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Title: Determination of seismic performance factors for CLT shear wall systems

Author: Amini, M. Omar; van de Lindt, John W.; Rammer, Douglas; Pei, Shiling; Line, Philip; Popovski, Marjan;

Date: 2016

Source: WCTE 2016, World conference on Timber Engineering, August 22-25, 2016, Vienna, Austria.

Publication Series: Paper (invited, offered, keynote)

Description: This paper presents selected results of connector testing and wall testing which were part of a Forest Products Lab-funded project undertaken at Colorado State University in an effort to determine seismic performance factors for cross laminated timber (CLT) shear walls in the United States. Archetype development, which is required as part of the process, is also discussed. Connector tests were performed on generic angle brackets which were tested under shear and uplift and performed as expected with consistent nail withdrawal observed. Quasi-static cyclic tests were conducted on CLT shear walls to systematically investigate the effects of various parameters. Boundary constraints and gravity loading were both found to have a beneficial effect on the wall performance, i.e. higher strength and deformation capacity. Specific gravity also had a significant effect on wall behaviour while CLT thickness was less influential. Higher aspect ratio panels (4:1) demonstrated lower stiffness and substantially larger deformation capacity compared to moderate aspect ratio panels (2:1). However, based on the test results there is likely a lower bound of 2:1 for aspect ratio where it ceases to have any beneficial effect on wall behaviour. This is likely due to the transition from the dominant rocking behaviour to sliding behaviour.

Keywords: Cross-laminated timber (CLT), seismic performance factors, FEMA P695 methodology, ASCE7

Publication Notes:

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Amini, M. Omar; van de Lindt, John W.; Rammer, Douglas; Pei, Shiling; Line, Philip; Popovski, Marjan 2016. Determination of seismic performance factors for CLT shear wall systems. In: World conference on Timber Engineering, WCTE 2016. 22-25 August 2016, Vienna, Austria. 8 pp.


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