Thermo-mechanical analysis on shear behavior of grooved connectors for glulam-concrete composite beams under fire

Shi, Danrong; Hu, Xiamin; Du, Hao; Meng, Yanfei; Xie, Zhinan

doi:10.1016/j.firesaf.2022.103594

Cited by 11 publications

(6 citation statements)

References 20 publications

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“…Before experimenting, it must be planned. The main goals of experiment design are to minimize the number of tests that need to be performed and maximize the accuracy of measurements while maintaining the statistical reliability of the results [30].…”

Section: Methodsmentioning

confidence: 99%

Testing wood-composite reinforced specimens for shearing along fibers

Lisyatnikov,

Lukin,

Martinov

et al. 2023

E3S Web of Conf.

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With the development of chemical technologies, new building materials and products based on them appear. Such materials are used both in the production of new structures and in the strengthening of existing elements. A method of strengthening with glass and carbon fabrics has proven itself in reinforced concrete structures. We have developed a method for reinforcing high wood-glued beam structures with a polymer composite in the support zones. The composite consists of fiberglass impregnated with epoxy. To increase the strength, carbon nanotubes are included in the polymer composition. To confirm the effectiveness of this amplification, it is necessary to carry out numerical and experimental studies. In order to save labor costs, planning a multivariate experiment and machine tests of standard samples with and without amplification is first carried out. As a result of the test for chipping along the fibers of prototypes, it was found that the tensile strength of reinforced samples compared to wooden ones without reinforcement increased by 49%, which is the optimal value for full-scale tests.

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Section: Methodsmentioning

confidence: 99%

Testing wood-composite reinforced specimens for shearing along fibers

Lisyatnikov,

Lukin,

Martinov

et al. 2023

E3S Web of Conf.

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“…According to the numerical model from Shi et al (2022b), the temperatures of the notched wood were higher than that of the wood with the same fire-exposed distance. The temperature of the notched wood can be calculated as,…”

Section: Under Iso Fire Conditionsmentioning

confidence: 99%

Shear stiffness of notched connectors in glue laminated timber-concrete composite beams under fire conditions

Shi

Zhang

et al. 2022

BioRes

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Shear connectors ensure effective interaction between wood beams and concrete slabs of composite beams, and their properties noticeably affect the fire resistance of timber-concrete composite beams. To investigate the shear stiffness of notched connectors in glued laminated timber (GLT)-concrete composite beams under fire conditions, 16 shear tests were conducted. The effects of fire duration and notch length on shear properties of the connectors for a given spacing were studied. The fire tests indicated that the reduction of the notch length from 200 mm to 150 mm remarkably affected the failure mode of the shear specimens, changing from compression failure of notched wood to shear failure of notched concrete. The increase in fire duration reduced effective width of the notched wood, negatively affected the shear stiffness and shear capacity of the connectors, and the shear stiffness decreased more rapidly. The notch length did not have a substantial effect on the shear stiffness of connectors. Based on the experimental results, an analytical model to estimate the shear stiffness of notched connectors in GLT-concrete beam under fire conditions was established.

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“…In addition to the fire tests, finite element (FE) models were developed to simulate the fire behavior of the TCC structures (O'Neill et al 2014;Caldová et al 2015;Dagenais et al 2016;Shi et al 2022). Dagenais et al (2016) established 1-D finite element models of three TCC floors based on experimental studies discussed earlier to predict the timevarying TCC floor deflection.…”

Section: -D Finite Element Modelmentioning

confidence: 99%

“…The coupled thermo-mechanical analysis results showed that although the model could not capture the variation of displacement caused by the thermal expansion of the concrete slab or the charring of the wood during the tests, it could accurately predict the final displacement and fire resistance time of the floor. Shi et al (2022) established a 3-D finite element thermo-mechanical coupling analysis using ABAQUS software, reproduced shear tests of TCC specimens under fire, and carried out parametric analysis. The material properties of wood, concrete, and screws are taken from EN 1995-1-2 (2003), EN 1992-1-2 (2004), and EN 1993-1-2 (2005, respectively.…”

Section: -D Abaqus Finite Element Modelmentioning

confidence: 99%

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Review of connections for timber-concrete composite structures under fire

Shi

Hong

et al. 2022

BioRes

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A timber-concrete composite structure has the advantages of energy saving, environmental protection, and low carbon, and has wide application prospects. However, the effects of fire on timber-concrete composite structures are complicated. It is important to study the fire performance of connections and their influencing factors for the promotion and application of timber-concrete composite structures. This paper summarizes the research progress of connections for timber-concrete composite structures under fire. Firstly, research on the performance of connections in timber-concrete composite structures under fire is introduced, including screwed connections, notched, and grooved connections, and steel truss plate connections. Secondly, the calculation methods focused on connections of timber-concrete composite structures under fire are introduced. Finally, the main points of modeling timber-concrete composite structures under fire are also briefly introduced.

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Thermo-mechanical analysis on shear behavior of grooved connectors for glulam-concrete composite beams under fire

Cited by 11 publications

References 20 publications

Testing wood-composite reinforced specimens for shearing along fibers

Testing wood-composite reinforced specimens for shearing along fibers

Shear stiffness of notched connectors in glue laminated timber-concrete composite beams under fire conditions

Review of connections for timber-concrete composite structures under fire

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