Experimental investigations of a new highly ductile hold-down with adaptive stiffness for timber seismic bracing walls

Maitre, Kylian; Lestuzzi, Pierino; Geiser, Martin (2023). Experimental investigations of a new highly ductile hold-down with adaptive stiffness for timber seismic bracing walls Bulletin of Earthquake Engineering, 21(5), pp. 2603-2634. Springer Netherlands 10.1007/s10518-022-01607-5

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An efficient implementation of the capacity design requires high ductility combined with a low overstrength of the critical regions. Conventional timber connections do not generally offer such ideal combination, resulting in modest behaviour and relatively high overstrength factors. Inspired by the Buckling Restrained Brace a new hold-down has been developed where the timber wall directly acts as a casing. The new hold-down has been given an adaptive stiffness allowing the structure to be stiff in the wind, while becoming more flexible in the case of an earthquake. Furthermore, local crushing of the timber members is completely avoided, and the new hold-down could be replaced after an earthquake. Experimental investigations were performed on hold-down specimens. The results show ultimate displacement values vu,c of more than 30 mm in a cyclic test according to EN12512. Eleven Cross Laminated Timber shear walls, in which the new hold-down has been implemented, were tested following monotonic and static-cyclic tests procedures, with and without vertical load. A very high ductility has been achieved with almost no strength degradation, little pinching and limited overstrength.

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Architecture, Wood and Civil Engineering School of Architecture, Wood and Civil Engineering > Institute for Timber Construction, Structures and Architecture School of Architecture, Wood and Civil Engineering > Institute for Timber Construction, Structures and Architecture > Earthquake Engineering School of Architecture, Wood and Civil Engineering > Institute for Timber Construction, Structures and Architecture > Timber Construction BFH Centres and strategic thematic fields > BFH Centre for Wood - Resource and Material
Name:	Maitre, Kylian; Lestuzzi, Pierino and Geiser, Martin
Subjects:	T Technology > TH Building construction
ISSN:	1570-761X
Publisher:	Springer Netherlands
Language:	English
Submitter:	Corinne Amstutz Hugi
Date Deposited:	08 Mar 2023 09:58
Last Modified:	28 Mar 2023 01:30
Publisher DOI:	10.1007/s10518-022-01607-5
ARBOR DOI:	10.24451/arbor.18918
URI:	https://arbor.bfh.ch/id/eprint/18918