Theoretical Evaluation of Moment Resistance for Bolted Timber Connections

Guo, Jing; Shu, Zhan

doi:10.1051/matecconf/201930303003

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…Embedment at various angles has also been observed in other types of dowelled joints with slotted-in steel plates (Guo and Shu 2019;Shu et al 2019;Leng et al 2020;Chen et al 2022).…”

Section: Introductionmentioning

confidence: 70%

Equational Expression of Nonlinear Load-Deformation Relationship of Dowelled Joint with Slotted-In Steel Plate at Various Lateral Loading Angles Against the Grain Direction

Ogawa,

Kobayashi

2024

WFS

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When a rotational moment is applied to a dowelled joint with a slotted-in steel plate connecting the beam and the column, the lateral loads at the individual dowels are applied at various angles against the grain direction. To design the joint or analyze its rotational performance, properties at various angles are required. The main objective of this study was to create a simulation method for nonlinear load-displacement relationships at various angles of the loading direction against the grain direction. In this study, lateral loading tests of dowelled joints with slotted-in steel plates at angles of 0 , 15 , 30 , 45 , 60 , 75 , and 90 were conducted. The load-displacement relationship was measured, and the initial stiffness, proportional limit load, and yield load were obtained. When adopting Hankinson's formula for the three characteristics, the values of n were 1.951, 2.052, and 1.912, respectively. The combined use of two empirical formulas (Hankinson's formula and Foschi's formula) was attempted, and the simulation results agreed well with the experimental results, which verified the usefulness of the simulation method proposed in this study.

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“…Embedment at various angles has also been observed in other types of dowelled joints with slotted-in steel plates (Guo and Shu 2019;Shu et al 2019;Leng et al 2020;Chen et al 2022).…”

Section: Introductionmentioning

confidence: 70%

Equational Expression of Nonlinear Load-Deformation Relationship of Dowelled Joint with Slotted-In Steel Plate at Various Lateral Loading Angles Against the Grain Direction

Ogawa,

Kobayashi

2024

WFS

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“…Most of the research focussed on the fire performance of connections has investigated connections made with bolts and dowels. Theses fasteners require the pre-drilling of holes on the structural elements, and an initial gap created between the hole and the timber affecting the moment resistance of the connection [25]. Instead, STS, developed to reduce the time of installation, have the advantages of preventing wood splitting and eliminating the need for pre-drilling [17].…”

Section: Methodsmentioning

confidence: 99%

Fire Performance of Self-Tapping Screws in Tall Mass-Timber Buildings

2021

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Building elements are required to provide sufficient fire resistance based on requirements set forth in the National Building Code of Canada (NBCC). Annex B of the Canadian standard for wood engineering design (CSA O86-19) provides a design methodology to calculate the structural fire-resistance of large cross-section timber elements. However, it lacks at providing design provisions for connections. The objectives of this study are to understand the fire performance of modern mass timber fasteners such as self-tapping screws, namely to evaluate their thermo-mechanical behavior and to predict their structural fire-resistance for standard fire exposure up to 2 h, as would be required for tall buildings in Canada. The results present the great fire performance of using self-tapping screws under a long time exposure on connections in mass timber construction. The smaller heated area of the exposed surface has limited thermal conduction along the fastener’s shanks and maintained their temperature profiles relatively low for two hours of exposure. Based on the heat-affected area, the study presents new design principles to determine the residual length of penetration that would provide adequate load-capacity of the fastener under fire conditions. It also allows determining safe fire-resistance values for unprotected fasteners in mass timber construction exposed up to two hours of standard fire exposure.

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“…Авторами встановлені основні геометричні параметри зразків, які обумовлюють виникнення різних форм руйнування. В роботі [12] методом скінченних елементів досліджується характер напружено-деформованого стану болтового з'єднання дерев'яних елементів при роботі на згинальний момент. Запропонована методика створення розрахункової моделі та приведені рекомендації по призначенню характеристик матеріалу та критерії руйнування.…”

Section: аналіз останніх досліджень і публікаційunclassified

Structural Solution and Method of Calculation of Glued Laminated Timber Beam and Column Joints

Shekhorkina

Savytskyi

Kovtun-Gorbachova

2020

MEC

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The current trend in the construction industry is the development of projects of multi-storey buildings with a hybrid structural system using mainly timber load-bearing elements. The joints of load-bearing elements are criti-cal points of the frame with glued timber structures in terms of ensuring the load-bearing capacity and servicea-bility of the entire system. Existing publications in this area are mainly aimed at theoretical and experimental as-sessment of the stress-strain state of joints, while information on the construction of components for multi-storey buildings and recommendations for their design is extremely insufficient. The article presents structural solutions of the joints of glued laminated timber columns and beams, namely, hinged, which takes and transmits to the col-umn the support reaction of the beam, and rigid, which in addition to the support reaction takes the bending mo-ment. The support reaction from the beam to the column is transferred through a bolted connection and a T-shaped welded metal element. The bending moment is taken by two angles, which are fixed to the beam and welded to a vertical plate. Criteria of conformity of the proposed joints to load-bearing capacity requirements are pro-posed. The load-bearing capacity of the joint under the action of the support shear force is determined by the shear strength of the bolts in the column; the embedment strength of the metal of the T-shaped plate in the hole and bearing capacity of the bolted connection in the timber element. The action of the support bending moment requires the strength of the angles fastening to the beam and wood in the area of the bolts installation. A detailed algorithm for calculating the proposed design solutions in accordance with the requirements of the design stand-ards has been developed. Keywords: joint, glued laminated timber, beam, column, bearing capacity.

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Theoretical Evaluation of Moment Resistance for Bolted Timber Connections

Cited by 5 publications

References 8 publications

Equational Expression of Nonlinear Load-Deformation Relationship of Dowelled Joint with Slotted-In Steel Plate at Various Lateral Loading Angles Against the Grain Direction

Equational Expression of Nonlinear Load-Deformation Relationship of Dowelled Joint with Slotted-In Steel Plate at Various Lateral Loading Angles Against the Grain Direction

Fire Performance of Self-Tapping Screws in Tall Mass-Timber Buildings

Structural Solution and Method of Calculation of Glued Laminated Timber Beam and Column Joints

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