Fatigue behaviour of bridge deck slab elements strengthened with reinforced UHPFRC

Makita, Tohru; Brühwiler, Eugen

doi:10.1201/b12352-292

Cited by 11 publications

(8 citation statements)

References 3 publications

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“…Similar result, e.g. fatigue endurance limit at 50% of the ultimate strength, was obtained for RC members strengthened with R-UHPFRC (RU-RC member) [18].…”

Section: Results Of Tensile Fatigue Testssupporting

confidence: 81%

Tensile fatigue behaviour of Ultra-High Performance Fibre Reinforced Concrete combined with steel rebars (R-UHPFRC)

Makita

Brühwiler

2014

International Journal of Fatigue

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a b s t r a c tUltra-High Performance Fibre Reinforced Concrete (UHPFRC) combined with steel rebars, subsequently called R-UHPFRC, is a promising building material implying a novel technology for the improvement of concrete structures. Steel rebars enhance effectively the resistance of UHPFRC while reducing variability in the tensile behaviour of monolithic UHPFRC due to variation in fibre distribution and orientation. When a thin layer of R-UHPFRC is overlaid on top of a concrete bridge deck slab, it is subjected to repeating wheel loads and fatigue limit state needs to be considered. This paper presents the results of tensile fatigue tests on R-UHPFRC elements for the determination of its fatigue behaviour. Experimental results show a fatigue endurance limit at 10 million cycles at a solicitation level of S = 0.54 for S being the ratio between the maximum fatigue force and the ultimate strength. Over the fatigue life of the specimens, stress was transferred from UHPFRC to steel rebars. Fatigue resistance of R-UHPFRC shows that it has a significant potential for fatigue strengthening of reinforced concrete structural elements like bridge deck slabs.

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“…Similar result, e.g. fatigue endurance limit at 50% of the ultimate strength, was obtained for RC members strengthened with R-UHPFRC (RU-RC member) [18].…”

Section: Results Of Tensile Fatigue Testssupporting

confidence: 81%

Tensile fatigue behaviour of Ultra-High Performance Fibre Reinforced Concrete combined with steel rebars (R-UHPFRC)

Makita

Brühwiler

2014

International Journal of Fatigue

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“…Most of the studies on bridge structure focus on dynamic behavior [1][2][3][4], fatigue damage [4][5][6], and reliability analysis [7,8]. Using frequency and time domain methods in [1], dynamic characteristics of a laboratory bridge model are determined by operational modal analysis.…”

Section: Introductionmentioning

confidence: 99%

“…In [4], the dynamic properties of a decommissioned timber bridge are measured in the laboratory to observe the characteristics of the lowest few mode shapes as the support stiffness is varied to simulate deterioration of the pile supports, and an evaluation method is proposed to quantitatively assess the foundation competence of timber bridges. To avoid heavy interventions for strengthening of bridge deck slabs, in [5], an improved building material is used, fatigue tests for the determination of the fatigue behavior of beams reinforced by this building material are presented, and then a technique is developed to reduce the use costs as well as life cycle costs. The performance of an instrumented concrete bridge deck that has longitudinal cracks along with the entire length of the bridge is presented in [6], and the influence on their fatigue life is monitored.…”

Section: Introductionmentioning

confidence: 99%

Feedforward and Feedback Vibration Control and Algorithm Design for Cable-Bridge Structure Nonlinear Systems

Liang

Gao

et al. 2014

Abstract and Applied Analysis

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Technique of feedforward and feedback optimal vibration control and simulation for long-span cable-bridge coupled systems is developed. Buffeting loading systems of long-span cable-bridge structure are constructed by weighted amplitude wave superposition method. Nonlinear model of cable-bridge coupled vibration control system is established and the corresponding system of state space form is described. In order to reduce buffeting loading influence of the wind-induced vibration for the structure and improve the robust performance of the vibration control, based on semiactive vibration control devices and optimal control approach, a feedforward and feedback optimal vibration controller is designed, and an algorithm is presented for the vibration controller. Numerical simulation results are presented to illustrate the effectiveness of the proposed technique.

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“…At fatigue solicitation levels above this value, the fatigue life was rather short and fatigue strength was not significant. Fatigue fracture process of R-UHPFRC -RC beams was determined by fatigue fracture of steel rebars in the R-UHPFRC layer [19].…”

Section: Fatigue Behaviormentioning

confidence: 99%

“Structural UHPFRC”: Welcome to the post-concrete era !

Brühwiler

2016

First International Interactive Symposium on UHPC

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"Structural UHPFRC" stands for Ultra-High Performance Fiber Reinforced Cementbased composite material which is complemented by reinforcing and prestressing steel to enhance structural resistance and durability. First, properties of impermeable, tensile strain hardening UHPFRC are described in view of structural applications. Then, two fundamental concepts are presented and validated by means of research results and practical applications: i) Rehabilitation and strengthening of existing concrete structures by adding a layer of structural UHPFRC, and ii) Construction of new structures in Structural UHPFRC, often composed of precast elements. Many applications show that Structural UHPFRC has made its proof as a novel building material and technology to improve structures which may be seen as the advent of a new construction era: the post-concrete era has begun !

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Fatigue behaviour of bridge deck slab elements strengthened with reinforced UHPFRC

Cited by 11 publications

References 3 publications

Tensile fatigue behaviour of Ultra-High Performance Fibre Reinforced Concrete combined with steel rebars (R-UHPFRC)

Tensile fatigue behaviour of Ultra-High Performance Fibre Reinforced Concrete combined with steel rebars (R-UHPFRC)

Feedforward and Feedback Vibration Control and Algorithm Design for Cable-Bridge Structure Nonlinear Systems

“Structural UHPFRC”: Welcome to the post-concrete era !

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