiber Reinforced Cementitious

Eugen Brühwiler, Alain Nussbaumer, Jian Zhan

This paper quantitatively studies the influence of fiber orientation on the high cycle tensile fatigue resistance of ultra-high performance fiber reinforced cementitious composites (UHPFRC) within and beyond elastic domain. Eight tensile fatigue tests and ...

2024

UHPFRC technology for the extension of the service duration of bridges

Eugen Brühwiler

UHPFRC (Ultra High Performance Fiber Reinforced Cementitious Composite), complemented by reinforcement steel bars, is used for the rehabilitation and strengthening of existing bridges by adding a layer of UHPFRC, often on top of the bridge deck slab in rei ...

CRC Press/Balkema2024

Determining structural properties of a prestressed concrete bridge through the combination of static and dynamic load testing

Eugen Brühwiler, Numa Joy Bertola, Yves Sylvain Gilles Reuland

Examining structural safety requires hypotheses on several properties of the bridge structure, such as material properties, boundary conditions, and self-weight. The traditional approach relies on conservative assumptions for each structural property, foll ...

2024

Combining monitoring information and UHPFRC strengthening to extend bridge service duration

Eugen Brühwiler, Numa Joy Bertola

As many bridges are approaching the end of their supposedly theoretical service duration, finding novel technical solutions to extend their service duration is crucial, also for reasons of sustainability. In this article, two strategies (structural perform ...

CRC Press2024