Friction-Based Connectors for Timber Shear Walls: Static Experimental Tests

Wakashima, Yoshiaki; Shimizu, Hiromasa; Ishikawa, Keisuke; Fujisawa, Yasushi; Tesfamariam, Solomon

doi:10.1061/(asce)ae.1943-5568.0000351

Cited by 14 publications

(4 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…( 6) and ( 7), respectively, and ΔF 1,2 and ΔF 2,3 can be calculated from Eqs. ( 8) and ( 9), respectively: (6) Therefore, the axial force ratio α of bolt 1 in Fig. 6b, c can be calculated from Eqs.…”

Section: Calculation Of Axial Bolt Force Ratio Under Elastic Interactionmentioning

confidence: 99%

“…However, recent research has reported that, when bolts are tightened to reach the plastic region of wood and are tightened in the direction of the grain of wood and wood-based materials, a high axial force is maintained over a long period of time, even if subjected to the effects of repeated drying and wetting [4,5]. Research and development regarding wood friction connectors and prestressed timber joints that utilize this axial force is currently underway and the authors have reported on the high seismic performance of bearing walls incorporating wood friction connectors and the joint performance of prestressed timber joints [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Elastic interaction in multiple bolted timber joints

2022

Self Cite

View full text Add to dashboard Cite

The management of axial forces is an important issue when a joining method that takes into account the axial forces generated by tightening bolts is applied to the bolted joints of a wooden structure during construction. This study focuses on elastic interactions in which the axial force of adjacent bolts changes as a result of sequential tightening of each bolt in multiple bolted joints affecting the deformation around each of the other bolts. To this end, tightening experiments are conducted within the elastic range, with the tightening sequence, bolt spacing, and wood thickness set as parameters. From the results, it was found that variations in axial force tended to decrease as bolt spacing increases. In addition, an evaluation formula for calculating fluctuations in axial force due to elastic interactions was derived. By comparing the calculated value to the experimental value, it was found that as bolt spacing was increased, the calculated value tended to capture the experimental values well.

show abstract

Section: Calculation Of Axial Bolt Force Ratio Under Elastic Interactionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Elastic interaction in multiple bolted timber joints

2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…This solution does not eliminate pinching but enhances the structural dissipation sources. Other scholars attempted to eliminate pinching by developing pinching-free connections [27][28][29][30][31][32][33]. This solution improves the cyclic behaviour signi cantly, as demonstrated from multiple experimental tests [34][35][36]: the mutual sliding between metal plates with interposed shim material guarantees an almost Coulomb-like dissipation.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear SDOF Analytical Model of Mass-Timber Building with Post-Tensioned Rocking Walls

Aloisio

Rosso

Huang

et al. 2022

Preprint

View full text Add to dashboard Cite

The dynamic response of post-tensioned rocking walls in a mass timber building can be reduced to a single-degree-of-freedom (SDOF) model. In this model, the rocking wall panel is simplified as a rigid block, while the base rotation represents the degree of freedom of the entire structure. The paper presents an analytical approach to develop and calibrate this nonlinear model using shake table tests of a full-scale two-story building with CLT rocking walls. The experimental data are used to estimate the parameters of the governing equation using least-squares optimization. The correlation between the obtained parameters and the cumulative dissipated energy led to a nonlinear model with degradation behavior captured. After that, the calibrated model was used to assess the fragility functions of the structure under repetitive seismic events.

show abstract

“…The authors have long been interested in developing load-bearing walls, which leverage the friction created when wooden members are fastened together (or to steel plate) with bolts or lag screws. Our team has already reported on the structural performance of these joints [9][10][11], how to control the initial tightening force [12][13][14][15], and their long-term stress relaxation behavior [16][17][18]. In the last case, we have shown that these joints can withstand relatively high stress when the initial tightening force exceeds the compressive yield point of the wood, even when exposed to repeated wetdry cycles [18]; and that they can withstand at least 70% of any vertical compressive stress applied to the wood, even in a high-temperature, constant-humidity environment [17].…”

Section: Introductionmentioning

confidence: 99%

The load factor in bolted timber joints under external tensile loads

et al. 2020

Self Cite

View full text Add to dashboard Cite

These experiments sought to empirically determine how the initial tightening force influences the ratio of the axial bolt force to the tensile load (load factor) and the load required to separate the joint interface (interface separation load) in tensile bolted joints of glued laminated timber. Load factor decreases with increasing initial tightening force; however, this tendency is reduced the greater the washer-member-end distance. In addition, tensile stiffness increases with decreasing load factor, and the interface separation load increases with increasing initial tightening force. However, in actual testing, the joint interface separated at a lower load that predicted mathematically based on the load factor and initial tightening force.

show abstract

Friction-Based Connectors for Timber Shear Walls: Static Experimental Tests

Cited by 14 publications

References 28 publications

Elastic interaction in multiple bolted timber joints

Elastic interaction in multiple bolted timber joints

Nonlinear SDOF Analytical Model of Mass-Timber Building with Post-Tensioned Rocking Walls

The load factor in bolted timber joints under external tensile loads

Contact Info

Product

Resources

About