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Topologie des champs de contraintes pour le dimensionnement des structures en béton armé

Publications associées (58)

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Multiaxial fatigue criteria for prestressed strengthening of steel connections

Alain Nussbaumer, Masoud Motavalli, Elyas Ghafoori, Hossein Heydarinouri

In this study, the high-cycle fatigue behavior of bridge connections subjected to distortion-induced loadings (generating multiaxial stresses) and strengthened with prestressed elements were experimentally investigated. Thereafter, appropriate critical pla ...

ELSEVIER SCI LTD2021

Coupled hydro-mechanical analysis of compacted bentonite behaviour during hydration

Lyesse Laloui, Alessio Ferrari, Jose Antonio Bosch Llufriu

This study analyses the response of compacted bentonites upon hydration based on a coupled hydro-mechanical elasto-plastic framework. As an alternative to multi-porosity interpretation, the framework was selected based on the experimental evidence of adsor ...

2021

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Simplified assumptions have traditionally been made on the rebar–to–concrete interaction in structural concrete to calculate the stress state in rebars. Such assumptions typically consider a uniform stress state in the reinforcement at a given cross sectio ...

2020

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The compressive resistance of concrete in new structures is usually characterized on the basis of tests performed on concrete cylinders or cubes under relatively rapid loading conditions. Although efficient for material characterization, these tests do not ...

ERNST & SOHN2020

Cold stiffening of orthotropic steel decks by a composite UHPFRC layer

Eugen Brühwiler, Lan Duan, Shichao Wang

Cold stiffening of the plate of Orthotropic Steel Deck (OSD) of bridges can be achieved by adding a layer of Ultra-High Performance Fiber Reinforced Cementitious Composite material (UHPFRC) on top of the deck plate by composite design, thus expecting to re ...

ELSEVIER SCI LTD2020

Prediction of autogenous shrinkage of cement pastes as poro-visco-elastic deformation

Karen Scrivener, Zhangli Hu, Pietro Lura

Precise and robust predictions of autogenous shrinkage of high performance concrete are essential to limit self-induced stresses and cracking in modern concrete structures. This paper presents predictions of autogenous shrinkage for three cement pastes of ...

PERGAMON-ELSEVIER SCIENCE LTD2019

Development of prestressed unbonded and bonded CFRP strengthening solutions for tensile metallic members

Alain Nussbaumer, Ardalan Hosseini, Masoud Motavalli, Elyas Ghafoori

In this study, a novel unbonded mechanical clamping system was developed for the strengthening of tensile metallic members using prestressed carbon fiber reinforced polymer (CFRP) plates. The system clamps a pair of prestressed CFRP reinforcement to a meta ...

2019

Current infrastructure is designed and built such that it must simultaneously comply with all possible loads. This leads to overdesigned structures that are inefficient in terms energy and cost. A structure that can self-identify damage, adapt, and learn f ...

2019

Design of concrete structures using structural optimization based on the stress field method

Aurelio Muttoni, Qianhui Yu, Miguel Fernández Ruiz

The Elastic Plastic Stress Field method (EPSF) is a widely used tool for design and verification of structural concrete works. EPSF uses the elastic-plastic material behavior, which allows accounting for compatibility conditions and thus provides exact sol ...

2018

Seismic assessment of unreinforced masonry structures remains a challenge. This dissertation investigates the in-plane behavior of historical masonry elements and proposes an advanced simulation method based on the cohesive zone model (CZM) in a finite ele ...

EPFL2018