Performance of steel–concrete composite structures in fire
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Abstract This paper presents a review of recent studies of the behaviour of steel–concrete composite structures in fire, including an assessment of research investigations and their implications on fire‐resistant design of composite structures. The paper focuses on the three main parts of composite structure: floor systems, columns and joints. The section on composite floor systems includes bending behaviour of conventional composite floor/beam system with composite slabs on top of a solid steel I‐beam; tensile membrane action in this system; slim‐floor construction; composite cellular beam; composite truss and composite beam with precast concrete slabs. The section on composite columns includes studies of concrete‐filled tubular (CFT) column; design of composite columns and performance of CFT columns within structures. The section on joints covers both steel and composite joints, including experiments on joints in fire; finite element simulation; the component method; behaviour of different joint components at elevated temperatures and implications of joint behaviour on steel and composite structural behaviour in fire. Within each section, wherever appropriate, the effects of whole structural behaviour are discussed. Furthermore, potential future research studies are identified to help understand the subject and develop improved performance‐based practical fire resistant design calculation methods.Keywords:
Precast concrete
Composite construction
Fire performance
Structural system
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Engineered wood
Fire performance
Solid wood
Cross laminated timber
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Citations (27)
There are a lot of concerns on safety structure performance by being buildings to be large and high-rise. In particular, damage due to the fire recently leads to a large disaster and therefore a variety of countries operate the regulation on the fire resistance performance depending on the building structure. There are differences on the fire resistance design in each country but 50% of the design load is suggested to be reasonable for the normal temperature during the fire by applying the concept of the loading ratio to the fire resistance design of structures. Since the loading ratio is the factor having a major impact on the evaluation of the fire resistance performance, it should be preferentially considered. The study on setting up the loading ratio to evaluate the fire resistance performance and safety of structures has yet to be fully furnished in South Korea. Therefore, in this paper, the loading ratio proper for the construction status in South Korea is to be taken into account and then the ratio is to be proposed on the single reinforcement beam.
Fire performance
Resistance Factors
Fire protection engineering
Aspect ratio (aeronautics)
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A full-scale three-storey precast building was tested under seismic conditions at the ELSA Laboratory in the framework of the SAFECAST project. The unique research opportunity of testing a complete structural system was exploited to the maximum extent by subjecting the structure to a series of PsD tests and by using four different structural layouts of the same mock-up, while approximately 160 sensors were used to monitor the response of each layout. The main investigated parameter among all four structural configurations was the behavior of the mechanical connections between various precast elements. Dry mechanical connections were adopted to realize the joints between: floor-to-floor, floor-to-beam, wall-to-structure; column (and wall)-tofoundation and beam-to-column. The results demonstrate that the new beam-to-column connection system is a viable solution toward enhancing the response of precast RC frames subjected to seismic loads, in particular when the system is applied to all joints and strict quality measures are enforced in the execution of the joints.
Precast concrete
Structural system
Seismic loading
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A test was conducted in this paper to learn the fire-resistant performance of cotton straw brick wall. According to the thickness of current non-load-bearing wall, selecting the size of 200 mm × 400 mm × 200 mm of cotton straw bricks tie into 250 mm × 450 mm × 625 mm wall as the test components. According to the construction of fire test method part 8: non-bearing the special requirements of vertical separation of components (GB/T9978·8–2008) to study the fire integrity and fire insulation, judge the duration of fire resistance of the specimen. The test results show that the non-load-bearing wall with small size high density cotton grass brick has a good fire-resistant performance, and the duration of fire resistance is more than 70 minutes.
Brick
Fire performance
Load bearing
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This research study investigated the fire performance of steel columns strengthened with Carbon Fibre Reinforced Polymers (CFRP). Using thermal and mechanical property tests, full scale fire tests and numerical analyses, it showed that suitable insulation layers can be successfully used to increase their fire resistance to required levels. It then developed new design guidelines to determine the fire resistance of CFRP strengthened and insulated steel columns.
Fire performance
Full scale
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Fire and post-fire behaviours of reinforced concrete columns confined by circular steel tubes, also known as circular steel tube confined reinforced concrete (STCRC) columns, are investigated in this paper. 5 full-scale specimens exposed to fire and 47 specimens after fire exposure were tested. Temperatures across the sections, displacement versus time curves, fire resistance, load versus displacement responses and load-bearing capacities were measured and discussed. A finite element (FE) model was developed using the program ABAQUS, and validated against the test results from the present study. Simplified design methods were proposed for predicting the fire resistance and residual load-bearing capacity of the STCRC columns under and after fire exposure, respectively.
Fire performance
Load bearing
Fire test
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A fire resistant performance is very an important factor for sustaining of the structural stability in a building when the building is covered with a severe fire. In this study, to evaluate the fire resistant characteristics of the beams designed with FR steel and TMC FR steel, a fire engineering method was applied. The results showed that the beam using a FR steel reveals a litter better structural performance than that of TMC FR steel.
Fire performance
Fire protection engineering
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Fire performance
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A fire resistance test was carried out for a no infill steel fire door, base on the test data analysis and the observation, combined with relative standard to evaluate the fire resistant performance, this fire door has good integrity performance, but with poor insulation performance.
Infill
Fire performance
Fire test
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Fire performance
Eccentricity (behavior)
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