Concrete failure of composite dowels under cyclic loading during full-scale tests of beams for the “Wierna Rzeka” bridge

Lorenc, W.

doi:10.1016/j.engstruct.2020.110199

Cited by 23 publications

(15 citation statements)

References 34 publications

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“…The first version of the clothoidal shape could not be produced on a massive scale because of technological problems with cutting (the necessity of two independent cutting lines); hence, the shape was developed further in Poland [4,59]. In autumn 2008, the solution was provided, wherein the self-crossing cutting line (resulting in steel overheating) could be substituted with a line that was not self-crossing (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…4c) to its final form introduced in bridge engineering (Fig. 4d) was connected to construction of "Wierna Rzeka" bridge in Poland [59,60]. Figure 31: General view of the CL shape tested in the PreCo-Beam project [7] with a height of 100 mm and spacing between dowels equal to 300 mm (specific nomenclature used for composite dowels is given).…”

Section: Searching For "The Best" Shapementioning

confidence: 99%

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The evolution of the shape of composite dowels

Lorenc

Seidl

Berthellemy³

2022

Studia Geotechnica Et Mechanica

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Composite dowels have opened new possibilities for engineers designing composite structures. The fundamental and most important characteristic of composite dowels is the shape of the cutting line. It is important to understand why only one particular shape of the cutting line is used in bridge engineering, while so many different shapes have been investigated by many researchers. The essential part of the process of developing composite dowels – the development of the shape of the cutting line – is presented in this paper. The influence of the steel web thickness is presented, and technological problems of steel fabrication are highlighted. The role of empirical experience from the first bridges, push-out tests, and finite element simulations is presented. Assumptions for numerical procedures are given. The distinction between the steel failure and concrete failure modes is introduced for composite dowels. The paper presents how the concept of “shape” was divided into “shape,” “ratio,” and finally “size,” and how, because of the fatigue problems in bridges, all the three factors have emerged to result in the form of shapes that can satisfy the requirements for bridges. Research leading to the invention of the first version of the clothoidal shape is presented.

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Section: Discussionmentioning

confidence: 99%

Section: Searching For "The Best" Shapementioning

confidence: 99%

The evolution of the shape of composite dowels

Lorenc

Seidl

Berthellemy³

2022

Studia Geotechnica Et Mechanica

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“…Numerical simulations were performed using finite element package ABAQUS, used by several authors to study the behavior of shear connectors [14], [17], [19], [20], [31], [32]. The description of the numerical model is presented in the subsequent sections.…”

Section: Numerical Analysesmentioning

confidence: 99%

“…Because of the complex geometry of shear connectors, the heterogeneous behavior of concrete, and the interaction between these two elements, the strength mechanism of composite dowels cannot be sufficiently described through experimental tests alone. Therefore, a significant part of this research was carried out through numerical models capable of simulating the nonlinearities of the materials and contact interactions to better understand the behavior of composite dowels [7], [17]- [20].…”

Section: Introductionmentioning

confidence: 99%

Assessing the bearing capacity of Crestbond shear connectors to concrete pry-out

Almeida

Veríssimo

Ribeiro

et al. 2023

Rev. IBRACON Estrut. Mater.

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In this work, a study on failure by concrete pry-out in Crestbond shear connectors is presented. The study’s aim was the development of an expression that estimates the connection’s bearing capacity. The analyses were carried out through numerical simulations designed to reproduce the referred failure mode. Numerical and experimental results are compared and discussed in relation to the maximum force reached and the cracking aspect typical of concrete pry-out. The proposed equation corresponded well to experimental results, with a mean ratio Ptheo/Pexp equal to 0,99 and a coefficient of variation of 10%. The results found in this study indicate that the concrete pry-out expression in German Technical Approval Z-26.4-56 can also be applied to Crestbond shear connectors.

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“…Lorenc focused on clothoid-shaped composite dowels of large-span composite beams in bridge system and presented experimental and numerical investigations on mechanical mechanism of this kind of dowel. It was found that the behavior of the clothoidal dowel strongly depended on the anchorage of its upper part in the concrete body [12,13]. Besides, Zhang et al studied the vibration performance of an innovative large-span U-shaped steel-concrete composite hollow waffle slab.…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior of Large‐Span Open‐Web Floors Consisting of I‐Shaped Steel Chords and Steel Tube Webs

Zhou

Yong

Chen

et al. 2020

Advances in Civil Engineering

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A composite large-span open-web floor (COF) system is introduced in this paper, which is composed of I-shaped steel chords, steel tube webs, and concrete slabs. One COF specimen was fabricated and tested under cyclic loadings. The failure process and hysteretic curve of the specimen were discussed in detail. Moreover, a finite element (FE) model was developed and verified by experimental results. A parametric study was performed to examine the effects of the concrete strength, steel strength, section steel thickness, and structural height. The parametric study demonstrates that the effects of the steel strength, section steel thickness, and structural height on the load-displacement hysteretic curve are proved to be significant. As for the bearing capacity and stiffness degradation of the COF system, the influence of the steel strength and section steel thickness is stronger than that of the concrete strength and structural height. Additionally, it is also found that the influence of the steel strength and section steel thickness on the energy dissipation is remarkable; the energy dissipation ability of the structure decreased with increasing the steel strength and increased with increasing the thickness of section steels.

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Concrete failure of composite dowels under cyclic loading during full-scale tests of beams for the “Wierna Rzeka” bridge

Cited by 23 publications

References 34 publications

The evolution of the shape of composite dowels

The evolution of the shape of composite dowels

Assessing the bearing capacity of Crestbond shear connectors to concrete pry-out

Seismic Behavior of Large‐Span Open‐Web Floors Consisting of I‐Shaped Steel Chords and Steel Tube Webs

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