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contributor authorCody Beairsto
contributor authorRakesh Gupta
contributor authorThomas H. Miller
date accessioned2022-05-07T20:19:41Z
date available2022-05-07T20:19:41Z
date issued2021-12-29
identifier other(ASCE)SC.1943-5576.0000658.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4282278
description abstractMass timber is emerging in new markets for wood buildings, requiring more design knowledge to compete with other structural materials. Large, in-plane tests on cross-laminated timber (CLT) diaphragms (4,570 ×4,570  mm) were used to quantify ductility through the diaphragm force reduction factor (Rs) and m-factors from ASCE standards, and validate common design methods. Tests demonstrated that CLT can function well as a diaphragm with a mean Rs value of 1.19, comparable with precast concrete having an Rs from 0.7 to 1.4. Like precast concrete systems, CLT diaphragms depend on the interpanel connections for ductility. ASTM methods validated the assumption that a CLT diaphragm is shear-controlled for the purposes of determining Rs. ASCE m-factors are indirect measures of the nonlinear deformation capacity of a component and are multipliers on the expected strength. The m-factors observed (0.46 to 1.9 for immediate occupancy to collapse protection performance levels, respectively) were lower than those in previous studies on similar panel-to-panel connections. The initial stiffness of the large diaphragm panel-to-panel connections, 6.86  kN/mm (39.8  kip/in.), was lower than the estimate of spline stiffness of 11.5  kN/mm (65.7  kip/in.) from individual fastener tests. Hysteretic loading resulted in a lower spline stiffness of 4.37  kN/mm (24.9  kip/in.), while monotonic testing showed a mean spline stiffness of 9.04  kN/mm (52.5  kip/in.). CLT diaphragm displacement based on National Design Specification methods was conservative compared to test results in determining diaphragm flexibility.
publisherASCE
titleMonotonic and Cyclic Behavior of CLT Diaphragms
typeJournal Paper
journal volume27
journal issue2
journal titlePractice Periodical on Structural Design and Construction
identifier doi10.1061/(ASCE)SC.1943-5576.0000658
journal fristpage04021085
journal lastpage04021085-14
page14
treePractice Periodical on Structural Design and Construction:;2021:;Volume ( 027 ):;issue: 002
contenttypeFulltext


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