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Prototyping a passively self-centering cross-laminated timber rocking wall system: analytical and experimental investigationAuthor(s): Marco Lo Ricco; Al Ghorbanpoor; Shiling Pei; Doug Rammer; Marshall Begel; James Bridwell; Reid B. Zimmerman
Source: Wood Design Focus. 28(2): 23-39.
Publication Series: Scientific Journal (JRNL)
Station: Forest Products Laboratory
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DescriptionCross-Laminated Timber (CLT) garners international interest with increasingly taller wood structures built of robust, rigid panels. For seismic resilience of multistory platform construction, this study prototypes a CLT rocking wall system with an elliptical boundary profile. Curvilinear cuts to the load-bearing edges of a rectangular CLT panel produce smoother lateral response to earthquakes, with gravity-driven passive re-centering ability and reduced crushing damage at wall corners. Stiffness and ductility of the rocking wall can be tuned by proportioning the ellipse profile. Connections between the rocking wall and diaphragm can be designed to transfer shear and influence rocking behavior. This paper presents the design and full scale cyclic testing performance of a prototype CLT rocking wall with two different types of connections. Hysteresis plots of the test results and idealized analytical models show good agreement between design assumptions and actual properties of the pendulum rocking wall system.
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CitationLo Ricco, Marco; Ghorbanpoor, Al; Pei, Shiling; Rammer, Doug; Begel, Marshall; Bridwell, James; Zimmerman, Reid B. 2018. Prototyping a passively self-centering cross-laminated timber rocking wall system: analytical and experimental investigation. Wood Design Focus. 28(2): 23-39.
KeywordsCross-laminated timber, seismic resiliency, rocking walls, rolling inverted pendulum, slip-friction inverted pendulum
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