Analysis and strengthening of carpentry joints

Branco, Jorge M.; Descamps, Thierry

doi:10.1016/j.conbuildmat.2015.05.089

Cited by 72 publications

(30 citation statements)

References 8 publications

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“…Quinn et al [9] modelled traditional Peruvian timber frame walls adopting semi-rigid spring elements to model the mortise and tenon connections of the wall. The springs were calibrated based on experimental results by using the components method, which is an analytical method that allows to calculate the joint stiffness assuming a semi-rigid model taking into account all the components of the loads (normal, shear and bending) [19]. Ceccotti and Sandhaas [20] used a hysteretic law to analyse the behavior of traditional timber frame walls.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of the cyclic behavior of timber-framed structures

Lukic

Poletti

Rodrigues

et al. 2018

Engineering Structures

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The present paper presents a study on the applicability of numerical models in predicting the global response of timber-framed shear walls during earthquake events. Based on previous in-plane cyclic testing of traditional timber frames with and without masonry infill, numerical models were developed to describe the cyclic response of traditional timber frame walls including flexural behavior, pinching and strength degradation. The numerical models were developed in the finite element software OpenSees with calibrated springs representing nailed connectors found in traditional half lap joints. Based on the calibrated models a study was conducted on the timber frame wall with brick infill model by varying wall configuration and analysing cumulative energy dissipation and the effect of slenderness and load capacity with increasing drift. A good correspondence was obtained with the experimental data and future work will include the application of the model to whole buildings.

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Section: Introductionmentioning

confidence: 99%

Numerical modelling of the cyclic behavior of timber-framed structures

Lukic

Poletti

Rodrigues

et al. 2018

Engineering Structures

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“…However, this irregularity is not a severe problem, as structures with semirigid joints allow for irregular drops of the load, wherein the structure suffers partial damage and the joints are able to dissipate energy (Gattesco and Boem, 2015). Thus, a process of redistribution of loads begins after failure of a joint, which allows the wall not to collapse (Branco and Descamps, 2015) and this enables the diaphragms to support load again, until failure of the joints takes place anew and another sudden drop of load follows (Figure 4).…”

Section: Lateral Load Test 41 Test Bočnog Opterećenjamentioning

confidence: 99%

Model Calibration of Prefabricated Timber Wall Frames Made of Hieronyma Alchorneoides and Gmelina Arborea Timber Using Nail and Screw Fasteners

Leiva-Leiva¹,

Moya

Navarro-Mora

2018

Drvna ind.

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The object of this research is to develop a model for the calibration of prefabricated timber wall frames (PTWFs) with dimension of 244 by 244 cm (width by height) respectively made of Gmelina arborea Roxb. and Hieronyma alchorneoides Allemão wood and two types of fastener (nails and screws). The PTWFs were submitted to a lateral load test and the vertical and horizontal displacement, maximum load (P m), strength, stiffness values and mode of failure were determined. Results showed a greater failure percentage in the joint between the central stud and the top and bottom plates for both species and both fastener types used. PTWFs made of H. alchorneoides timber using screws showed greater values than PTWFs made of G. arborea for load at the proportionality limit and maximum load. Finally, computational model showed that the highest calibration percentage was achieved in the vertical orientation in PTWFs made using nails in both species. Meanwhile, PTWFs using screws showed calibration percentages of 58.0 and 43.5 %. The highest calibration percentage of 89.9 % was recorded in G. arborea PTWFs joined with nails, whereas the lowest calibration percentage of 69.4 % was recorded in H. alchorneoides PTWFs joined with screws.

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“…A mortise and tenon joint consists of a tongue that inserts into a mortise cut in the mating piece of timber. As one of the oldest joinery methods used in timber structures since at least 7000 years ago [1], its formation and configuration have been in a long process of trial and error [2]. Until the middle of the 20th century, the mortise and tenon joint was still designed and manufactured in terms of the experience of carpenters [3].…”

Section: Introductionmentioning

confidence: 99%

“…Efforts have been made to investigate the reinforcement of the mortise and tenon joint; however, many of them were focused on reinforcing the joints in historical structures [2,[13][14][15]. The idea of pre-reinforcement has been applied to other timber joints.…”

Section: Introductionmentioning

confidence: 99%

Mechanical performance of mortise and tenon joints pre-reinforced with slot-in bamboo scrimber plates

Gong

et al. 2019

J Wood Sci

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This study was aimed at examining the mechanical performance of mortise and tenon joints reinforced with slot-in bamboo scrimber plates. 27 full-scale specimens were manufactured with engineered wood and bamboo products using computer numerically controlled (CNC) technology, then they were tested under monotonic loading. The initial stiffness and moment carrying capacity of joints with different reinforcing configurations were obtained from the established moment-rotational angle relationships. It was found that the initial stiffness of the reinforced mortise and tenon joints increased by 11.4 to 91.8% and the moment carrying capacity increased by 13.5 to 41.7%, respectively. The total width and grain orientation of the reinforcing plates had significant influence on the mechanical performance of the mortise and tenon joints. Fastening the plates to tenon with dowels was beneficial to the mechanical performance of the joints. The embedment length and adhesive type had no significant influence to the structural performance of the joints. This study demonstrated the feasibility of pre-reinforcing mortise and tenon joints in new timber construction, and could assist to promote the application of mortise and tenon joints in modern timber structures.

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Analysis and strengthening of carpentry joints

Abstract: h i g h l i g h t sJoints play a major role in the structural behavior of old timber frames. Lack of design rules regarding the reinforcement of carpentry joints. Some calculation rules and possible strengthening techniques are presented. a b s t r a c t

Cited by 72 publications

References 8 publications

Numerical modelling of the cyclic behavior of timber-framed structures

Numerical modelling of the cyclic behavior of timber-framed structures

Model Calibration of Prefabricated Timber Wall Frames Made of Hieronyma Alchorneoides and Gmelina Arborea Timber Using Nail and Screw Fasteners

Mechanical performance of mortise and tenon joints pre-reinforced with slot-in bamboo scrimber plates

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