Developments and research on fire response behaviour of prestressed concrete members – A review

Jeyashree, T. M.; Rajkumar, P.; Satyanarayanan, K.S.

doi:10.1016/j.jobe.2022.104797

Cited by 8 publications

(6 citation statements)

References 57 publications

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“…This creates a highly nonlinear mechanical scenario [20], particularly pronounced in prestressed structures, further intensifying the demands. A better comprehension of prestressed members under fire condition or an environment of elevated temperatures is needed to ensure safety of buildings [18].…”

Section: Thermal Expansion Coefficientmentioning

confidence: 99%

“…The exposure of concrete to high temperatures usually leads to several interconnected issues. A validated approach to describe the thermo-mechanical behaviour of concrete is based on considering separately the three phenomena that characterize the process: the thermal damage, the mechanical response and the thermal response [16][17][18][19][20]. Luccioni et al [20], have proposed an incrementally uncoupled numerical solution technique, where the thermal problem-thermal damage is despised, and a stagger scheme is adopted.…”

Section: Thermo-mechanical Behaviour 221 Incrementally Uncoupled Solu...mentioning

confidence: 99%

“…Performing full-scale tests on entire structures can be impractical due to factors such as the difficulty of the test and poor measurement accuracy [15]. It is common to validate numerical results for structural members rather than for the entire structure due to the challenges associated with testing the complete structure [18]. Furthermore, the employment of numerical results can assist in the comprehension of experimental outcomes and the enlargement of conclusions [19].…”

Section: Introductionmentioning

confidence: 99%

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On the effect of thermal expansion coefficient in prestressed concrete beams

Ruano,

Quintana,

Scala

et al. 2024

Preprint

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Prestressed concrete beams are commonly employed for building concrete slabs. These structures could be exposed to accidental fires and recently there has been a significant effort to understand how them perform under extreme load conditions. One key issue is the stress state of prestressed concrete beams subjected to thermal loads because stresses vary in time according to the temperature profile and are added to the prestressing process. For high temperature and transient thermo-mechanical analysis, temperature-dependent properties are extensively employed. Slender structures, like prestressed beams, are particularly sensitive to temperature changes, unlike the more robust cross-sections found in reinforced concrete. Particularly this paper analyses the structural influence of the coefficient of thermal expansion in slender structures subjected solely to high temperature through validation with experimental tests. Additionally, subjecting the structure only to a temperature rise does not overlap for other effects such as mechanical loads. The mechanical response of the tests under high temperature is noteworthy, and the finite element numerical analysis is used to properly capture the influence of the temperature-dependent coefficient of thermal expansion in these structures. A better understanding of this problem is achieved and structural engineers could be aware of the use of commonly used temperature-dependent properties into their assessments.

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Section: Thermal Expansion Coefficientmentioning

confidence: 99%

Section: Thermo-mechanical Behaviour 221 Incrementally Uncoupled Solu...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the effect of thermal expansion coefficient in prestressed concrete beams

Ruano,

Quintana,

Scala

et al. 2024

Preprint

View full text Add to dashboard Cite

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“…Fire is a common hazard in high-rise buildings (Jiang et al, 2020; Ding et al, 2021; Rahardjo and Prihanton, 2020). The mechanical properties of concrete materials deteriorate significantly at elevated temperatures (Chen et al, 2020; Li et al, 2002; Jeyashree et al, 2022). Hence, concrete components experience significant strength deterioration when exposed to high temperatures during a fire (Udi et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on post-fire behaviour of a novel assembled wall-slab joint

Shen

et al. 2023

Advances in Structural Engineering

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In this study, the post-fire behaviour of a novel assembled wall-slab joint with high-performance concrete (HPC) post-casted in the core area was experimentally investigated. Fire and post-fire monotonic static loading tests were performed on three full-scale specimens, including two assembled joints and one cast-in-place joint for comparison. The temperature distribution inside the joints exposed to fire, failure displacement and failure mode of the joints after a fire, and residual bearing capacity of the joints are discussed. The results show that the assembled wall-slab joints are more integral than the cast-in-place joints after a fire. In addition, HPC can effectively reduce the temperature in the core area of an assembled joint exposed to fire and improve its post-fire stiffness. The failure modes of the two types of joints were also different. The residual bearing capacity of the assembled wall-slab joint after 1.5 h of heating was approximately 22.3% lower than after 1 h of heating. In addition, the residual bearing capacity of the assembled wall-slab joint was approximately 28% larger than that of the cast-in-place wall-slab joint at the same heating time of 1.5 h. In general, the assembled wall-slab joint showed better performance than the cast-in-place joint both during and after a fire.

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“…In China, the mileage of the Chinese high-speed railway reached 40,000 km by 2021, ranking first among all countries and regions. Simply supported prestressed concrete (PC) box girders are used extensively in high-speed railway bridges due to their high strength, excellent resistance to cracking, and outstanding seepage resistance [2]. Complex climatic environments increase the chances of chlorides reaching the surface of the prestressing strands and causing them to corrode [3].…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Corroded High-Speed Railway Simply Supported Prestressed Concrete Box Girder

et al. 2023

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Simply supported prestressed concrete (PC) box girders have been widely adopted in high-speed railway bridges. In complex climatic environments, the corrosion of the prestressing strands always occurs and deteriorates the flexural behavior of PC box girders. In the present study, six T-shaped scaled beams were designed and fabricated according to the specifications for a high-speed railway PC box girder. The corrosion process of the prestressing strand in scaled beams was experimentally simulated by using the constant current accelerated corrosion method. The flexural behavior of corroded high-speed railway simply supported PC box girders was then investigated through four-point bending tests and theoretical investigation. The experimental results showed that strand corrosion significantly decreased the flexural behavior of the test beams. When the mass loss was 12.30%, the cracking load, ultimate load, and ductility decreased by 27.8%, 29.9%, and 11.5%, respectively. The effect of strand corrosion on flexural stiffness displayed a difference before and after concrete cracking. The failure mode changed when strand mass loss was above a critical value (7%). The flexural bearing capacity degradation law of corroded PC beams could be divided into two distinct stages. A strand mass loss of less than 7% could lead to a linear degradation law with a relatively slight reduction. As mass loss increased, it exhibited an exponential and sharp declining trend. An analytical model including the effects of strand cross-section reduction, strand property deterioration, and concrete cracking was also proposed to predict the flexural behavior of corroded PC beams. By comparison with the experimental data, it was found that the model could predict the cracking moment, flexural bearing capacity, and failure mode well.

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Developments and research on fire response behaviour of prestressed concrete members – A review

Cited by 8 publications

References 57 publications

On the effect of thermal expansion coefficient in prestressed concrete beams

On the effect of thermal expansion coefficient in prestressed concrete beams

Experimental study on post-fire behaviour of a novel assembled wall-slab joint

Flexural Behavior of Corroded High-Speed Railway Simply Supported Prestressed Concrete Box Girder

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