Fire Resistance of Composite Beams with Restrained Superposed Slabs

Lyu, Junli; Chen, Qichao; Xue, Huizhong; Yong-yuan, Cai; Lyu, Jingjing; Zhou, Shining

doi:10.1155/2020/7109382

Cited by 7 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, it was proven that the flexural capacity for two case of shear connection was almost the same. [9] investigated the fire resistance of composite beams with restrained superposed slabs. Three specimens were tested under uniformly distributed loads in a furnace.…”

Section: Introductionmentioning

confidence: 99%

The performance of composite beams with X-HVB shear connectors after being subjected to fire exposure

Hamad

Muteb

Salah³

2023

Preprint

View full text Add to dashboard Cite

Composite construction has emerged as a highly effective methodology for construction in recent decades, typically involving hot-rolled steel beams, profiled seel decks, welded bolts, and an in-situ concrete slab reinforced with a steel mesh. This construction method offers numerous benefits, including damage resistance, good service response, and low cost. The advantages can be further enhanced through the use of X-HVB shear connectors instead of traditional weld-on bolts. X-HVB connectors offer two additional benefits: they can be used in cold rolled profiles, wet sections or rehabilitation elements, and their installation is simple and safe. The connectors are made of cold-rolled steel and come in a range of nominal heights from 40 to 140 mm. However, little previous research has focused on how the X-HVB connectors behave and affect composite beams during a fire. To investigate this, an experimental study was conducted that focused on the effect of fire exposure, the orientation of the corrugated steel plate to the steel beam, and the side of exposure to fire (from the concrete slab or steel beam). Six composite beam specimens were prepared to investigate shear strength, stiffness, and ductility, with load-deflection results obtained from the experimental work validated with proposed Digital Image Correlation (DIC) based technique results. The experimental results indicate that the capacity, stiffness and ductility of composite beams decreased upon exposure to firing, especially for those with transverse corrugated steel plates. The direction of fire exposure also had a significant impact. The DIC technique results aligned well with the test results.

show abstract

Section: Introductionmentioning

confidence: 99%

The performance of composite beams with X-HVB shear connectors after being subjected to fire exposure

Hamad

Muteb

Salah³

2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Steel has been used extensively in construction, followed by issues of fre resistance and elevated temperature resistance of steel structures [1]. In the case of fre, the mechanical properties of ordinary steel (such as strength and elastic modulus) will degrade sharply with the increase in temperature [2].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of High-Strength Bolted Joints Fabricated from Fire-Resistant Steel at Elevated Temperatures

Wang

Li²,

Liu³

et al. 2022

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

The use of fire-resistant steel is an effective way to alleviate fire safety issues in steel structures. Considering the limited research on bolted joints fabricated from fire-resistant steel, this study presents the results of the experimental investigation on the mechanical behavior of 40 specimens of bolted joints at room temperature and elevated temperatures (20°C∼700°C). These specimens are assembled with fire-resistant steel plates and fire-resistant high-strength bolts (or ordinary high-strength bolts). The mechanical behavior of these specimens was investigated, which included the failure mode, deformation performance, and degradation of bearing capacity. The experimental results show that the treatment of the friction surface (specifically, impeller blasting and sprayed hard quartz sand) has a negligible effect on the ultimate strength of specimens and a relatively significant effect on the slip strength. In addition, reduction factors of the tensile strength (KN) and slip strength (KS) for both fire-resistant bolt specimens and ordinary high-strength bolt specimens decrease with the increase in temperature, especially in the case of elevated temperatures ranging from 400°C to 700°C. Prediction models with different reliability degrees are proposed to calculate the degradation of tensile strength under elevated temperatures, which has the potential to be used for the fire-resistant design of steel connections and structures.

show abstract

Fire behavior of high‐contents recycled aggregate concrete composite slabs with small openings

Kefyalew,

Imjai,

Garcia

et al. 2024

Structural Concrete

View full text Add to dashboard Cite

Recycled aggregate concrete (RAC) is increasingly being used in the construction of structural elements. However, the performance of RAC elements under fire is usually considered to be inferior to that of normal concrete (NC) elements. This study investigates the fire behavior of RAC composite steel slabs with and without openings. Ten slabs of size of 1.0 m × 2.2 m were cast either with no opening, one or two circular openings, and one or two square openings. Five of the slabs were manufactured with 100% RAC, while the other five slabs were made with NC. The concrete slabs were loaded and subjected to fire tests at a temperature of about 900°C for 120 min. Test results show that RAC composite slabs have lower stiffness (thus larger mid‐span deflections) under fire exposure compared to their counterpart NC slabs. In terms of the recorded temperature–time curves, RAC slabs showed similar performance to that of NC slabs. The ratio of soffit temperature to the temperature at the top of slab was considerably smaller for RAC slabs compared to NC slabs. RAC slabs also showed more spalling than NC slabs. Experimental test results were numerically verified using PyroSim® software with the two showing good agreement. A series of new design charts for composite RAC slabs with desired fire endurance are proposed. This study is expected to promote the wider use of RAC in construction of structural elements, particularly of composite slabs exposed to extreme temperatures.

show abstract

Fire Resistance of Composite Beams with Restrained Superposed Slabs

Cited by 7 publications

References 2 publications

The performance of composite beams with X-HVB shear connectors after being subjected to fire exposure

The performance of composite beams with X-HVB shear connectors after being subjected to fire exposure

Mechanical Behavior of High-Strength Bolted Joints Fabricated from Fire-Resistant Steel at Elevated Temperatures

Fire behavior of high‐contents recycled aggregate concrete composite slabs with small openings

Contact Info

Product

Resources

About