Effect of heating rate on bond failure of rebars into concrete using polymer adhesives to simulate exposure to fire

Pinoteau, Nicolas; Pimienta, Pierre; Guillet, Thierry; Rivillon, Philippe; Rémond, Sébastien

doi:10.1016/j.ijadhadh.2011.08.005

Cited by 24 publications

(35 citation statements)

References 14 publications

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“…In order to understand the spacing effect, three kinds of spacing 5d, 8d, 12d, are adopted in three models respectively and to avoid the failure of concrete breakout enough edge distance is chosen as constant of 12d in three cases. Edge distance is another key factor for anchor and the anchorage strength would decrease with concrete breakout failure instead of anchor steel failure if the edge distance is less than critical value [14], so three kinds of spacing 5d, 7d, 10d, are also considered in three models respectively and to avoid the failure of concrete cone overlap, enough spacing is chosen as constant of 16d in three cases.…”

Section: A Analysis Resultsmentioning

confidence: 99%

Parametric Analysis of Seismic Behavior for Steel-to-Concrete Connection Subjected to Combined Moment and Shear Loading

Xu¹,

Xie²,

Sun³

2017

IJET

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Abstract-Post-installed anchorage is a widely used connection technology where the structural steel is connected with the concrete element by adhesive anchor especially in the field of strengthening and retrofitting engineering. ABAQUS software has been employed in this paper to analyze the seismic behavior of steel-to-concrete connections with consideration of different spacing and edge distance of anchor. The results show that there is strength reduction for steel-toconcrete connection under cyclic loading compared with static loading capacity. In parameter analysis of spacing, anchors with spacing 12d behave good performance in capacity and seismic energy dissipation. As for the study of edge distance, compared with static results the ultimate capacity of anchor in small edge distance has significant reduction because of incomplete concrete cone, connection with edge distance 10d under cyclic loading presents similar anchorage behavior with strength in static test. And the minimum value 8d of edge distance is proposed for practical design.Index Terms-Adhesive anchor, steel-to-concrete connection, seismic behavior, spacing, edge distance.

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Section: A Analysis Resultsmentioning

confidence: 99%

Parametric Analysis of Seismic Behavior for Steel-to-Concrete Connection Subjected to Combined Moment and Shear Loading

Xu¹,

Xie²,

Sun³

2017

IJET

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“…Then, the compressive stress in the concrete section could be calculated according to Eq. (5), by considering the strain compatibility between the concrete and the steel rebars. The resulting compressive force is then obtained by integrating the compressive stress over the entire thickness of the compressed zone, according to Eq.…”

Section: Design Methods Application 321 Quantification Of the Appliementioning

confidence: 99%

“…(1) The third step in the calculation of the evolution of the PIR bearing capacity is to assign a bond resistance value to each element of the PIR depending on its temperature. This step relies on the bond strength-temperature relationship obtained by pull-out tests at high temperature [5] [23] performed on chemical PIRs made from the same resin.…”

Section: -Temperature Mapping (θ(Xt))mentioning

confidence: 99%

“…Post-installed rebars (PIRs) offer advantageous solutions for concrete construction by proposing a viable and economical method for adding new concrete sections or attaching steel members to existing structures [3] [4]. Indeed, PIRs were initially used for correcting fabrication errors in precast concrete, and then in retrofitting, extending and repairing existing structures [5] [6]. Today, PIRs are also used in new constructions to meet the high architectural requirements by providing more flexibility in the planning and design of concrete structures [7].…”

Section: Introductionmentioning

confidence: 99%

“…However, when temperature exceeds the resin glass transition temperature, a change in viscosity and physical state occur [24], leading therefore to a new bond stress distribution along the bond joint [25] [26]. The influence of the heating increase rate was studies in [5], and it is shown that high heating rates can generate a thermal gradient along the steel rebar and consequently can lead to a new bond stress distribution. To conclude, the mechanical behavior of chemical PIRs at high temperature seems to be very complex due to several mechanical and physicochemical changes happening at the adhesive joint, affecting its mechanical properties [23] [27].…”

Section: Introductionmentioning

confidence: 99%

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Fire design of post-installed bonded rebars: Full-scale validation test on a 2.94 × 2 × 0.15 m3 concrete slab subjected to ISO 834-1 fire

Lahouar

Pinoteau

Caron

et al. 2018

Engineering Structures

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Fire design of post-installed bonded rebars: Full-scale validation test on a 2.94 x 2 x 0.15 m 3 concrete slab subjected to ISO 834-1 fire. Engineering Structures, Elsevier, 2018, 174, pp. AbstractThanks to the improvement in mechanical and adhesion properties of polymer resins, Post-Installed Rebars (PIRs) succeeded progressively in replacing cast-in place rebars in some applications by offering equivalent or even higher mechanical properties at ambient temperature. However, the mechanical behavior of PIRs is essentially governed by the mechanical behavior of polymer resins, which is highly sensitive to temperature. Consequently, fire safety presents a potential hazard that should be taken into account when designing. This paper presents an experimental full-scale fire test carried out on the Vulcain furnace of CSTB Champs-sur-Marne on its 7m x 4 m horizontal configuration, in order to test a new fire design method proposed for PIRs. The 2.94 x 2 x 0.15 m 3 tested slab was mechanically loaded by 325 kg and heated following the ISO 834-1 time-temperature curve until its collapse. The experimental time of collapse is compared to that predicted by the new design method.

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Anchorage and detailing of reinforcement under fire action

Muciaccia

2022

Structural Concrete

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In recent years, an increasing attention was devoted to evaluating the effects of temperature exposure on the bond properties between a steel bar and the surrounding concrete, with a lower focus on the effects on bond length and, more in general, on the consistency among existing design models, when considering a fire scenario. The current paper proposes a unified approach for both cast‐in and post‐installed rebars to evaluate the effects of temperature exposure on bond length and reinforcement detailing in reinforced concrete members in bending subjected to a simulated fire event. Starting from a consistent evaluation of decay of bond properties as a function of temperature, different geometrical configurations of beam/slab to column/wall connections are considered. For a given fire duration, the impact on bond length is evaluated as a function of bar position and size, also focusing on the potential modifications in the overall load‐transfer mechanism, when bond properties are excessively impaired.

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Effect of heating rate on bond failure of rebars into concrete using polymer adhesives to simulate exposure to fire

Cited by 24 publications

References 14 publications

Parametric Analysis of Seismic Behavior for Steel-to-Concrete Connection Subjected to Combined Moment and Shear Loading

Parametric Analysis of Seismic Behavior for Steel-to-Concrete Connection Subjected to Combined Moment and Shear Loading

Fire design of post-installed bonded rebars: Full-scale validation test on a 2.94 × 2 × 0.15 m3 concrete slab subjected to ISO 834-1 fire

Anchorage and detailing of reinforcement under fire action

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Effect of heating rate on bond failure of rebars into concrete using polymer adhesives to simulate exposure to fire

Cited by 24 publications

References 14 publications

Parametric Analysis of Seismic Behavior for Steel-to-Concrete Connection Subjected to Combined Moment and Shear Loading

Parametric Analysis of Seismic Behavior for Steel-to-Concrete Connection Subjected to Combined Moment and Shear Loading

Fire design of post-installed bonded rebars: Full-scale validation test on a 2.94 × 2 × 0.15 m3 concrete slab subjected to ISO 834-1 fire

Anchorage and detailing of reinforcement under fire action

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Product

Resources

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Fire design of post-installed bonded rebars: Full-scale validation test on a 2.94 × 2 × 0.15 m3 concrete slab subjected to ISO 834-1 fire