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原文传递 Full-Scale Cross-Laminated Timber Diaphragm Evaluation. Ⅰ: Design and Full-Scale Diaphragm Testing

题名：	Full-Scale Cross-Laminated Timber Diaphragm Evaluation. Ⅰ: Design and Full-Scale Diaphragm Testing
正文语种：	eng
作者：	Line, Philip;Nyseth, Scott;Waltz, Ned
作者单位：	Amer Wood Council Struct Engn 222 Catoctin Circle SE Suite 201 Leesburg VA 20175 USA;2001 NW 19th Ave STE 103A Portland OR 97209 USA;Weyerhaeuser Prod Evaluat & Performance POB 6049 Federal Way WA 98063 USA
关键词：	Cross-laminated timber (CLT);Diaphragm;Full-scale testing;Seismic;Wind;Diaphragm design;Wood;Mass timber;Screw;Spline
摘要：	The objective of this study was to monotonically test two 7.32x7.32-m (24x24-ft) cross-laminated timber (CLT) diaphragms designed using the provisions of ANSI/AWC 2021 (AWC. 2021. Special design provisions for wind and seismic. ANSI/AWC SDPWS-2021, Leesburg, VA: AWC). Each diaphragm used twelve 1.22x3.66-m (4x12-ft) CLT panels and plywood splines or glulam beams at panel shear connection locations. Diaphragms were tested in simple-span bending in general accordance with ASTM E455 (ASTM. 2017. Standard test method for static load testing of framed floor and roof diaphragm constructions for buildings. ASTM E455-2017. West Conshohocken, PA: ASTM), used 8d common [3.3x63.5-mm (0.131x2.5-in.)] nails for panel-to-panel spline connections used proprietary 7.9x200-mm (5/16x7-7/8-in.) screws for panel-to-beam connections. The calculated allowable seismic shear design capacity for both configurations, based on the panel shear connections, was 60.5 kN (13.6 kips) per reaction. The diaphragm tested with load applied parallel to the long dimension of the CLT panels failed due to spline nail withdrawal at 4.0 times the allowable seismic design capacity. The diaphragm tested in the orthogonal orientation did not fail at the safe working capacity of the steel test frame, which was 6.0 times the allowable seismic design capacity. Although this testing provided empirical verification that the SDPWS design provisions met the minimum strength target underlying the design requirements, it also identified opportunities for potential future research to reduce design conservatism. Experimental results from a series of diaphragm connection tests correlated to the connections used in the full-scale diaphragm testing are described in the Part 2 companion study (Line et al., forthcoming). (C) 2022 American Society of Civil Engineers.
出版年：	2022
期刊名称：	Journal of structural engineering
卷：	148
期：	5
页码：	04022037.1-04022037.13