A Review of Precast Concrete Beam‐to‐Column Connections Subjected to Severe Fire Conditions

Radzi, Noor Azim Mohd.; Hamid, Roszilah; Mutalib, Azrul A.; Kaish, A. B. M. A.

doi:10.1155/2020/8831120

Cited by 11 publications

(3 citation statements)

References 72 publications

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“…Fire-induced failure of connections can occur with any construction material, and adequate fire protection is always an important factor. Materials such as concrete (Mohd Radzi et al 2020) and steel have been well studied, and fire protection methods are generally straightforward. However, timber can create challenges.…”

Section: Fire Performance Concerns With MMC Joints and Connectionsmentioning

confidence: 99%

Fire performance and regulatory considerations with modern methods of construction

Meacham¹

2022

Buildings and Cities

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Modern methods of construction (MMC) are becoming increasingly popular for a broad range of reasons. They are portrayed as providing significant economic and sustainability benefits over 'traditional' construction methods, e.g. efficiencies gained by integrating the processes and technologies of design, manufacturing, and construction to result in higher quality buildings. It may also include a reduction in delivery times, more predictable costs, and fewer environmental impacts. However, MMC introduces increased complexity and 465 Meacham Buildings and Cities

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Section: Fire Performance Concerns With MMC Joints and Connectionsmentioning

confidence: 99%

Fire performance and regulatory considerations with modern methods of construction

Meacham¹

2022

Buildings and Cities

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“…Although concrete has good fire resistance, its mechanical properties may deteriorate under elevated temperatures, leading to explosive spalling and irreparable damage to the structure, which endangers the overall safety of the structure [35][36][37]. Therefore, it is necessary to study the fire resistance performance of concrete [38][39][40]. Appropriate fire safety requirements specified in the building code for concrete structural elements must be met.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Mechanical Properties of Crumb Rubber Concrete after Elevated Temperature

Yang

Lv²,

Bai

et al. 2023

Polymers

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To reduce the environmental damage caused by waste rubber, crumb rubber concrete (CRC) was prepared by replacing some fine aggregates with crumb rubber. The effects of elevated temperature as well as crumb rubber content on the mechanical properties of the prepared CRC were studied. The crumb rubber contents were 0%, 10%, and 20%, while CRC was subjected to atmospheric temperatures (AT) of 300 °C, 500 °C, and 700 °C. The concrete without crumb rubber content was used as the control group at the atmospheric temperature. The mass loss, thermal conductivity characteristics, compressive strength, splitting tensile strength, axial compressive strength, elastic modulus, and stress-strain characteristics of CRC at elevated temperatures were studied. The experimental results show that: (1) With the increase in crumb rubber content and temperature, the cracks on the surface of the specimen gradually widen while the mass loss of the specimen increases. (2) With the increase in crumb rubber content and temperature, the cube compressive strength, splitting tensile strength, axial compressive strength, and elastic modulus of CRC decrease, yet the plastic failure characteristics of CRC are more obvious. (3) The influences of elevated temperature on strength and elastic modulus are as follows: splitting tensile strength > elastic modulus > axial compressive strength > cubic compressive strength. (4) With the increase in temperature, the stress-strain curve of the CRC tends to flatten, the peak stress decreases, and the corresponding peak strain significantly increases. With the increase in crumb rubber content, there is a great decrease in peak stress, yet the corresponding peak strain is basically the same. The use of CRC can be prioritized in applications that increase toughness rather than strength.

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“…Finite element simulation using computer software can perform analysis for various engineering problems. Computer software such as ABAQUS, VULCAN, ADAPTIC, DIANA, and ANSYS can be used in transient structural analysis and coupled thermal structural analysis of beam-to-column connections (14)(15)(16). Finite element simulations can confirm experimental findings, predict thermal and structural behaviour using different parameters, and improve engineering recommendations.…”

Section: Introduction and Objectivesmentioning

confidence: 99%

Nonlinear coupled thermal-structural analysis of precast concrete beam-to-column connections at high temperatures

Radzi¹,

Kamal²,

Azuha³

et al. 2023

Res. Eng. Struct. Mater.

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This paper presents a nonlinear coupled thermal-structural analysis using ANSYS Workbench to determine precast beam-to-column connections' thermal and structural behaviour. Three precast connection models, a concrete corbel, a concrete nib, and an inverted E steel nib, are exposed to ambient and cellulose fire curves. Firstly, the precast connection models are verified based on the previous experimental result at ambient temperature. Then, the verified precast connection models are exposed to the cellulose fire curve for two hours before being loaded to failure. The results are compared with the recent experimental fire test conducted by the authors. Based on the result, finite element models at ambient temperature were validated with a percentage difference of less than 10%. However, finite element models at high temperatures were not verified due to the percentage difference exceeding 10 %. The significant difference was due to the non-uniformity of sample dimensions and different test setups in the previous experiment. Finite element models for concrete corbel and inverted E steel nib have a higher stiffness than the experimental sample. However, the finite element model for concrete nib has a lower stiffness than the experimental sample. Concrete nib recorded the most significant thermal percentage deterioration (32.1 % and 57.4 %) compared to concrete corbel (22.4 % and 11.52 %) and inverted E steel nib (26.9 % and 27.9 %). The validation result of nonlinear coupled thermal-structural analysis executed using ANSYS Workbench gives good efficiency for predicting the fire performance of precast concrete corbel beam-to-column connections at high temperatures.

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A Review of Precast Concrete Beam‐to‐Column Connections Subjected to Severe Fire Conditions

Cited by 11 publications

References 72 publications

Fire performance and regulatory considerations with modern methods of construction

Fire performance and regulatory considerations with modern methods of construction

Experimental Study on the Mechanical Properties of Crumb Rubber Concrete after Elevated Temperature

Nonlinear coupled thermal-structural analysis of precast concrete beam-to-column connections at high temperatures

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