Finite element modelling of hysteresis, degradation and failure of dowel type timber joints

Lacourt, Pablo A.; Crisafulli, Francisco J.; Mirasso, Aníbal

doi:10.1016/j.engstruct.2016.05.034

Cited by 14 publications

(4 citation statements)

References 22 publications

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“…The energy dissipation capacity of the HHTMJ is indicated by the envelope area of the hysteresis curve, and the cumulative energy dissipation (E c ) for the experiment's mortise-tenon joint is obtained by summing the hysteresis curve's area [43]. The results for the cumulative energy dissipation coefficient of the HHTMJ are depicted in Figure 17 through the calculation of the envelope area of the hysteresis curve.…”

Section: Energy Dissipation Capacity Degradationmentioning

confidence: 99%

Degradation of Mechanical Performance of Hoop Head Tenon-Mortise Joint of Tusi Manor with Decay Disease in Tibetan Areas in Yunnan

Nong,

Liu,

et al. 2024

Buildings

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(1) The Hoop Head Tenon-mortise Joint (HHTMJ) in the Tusi Manor in Tibetan areas in Yunnan, China, has a serious decay phenomenon. To understand the effect of decay on the seismic performance of HHTMJ, (2) the five groups of HHTMJ and small-size Pinus kesiya var. langbianensis wood mechanical property testing specimens were placed in an artificially set decay environment and cultivated together with wood decay fungi for 0, 6, 12, 18, and 24 weeks, respectively. Low-cycle repeated loading tests were conducted to compare the failure mode, hysteresis curve, skeleton curve, and cumulative energy consumption of the HHTMJ under different decay cycles. (3) The results indicate that the failure mode of the HHTMJ is fractured at the tenon shoulder, and the deformation and failure of the tenon increase with the increase in decay. Compared with the non-decayed specimens, the ultimate bearing performance of the specimens after 6, 12, 18, and 24 weeks of decay decreased by 8.83%, 16.97%, 19.69%, and 30.22%, respectively. The cumulative energy consumption decreased by 21.6%, 27.4%, 33.2%, and 41.3%, respectively. (4) Decay primarily occurs on the exterior of the tenon, with minimal decay on the interior. The degradation of seismic performance in HHTMJ is relatively close to the degradation observed in small-size wood specimens during mechanical property testing.

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Section: Energy Dissipation Capacity Degradationmentioning

confidence: 99%

Degradation of Mechanical Performance of Hoop Head Tenon-Mortise Joint of Tusi Manor with Decay Disease in Tibetan Areas in Yunnan

Nong,

Liu,

et al. 2024

Buildings

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“…For instance, Dong developed the DoweType generalized restoring force model [37][38][39]. Lacourt [40], Blasetti [41] and Xie [42,43] proposed the restoring force model expressed by the combination of the multi-springs, respectively. Although those simplified analytical models can effectively express the restoring force for the different mortise-tenon joints, establishing restoring force models and determining related parameters are relatively complicated.…”

Section: Introductionmentioning

confidence: 99%

The Cyclic Performance and Macro-Simplified Analytical Model of Internal Joints in RC-Assembled Frame Structures Connected by Unbonded Prestressed Strands and Mortise-Tenon Based on Numerical Studies

Wang,

Zhang,

Zhang

2024

Buildings

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This paper introduces a novel type of connection that integrates unbonded prestressed strands (UPS) and mortise-tenon in an assembly frame structure (UPS-MTF). First, the damage process and failure modes of the joints under reciprocating horizontal loads were systematically analyzed using refined numerical models. The recommended values of the design parameters of the joints were derived from the parametric analysis results. Refined numerical modeling results reveal the diagonal compression strut mechanism within the core region of the joint. The diagonal compression struts model assists in establishing the theoretical calculation formula for the skeleton curve of shear stress–strain in the core region. Second, a genetic algorithm (GA) parameter was identified for the restoring force model of the core region to determine the parameters of the hysteresis rules. Finally, a macro-simplified analytical model of the joint was created based on the restoring force model of the core region, and parameter analysis was conducted to verify the applicability of this macro-simplified analytical model. The research results prove that the damaged form of the joint proposed in this paper originates from the shear and relative slip damage between the components in the core region. The axial compression ratio significantly affects the hysteretic performance of the joints, and the upper and lower limit values were identified for the axial compression ratio of the joints. The area and initial effective stress of the UPS exert a minimal effect on the hysteretic performance of the joint. Based on the method proposed in this paper for determining the restoring force model in the core region of the joints, the hysteresis curves obtained from the macro-simplified analytical model closely match the refined numerical analysis model results. This correspondence verifies the applicability of the macro-simplified analytical model.

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“…There is an almost infinite number of possible configurations for dowel-type joints. For example, they can connect two, three or more timber [16], or even steel members [17,18]. Not only a single dowel, but also a combination of dowels can be used, in line or in a matrix distribution [19].…”

Section: Introductionmentioning

confidence: 99%

Energy Distribution in Dowel-Type Joints in Timber Structures When Using Expansive Kits

Fueyo

Cabezas

Domínguez

et al. 2021

Forests

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This paper provides a study of the mechanical energy distribution in dowel-type joints in timber structures when using expansive kits. The compression caused by the expansive kit increases the friction between the dowel and the timber’s hole, opposing the longitudinal sliding that occurs during the bending of the dowel. The ensuing rope effect increases the load capacity of the joint. The aim was to determine the advantages and disadvantages of using this kind of reinforcement. For this purpose, an ad hoc finite element model of the joint was prepared taking the contact between the different components of the joint into account and appropriately simulating the radial expansion of the dowel and the behavior of the timber. The model was checked for accuracy by comparing the results with those coming from a set of experimental tests. After that, the model was used to verify that the use of the expansive kit reinforcement leads to a slight improvement in the load capacity of the joint. This improvement is related to the frictional forces, whose effect is especially significant at low levels of joint displacement.

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Finite element modelling of hysteresis, degradation and failure of dowel type timber joints

Cited by 14 publications

References 22 publications

Degradation of Mechanical Performance of Hoop Head Tenon-Mortise Joint of Tusi Manor with Decay Disease in Tibetan Areas in Yunnan

Degradation of Mechanical Performance of Hoop Head Tenon-Mortise Joint of Tusi Manor with Decay Disease in Tibetan Areas in Yunnan

The Cyclic Performance and Macro-Simplified Analytical Model of Internal Joints in RC-Assembled Frame Structures Connected by Unbonded Prestressed Strands and Mortise-Tenon Based on Numerical Studies

Energy Distribution in Dowel-Type Joints in Timber Structures When Using Expansive Kits

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