Load and temperature influence on the post-fire mechanical properties of steel reinforcements

Ferri, Andrés Lapuebla; Pons, David; Romero, Manuel L.

doi:10.1016/j.jcsr.2021.106866

Cited by 7 publications

(8 citation statements)

References 15 publications

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“…The results from another experimental works are also plotted in Figure 5 for comparison purposes. In a previous work of Lapuebla-Ferri et al [15] it was obtained the dependence of crit on the degree of utilisation for B 500 SD reinforcing steel bars:…”

Section: Resultsmentioning

confidence: 99%

“…A special attention was put on residual ductility, which is quantified and compared with the provisions of Eurocode 3 [14]. A similar approach was carried out in a recent work of Lapuebla-Ferri et al [15], but applied to steel reinforcing bars for reinforced concrete structures.…”

Section: Dpt Of Continuum Mechanics and Theory Of Structuresmentioning

confidence: 99%

“…To the best of the authors' knowledge, the joint influence of high temperature and load in the post-fire behaviour of structural materials has been studied in only a few works (see [15]).…”

Section: Post-fire Loaded Tests (Pfl)mentioning

confidence: 99%

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Post‐fire Residual Strength and Ductility of Structural Steels from Hollow Sections

2022

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Steel structures are severely affected by the extreme temperatures reached during a fire. After this, if the structure has not collapsed, the remaining elements can be reused if they are not excessively distorted or the material is still fit for service. In the last case, residual properties of steel must be adequate and fulfil the requirements of the current standards. On this matter, it is hypothesized that residual behaviour of steel not only depends on the highest temperature reached during the fire episode, but also on the load it was simultaneously bearing. This work is focused on an experimental study on the post‐fire behaviour of structural steels. Specimens were cut from structural steel (S355) cold‐formed circular hollow sections (CHS) and subjected to a combination of tensile stress and high temperature. Afterwards, the specimens were cooled in air back to room temperature and, finally, load was increased until specimen failure. The obtained results allowed discussing on the residual yield strength, ultimate strength and stiffness of the steel, and a special focus was put on the residual ductility. The results of this work can provide a basis to the appraisal of steel structures after fire, supporting the further decision on its reinstatement or subsequent demolition.

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Section: Resultsmentioning

confidence: 99%

Section: Dpt Of Continuum Mechanics and Theory Of Structuresmentioning

confidence: 99%

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Post‐fire Residual Strength and Ductility of Structural Steels from Hollow Sections

2022

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“…The experimental setup is depicted in Figure 1 and it was used in previous works of the authors [7][8]. It consisted of a hydraulic universal testing machine equipped with a 200 kN load cell, controlled by a closed-loop system.…”

Section: Methodsmentioning

confidence: 99%

“…The combined influence of load and temperature in the post-fire behaviour of steel has been studied in a few works on mild steel [7][8] but there are no works concerning HSS.…”

Section: Post-fire Loaded Tests (Pfl)mentioning

confidence: 99%

Influence of load and high temperature on the post‐fire behaviour of high‐strength structural steels

Lapuebla‐Ferri,

Pons,

Romero

et al. 2023

ce papers

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In this work, an experimental campaign was carried out to evaluate the post‐fire mechanical performance of high‐strength steel specimens (grade S700) when being subjected simultaneously to different combinations of tensile load and elevated temperature. To this end, transient‐state tests were firstly carried out to obtain the ‘critical temperature’, i.e., the temperature at which a specimen failed while being simultaneously subjected to tensile load and heated at a constant temperature rate. Secondly, post‐fire tests were performed on unloaded as well as loaded specimens. For that purpose, specimens were heated to temperatures below the critical temperature, cooled down in air and finally submitted to tensile testing. In order to investigate the influence of production route, specimens were extracted from cold‐formed circular hollow sections and hot‐rolled sheets. Moreover, coupons with five different thicknesses were tested to investigate the influence of section thickness on the post‐fire behaviour. Residual values of yield strength, ultimate strength, elastic modulus and ductility were determined from the tests and discussed.

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Shear behavior of reinforced concrete beams with high-strength reinforcements after high temperatures

ZHAO,

DENG,

CAI

et al. 2024

Construction and Building Materials

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Load and temperature influence on the post-fire mechanical properties of steel reinforcements

Cited by 7 publications

References 15 publications

Post‐fire Residual Strength and Ductility of Structural Steels from Hollow Sections

Post‐fire Residual Strength and Ductility of Structural Steels from Hollow Sections

Influence of load and high temperature on the post‐fire behaviour of high‐strength structural steels

Shear behavior of reinforced concrete beams with high-strength reinforcements after high temperatures

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