Discussion: Monotonic and cyclic tests of timber shear walls

The results for monotonic (ramp load) and slow cyclic racking tests of timber shear walls are presented. The tests are part of an extensive experimental and analytical study to investigate the behaviour of timber shear walls subjected to earthquakes. The results of full-size shear wall tests show the important influence of the nail connection between the sheathing and the framing on the load-displacement characteristics of shear walls. The premise that the hysteresis for the shear wall is contained within an envelope defined by the monotonic load-displacement curve for the wall is confirmed. Also, the hysteresis is studied to determine the physical behaviour that causes the shape of the hysteresis to be dependent on the maximum displacement of the wall. Both the monotonic and cyclic racking behaviours of timber shear walls are established; and the performances of plywood and waferboard sheathed shear walls are compared. Key words: full-scale monotonic and cyclic tests, plywood, waferboard, timber shear walls.

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Hyperelastic hold-down for cross-laminated timber shear walls

10.24124/2020/59102 ◽

2020 ◽

Author(s):

◽

Hosein Asgari

Keyword(s):

Experimental Studies ◽

Residual Deformation ◽

Tall Buildings ◽

Shear Walls ◽

High Strength ◽

Cyclic Tests ◽

Cross Laminated Timber ◽

High Rise ◽

Strength And Deformation ◽

Timber Shear Walls

Cross-laminated Timber (CLT) is increasingly being used in tall buildings. However, there are some challenges when designing high-rise CLT structures, amongst them the need for novel hold-downs (HD), for shear walls. While commonly used HDs behave as a dissipative connection, the current Canadian Standard for Engineering Design in Wood recommends designing HDs as a non-dissipative connection. As hyperelastic material, an elastomer (rubber) is capable to carry high loads without inelastic deformation. This thesis presents experimental studies at material- and component-levels using a hyperelastic rubber HD solution for CLT walls. A total of 53 quasi-static monotonic and cyclic tests were performed. The HDs exhibited high strength and deformation capacity without any residual deformation after unloading. The shape factor and loaded area of rubber layers were found as the main effective factors on the rubber HD’s response, and an empirical load-displacement relation was also developed based on these parameters.

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Reply: Monotonic and cyclic tests of timber shear walls

Canadian Journal of Civil Engineering ◽

10.1139/l92-110 ◽

1992 ◽

Vol 19 (5) ◽

pp. 932-933 ◽

Cited By ~ 14

Author(s):

J. D. Dolan

Keyword(s):

Shear Walls ◽

Cyclic Tests ◽

Timber Shear Walls

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Lateral performance of timber shear walls reinforced by prestressed diagonal cross bars

Annales de Chimie Science des Matériaux ◽

10.3166/acsm.42.233-243 ◽

2018 ◽

Vol 42 (2) ◽

pp. 233-243

Author(s):

HONGLIANG ZUO ◽

Y LI ◽

Jing DI ◽

NAN GUO

Keyword(s):

Shear Walls ◽

Timber Shear Walls

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Lateral resistance of mass timber shear wall connected by withdrawal-type connectors

Journal of Wood Science ◽

10.1186/s10086-021-01967-7 ◽

2021 ◽

Vol 67 (1) ◽

Author(s):

Sung-Jun Pang ◽

Kyung-Sun Ahn ◽

Seog Goo Kang ◽

Jung-Kwon Oh

Keyword(s):

Experimental Data ◽

Seismic Design ◽

Shear Walls ◽

Shear Wall ◽

Vertical Load ◽

Lateral Resistance ◽

Kinematic Models ◽

Mass Timber ◽

Timber Shear Walls ◽

Timber Shear Wall

AbstractIn this study, the lateral resistances of mass timber shear walls were investigated for seismic design. The lateral resistances were predicted by kinematic models with mechanical properties of connectors, and compared with experimental data. Four out of 7 shear wall specimens consisted of a single Ply-lam panel and withdrawal-type connectors. Three out of 7 shear wall specimens consisted of two panels made by dividing a single panel in half. The divided panels were connected by 2 or 4 connectors like a single panel before being divided. The applied vertical load was 0, 24, or 120 kN, and the number of connectors for connecting the Ply-lam wall-to-floor was 2 or 4. As a result, the tested data were 6.3 to 52.7% higher than the predicted value by kinematic models, and it means that the lateral resistance can be designed by the behavior of the connector, and the prediction will be safe. The effects of wall-to-wall connectors, wall-to-floor connectors and vertical loads on the shear wall were analyzed with the experimental data.

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