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原文传递 Seismic Behavior of Balloon Frame CLT Shear Walls with Different Ledgers

题名：	Seismic Behavior of Balloon Frame CLT Shear Walls with Different Ledgers
正文语种：	eng
作者：	Shahnewaz, Md;Dickof, Carla;Tannert, Thomas
作者单位：	Fast Epp Vancouver BC V5Y 1M2 Canada;Fast Epp Vancouver BC V5Y 1M2 Canada;Univ Northern British Columbia Sch Engn Prince George BC V2N 4ZN Canada
关键词：	Mass-timber;Cross-laminated timber (CLT);Balloon frame;Seismic design
摘要：	This paper presents experimental investigations on the seismic behavior of cross laminated timber (CLT) shear walls in a balloon frame configuration with various ledger assemblies attached at midheight. The tested system consisted of two seven-ply 191-mm-thick CLT panels with generic hold-downs, steel angle brackets, plywood surface splines, and nails as fasteners. A 2-story system was tested with a panel aspect ratio of 3:;1 with different steel and wood ledgers under monotonic and quasistatic reversed cyclic loading. Three ledgers were subsequently tested under vertical quasistatic monotonic loading to determine their remaining load-carrying capacity. The tests showed that the shear wall displacement was due to the rocking of the wall panels, which themselves behaved as rigid bodies with negligible in-plane deformations. When compared to the monotonic tests, the strength in reversed cyclic tests was up to 21% lower. The ledger did not impede the desired rocking behavior of the wall, nor did the rocking of the wall reduce the remaining gravity load-carrying capacity of the ledgers by more than 7%. Balloon-framed CLT shear walls can be detailed and designed using the Canadian standard specifications for platform-type construction. (C) 2021 American Society of Civil Engineers.
出版年：	2021
期刊名称：	Journal of structural engineering
卷：	147
期：	9