Seismic performance of connections in heavy timber construction

2002 ◽  
Vol 29 (3) ◽  
pp. 389-399 ◽  
Author(s):  
Marjan Popovski ◽  
Helmut G.L Prion ◽  
Erol Karacabeyli
Keyword(s):  
Seismic Performance ◽  
Slenderness Ratio ◽  
Braced Frames ◽  
Cyclic Tests ◽  
Bolted Connections ◽  
Seismic Behaviour ◽  
Design Load ◽  
Timber Construction ◽  
Timber Connections ◽  
Steel Bolts

Results from monotonic and quasi-static cyclic tests on connections used in heavy timber construction are presented for two types of fasteners: steel bolts and glulam rivets. Bolted connections with three different diameter bolts, arranged in several configurations, as well as two different configurations of glulam rivet connections were tested. All configurations included a main glulam member and two steel side plates. For bolted connections, the seismic behaviour was found to be primarily dependent on the bolt slenderness ratio. Bolted connections with higher slenderness ratios (smaller diameter bolts) exhibited more ductile behaviour with considerable steel yielding and wood crushing before failure. Glulam riveted connections, which were designed in rivet failure mode, showed superior seismic performance when compared to bolted connections for similar design load levels. Riveted connections were also able to dissipate the highest amount of input energy before the failure was reached.Key words: timber connections, glulam rivets, bolts, ductility, timber, wood, braced frames, seismic performance, heavy timber construction.

Design and seismic behaviour of taller eccentrically braced frames

2010 ◽  
Vol 37 (2) ◽  
pp. 195-208 ◽  
Author(s):  
Sanda Koboevic ◽  
Simona Olivia David
Keyword(s):  
Seismic Response ◽  
Seismic Performance ◽  
Control Design ◽  
Design Criteria ◽  
Braced Frames ◽  
Local Response ◽  
Shear Forces ◽  
Seismic Behaviour ◽  
Eccentrically Braced Frames ◽  
Global And Local

This paper describes a study of the seismic behaviour of taller eccentrically braced frames (EBFs). Chevron-type EBFs with shear-critical links are designed for 14-, 20-, and 25-storey buildings in Montreal and Vancouver. For each location the importance of different design criteria is discussed and an appropriate design sequence is proposed. It was found that ductility requirements did not control design. For Vancouver, buildings member selection was mostly influenced by the inelastic inter-storey drift requirements whereas for Montreal ensuring the global frame stability was critical. The seismic response of these frames to the sets of earthquake records calibrated to match design spectra is described. The seismic performance for Vancouver frames was found to be adequate, except that in the upper storeys the inelastic link deformations and shear forces exceeded values anticipated in design. For the Montreal structures, all global and local response indicators remained well below the design limits.

scholarly journals Modal properties and seismic behaviour of buildings equipped with external dissipative pinned rocking braced frames

2018 ◽  
Vol 172 ◽  
pp. 807-819 ◽  
Author(s):  
L. Gioiella ◽  
E. Tubaldi ◽  
F. Gara ◽  
L. Dezi ◽  
A. Dall'Asta
Keyword(s):  
Braced Frames ◽  
Seismic Behaviour ◽  
Modal Properties

scholarly journals Finding the Key: Designing Timber Connections for CLT Panels

2021 ◽  
Author(s):  
◽  
Gabriella Joyce
Keyword(s):  
Large Scale ◽  
Computational Design ◽  
Digital Fabrication ◽  
Timber Construction ◽  
Structural Capacity ◽  
Connection System ◽  
Digital Modelling ◽  
Thermal Bridging ◽  
Timber Connections ◽  
Mass Timber

<p>In a climate where standard methods of construction are being challenged, developments in engineered timbers are allowing mass timber construction to be explored as a sustainable alternative to traditional building methods. Cross- laminated timber (CLT) is at the forefront of this evolution and, with the advancement in computational design and digital fabrication tools, there lies an opportunity to redefine standard construction. This project explores how digital modelling and advance digital fabrication can be combined to generate a connection system for CLT panels.  The advantages of CLT and mass timber construction are numerous and range from environmental and aesthetic benefits to site safety and cost reduction benefits. There are, however, issues that remain surrounding the connections between CLT panels. Steurer (2006, p.136) stated that, “Progress in engineered timber construction is directly related to developments in connector technology.” This thesis creates connections inspired by traditional Japanese joinery that have been adapted to be used for the panel construction of CLT structures. Using CLT offcuts as a primary connection material, the system not only reduces waste but also mitigates thermal bridging and lowers the number of connection points whilst increasing the ease of building and fabrication.  The connections are first considered at a detail scale. They use the literature review and case studies as a base for design before being tested using digitally fabricated prototypes. These prototypes are evaluated against a framework created in line with the aforementioned criteria. Within this framework, the connections are analysed against existing connection systems as well as previous designs to establish a successful system. The connections are then evaluated within the context of a building scale and considers large-scale fabrication and on- site assembly whilst continuing to focus on the reduction of waste. This research found that the simplicity of the connections is key to a successful system as this allows for faster and cheaper fabrication and installation. However, there is still further research needed surrounding large-scale fabrication and the structural capacity of timber connection systems.</p>

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