Modelling of steel-timber composite connections: Validation of finite element model and parametric study

Hassanieh, A.; Valipour, Hamid; Bradford, Mark A.; Sandhaas, Carmen

doi:10.1016/j.engstruct.2017.02.016

Cited by 108 publications

(37 citation statements)

References 38 publications

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“…Finally, the third one aimed at developing accurate schematizations of the joints where the actual material properties are assigned to the elements of the models [22][23][24][25][26]. Regarding this third approach, it should be noticed that significant efforts have been devoted to develop material models capable of predicting the mechanical behaviour and the failure mechanisms of timber [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

A hysteresis model for timber joints with dowel-type fasteners

Izzi

Rinaldin

Polastri

et al. 2018

Engineering Structures

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Predicting the mechanical behaviour and the failure mechanism of timber joints with dowel-type fasteners requires consideration of several factors, including the geometrical and mechanical properties of the metal fastener, the physical properties of timber and the interaction between such elements. This paper proposes a numerical model where a joint is schematized as an elasto-plastic beam in a non-linear medium with a compression-only behaviour. Unlike the differential approach adopted by most of the hysteresis models published in literature, this model predicts the load-displacement response using simple mechanical relationships and basic input parameters. Furthermore, the model is capable of reproducing the effect of the cavity formed around the fastener by timber crushing, and simulates the hysteretic behaviour and the energy dissipation under cyclic conditions. Shear tests are reproduced on nailed steel-to-timber joints in Cross-Laminated Timber and results are compared to the experimental test data obtained on similar single fastener joints. Simulations lead to accurate predictions of both the mechanical behaviour (initial stiffness, maximum load-carrying capacity, global shape of the loading curve and of the hysteresis cycles) and the total energy dissipation observed in the tests.

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Section: Introductionmentioning

confidence: 99%

A hysteresis model for timber joints with dowel-type fasteners

Izzi

Rinaldin

Polastri

et al. 2018

Engineering Structures

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“…The result shows that the simulation can be implemented in a general model of the connection to predict the behavior of the connection after being compared by the experimental work. Hassanieh et al (2017) had carried out a validation of three-dimensional finite element model of LVL to steel connection using bolt and coach screw and found that the friction force between steel and LVL affect the peak load capacity of the connection with screw connection. Numerical simulation using threedimensional model sometimes is complicated and needs high specification hardware.…”

Section: Introductionmentioning

confidence: 99%

Study of Laminated Veneer Lumber (LVL) Sengon to Concrete Joint Using Two-Dimensional Numerical Simulation

Wusqo

Awaludin

Setiawan

et al. 2019

Journal of the Civil Engineering Forum

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The connection system is a critical part of Timber – Concrete Composite (TCC) floor structures. The behaviour of the connection needs to be known to predict the behaviour of composite structure accurately. Screws are one kind of connector that mostly used in the composite structure due to its installation ease and high withdrawal strength. This study carried out a two-dimensional numerical simulation to examine the behaviour of LVL Sengon-concrete joint using OpenSees software. The lag screw used to connect LVL Sengon and concrete. In this simulation, the screw was assumed as a beam with hinges element that supported by a set of springs representing the strength of LVL Sengon and concrete. Some input parameters for this simulation were obtained from the material test and previous research. The effect of secondary axial force was considered into the load-displacement curve resulted from the numerical simulation. This study performed several simulations towards the variation of the screw diameter, penetration depth, and concrete compressive strength. The capacity of the connections resulted from the numerical simulation were overestimates the manual calculation using EYM theory and NDS 2018 equations. The capacity of the connection increased about 146% to 284% due to the addition of secondary axial forces. In addition, this simulation can adequately predict the shear force, bending moment, and deformation of the screw. There is a plastic hinge formed in the screw after the screw being deformed a quite large. It shows the same yield mode with the manual calculation using EYM theory and NDS 2018 equations. This simulation also can show the contribution of each spring elements to resist the load until its ultimate strength.

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“…The design of the TSC beam has a considerable influence on stiffness once the shape of steel is optimized [12,13]. Although the theory of shape factors indicates that the I-shape of steel is crucial for evaluating the initial strength of the structure, the complexity of the shape factor also has a considerable effect on fire resistance [14,15].…”

Section: Introductionmentioning

confidence: 99%

Experimental Assessment of the Fire Resistance Mechanisms of Timber–Steel Composites

Tsai

2019

Materials

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Hybrid structures known as timber–steel composites (TSCs) have been extensively studied due to their potential use as alternative construction materials that can satisfy demands related to sustainability. In addition to load capacity, fire resistance is a major consideration regarding the extensive use of TSCs. In this study, 12 specimens were tested using a glulam timber material covering cold-formed steel at the center. Specifically, the TSCs were fabricated from two timber blocks and an I-shaped steel core assembled using dowels or glue as a major structure. In order to use additional timber as a fire protection layer to protect a major structure by its charcoal produced after being burned, an additional timber with 5 cm in thickness was used to cover the major structure. The 1-h fire testing of TSC following the ISO 834-1 standard was applied, in order to achieve the potential application for a 4-story timber building. The results showed that temperatures at the steel flange increased by more than 300 °C for the final 5 min in 10 out of the 12 TSC specimens, indicating that the fire protection provided by the timber structure was not sufficient. The charcoal layer surpassing the extra timber was originally set and entered the steel structure of the TSC, which was expected to retain its physical qualities after a fire. Methods for evaluating the charring properties, based on the conventional method for wood and the standard specification set by Eurocode 5, were used to assess the structural degradation of TSCs. The conventional assessments showed a divergence from the actual performance of TSCs. Such variations demonstrated the limitations of models for conventional wood in assessing the structure of a TSC. A realistic assessment was conducted to expand knowledge related to this composite under destructive processes and provide fire reference values for the practical implementation of TSCs.

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Modelling of steel-timber composite connections: Validation of finite element model and parametric study

Cited by 108 publications

References 38 publications

A hysteresis model for timber joints with dowel-type fasteners

A hysteresis model for timber joints with dowel-type fasteners

Study of Laminated Veneer Lumber (LVL) Sengon to Concrete Joint Using Two-Dimensional Numerical Simulation

Experimental Assessment of the Fire Resistance Mechanisms of Timber–Steel Composites

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