Performance of reinforced concrete beam column joint under high temperature

Parthasarathi, N.; Satyanarayanan, K.S.; Thamilarasu, V.

doi:10.1016/j.matpr.2020.03.497

Cited by 7 publications

(6 citation statements)

References 5 publications

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“…Finally, neural network models can anticipate RC beam rehabilitation using CFRP laminates, making them useful structural engineering tools. These results improve FRP rehabilitation procedures for RC structure performance and lifetime [14,31].…”

Section: Discussionmentioning

confidence: 66%

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Transient state analysis of rehabilitated RC beams using finite element modelling and prediction using an artificial neural network

2024

Eng. Res. Express

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The present research develops and verifies a simpler numerical approach for analyzing the thermal transient state of rehabilitated concrete beams reinforced with various types of FRP (fiber-reinforced polymer) subjected to high temperatures and specifically built as under-reinforced concrete beams. This approach offers a straightforward, efficient, and exact instrument for numerical analysis. The proposed analytical technique has been validated by load-displacement curves and cross-section temperature data, indicating its dependability and practicality. Subsequently, the validated approach was used to examine the impact of significant variables on the outcome and restoration of FRP-reinforced concrete beams at high temperatures. The methodology gives the Comparing conventional and CFRP, GFRP, AFRP reinforced beams using beam, truss, and shell elements. Thermal and UDL loads were applied, mesh at 25mm x 25mm. Transient analysis contrasts performance via displacement and temperature. The temperature vs. displacement curve shows the FRP comparisons. Identifying the critical temperature before failure is crucial, emphasizing the curve's significance in assessing structural performance and potential failure points. Nodal temperatures ranged 939-963°C (rehabilitated) vs 958°C (conventional). 200°C difference affects thermal boundary conditions for structural analysis and Conventional peaks at 320°C, while AFRP, GFRP, and CFRP reach 358°C, 385°C, and 390°C respectively. CFRP lasts 2400 minutes. Neural network models demonstrate effective generalizability, enabling satisfactory predictions of RC beam rehabilitation with CFRP laminates within the study's parameter range.

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Section: Discussionmentioning

confidence: 66%

“…The material properties, detailed below, guide the FEA: concrete is modelled with nonlinear behavior, steel reinforcement follows conventional properties, and FRPs are treated as linear elastic materials. Figure 2 shows the nonlinear behavior of stress versus strain for concrete [14].…”

Section: Materials Idealizationmentioning

confidence: 99%

Transient state analysis of rehabilitated RC beams using finite element modelling and prediction using an artificial neural network

2024

Eng. Res. Express

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“…The study observed the temperature within the specimen with the thermocouple that is k type for a time interval of every 10 minutes. The results showed that the under elevated temperatures in the joints the rotations changed in them [17]. An experimental analysis on three RC frames of varied lengths and same height under an incident of re showed that all of the three structures endured the re for an hour with no deformation at the phase of heating.…”

Section: Literature Reviewmentioning

confidence: 94%

Evaluation of RC Elements Under High-Temperature Conditions with different Locations: Analytical Investigation

Parthasarathi

Satyanarayanan

Prakash

et al. 2023

Preprint

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Developments in the field of construction has taken an encompassing transformation in the design of structures. Concrete technology has also seen several advancements with the inclusion of reinforcement materials like steel and iron in them which are called as the (RC) Reinforced Concrete. Amidst several developments in the technology of the structural design for a quality construction, RC structural element failure under higher temperature with load remains as one of the most critical mechanisms to be addressed with the recent advancements. There are several methods and studies that try to rule out such failure mechanism with certain improvised methodologies in the fire resistivity behavior of concrete structures. Nevertheless, only a few studies have concentrated on the interaction between the structural and functional elements in the emergence of fire. Considering this, the present work concentrates on the behavior of RC infilled frames with elements like beam, column and beam column joints under higher temperatures and load for which the ABAQUS finite element software is used. The model is simulated with a transient state analysis and characteristics like deflection, stiffness, principal stress are studied for the RC beam, column and beam column joints with varied temperature and load. The outcome of the simulation shows the effect of load and temperature on RC elements and the respective performance graphs are plotted.

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“…Studies on the behaviour of reinforced concrete joints during and after fire have mainly focused on beam-column joints. Studies have shown that cracks occur in beam-column joints after exposure to high temperatures, and that the number of cracks gradually increases with increasing temperature (Parthasarathi et al, 2021). Beam–column joints with different connection types have different crack distributions and failure modes after a fire (Song et al, 2017; Kong et al, 2019).…”

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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Performance of reinforced concrete beam column joint under high temperature

Cited by 7 publications

References 5 publications

Transient state analysis of rehabilitated RC beams using finite element modelling and prediction using an artificial neural network

Transient state analysis of rehabilitated RC beams using finite element modelling and prediction using an artificial neural network

Evaluation of RC Elements Under High-Temperature Conditions with different Locations: Analytical Investigation

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

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