RECENT DEVELOPMENT IN CLT CONNECTIONS PART II: IN-PLANE SHEAR CONNECTIONS FOR CLT BRACING ELEMENTS UNDER CYCLIC LOADS
Keywords:
Cross-laminated Timber, CLT, Ductile and dissipative in-plane shear connection, Wall and floor diaphragms, Bracing elements, Shear wallsAbstract
Because of their high shear strength and stiffness, cross-laminated timber (CLT) members are especially suited for in-plane loads. However, the ductility and energy dissipation capacity of a CLT structure is mainly determined by properties of the mechanical connections such as dowel-type fasteners. Unfortunately, the load-slip behavior of these typical timber-to-timber connections shows pinched hysteresis loops and impairment of strength. For seismic loads, highly dissipative connections with stable dissipation properties are desirable. A new type of connection was developed avoiding the pinching of hysteresis loops while showing high energy dissipation. An experimental investigation and a design proposal of a highly dissipative steel plate connection for CLT shear walls is presented as a result of the work.
References
Ceccotti A (1995) Timber connections under seismic actions.
STEP lecture C17, Timber Engineering STEP 1, Centrum
Hout, Almere, The Netherlands.
Dimitrov N, Pocanschi A (1985) Wandscheiben mit dynamischer Anpassungsfahigkeit fur Bauten in Erdbebengebieten. Bauingenieur 60:91-98.
Iqbal A, Pampanin S, Buchanan A (2007) Improved seismic
performance of LVL post-tensioned walls coupled with
UFP devices. 8th Pacific Conference on Earthquake Engineering, December 5-7, 2007, Singapore.
Johansen KW (1949) Theory of timber connections. IABSE
:249-262.
Kelly JM, Skinner RI, Heine AJ (1972) Mechanisms of
energy absorption in special devices for use in earthquake
resistant structures. Bulletin of the New Zealand Society
for Earthquake Engineering 5(3).
Pocanschi A, Phocas MC (2003) Kr¨afte in Bewegung - Die
Techniken des erdbebensicheren Bauens. Teubner Verlag,
Stuttgart, Leipzig, Wiesbaden.
Sadowski AJ, Rotter JM, Reinke T, Ummenhofer T
(2015) Statistical analysis of the material properties
of selected structural carbon steels. Struct Saf 53:
-35.
Schmidt T (2016) Kontaktverbindungen zur Langsschub
ubertragung in den Schmalseiten von Brettsperrholzelementen. Doktorandenkolloquium Holzbau
“Forschung und Praxis.” Stuttgart, 1.-2.03.2016.
Universitat Stuttgart.
