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6 records – page 1 of 1.

Experimental and Numerical Analyses of New Massive Wooden Shear-Wall Systems

https://research.thinkwood.com/en/permalink/catalogue93
Year of Publication
2014
Topic
Seismic
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Author
Pozza, Luca
Scotta, Roberto
Trutalli, Davide
Pinna, Mario
Polastri, Andrea
Bertoni, Paolo
Publisher
MDPI
Year of Publication
2014
Country of Publication
Switzerland
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Topic
Seismic
Keywords
Quasi-Static
Cyclic Loading Tests
Numerical model
Ductility
Eurocode 8
Behaviour Factor
Dissipative Capacity
Language
English
Research Status
Complete
Series
Buildings
ISSN
2075-5309
Summary
Three innovative massive wooden shear-wall systems (Cross-Laminated-Glued Wall, Cross-Laminated-Stapled Wall, Layered Wall with dovetail inserts) were tested and their structural behaviour under seismic action was assessed with numerical simulations. The wall specimens differ mainly in the method used to assemble the layers of timber boards composing them. Quasi-static cyclic loading tests were carried out and then reproduced with a non-linear numerical model calibrated on the test results to estimate the most appropriate behaviour factor for each system. Non-linear dynamic simulations of 15 artificially generated seismic shocks showed that these systems have good dissipative capacity when correctly designed and that they can be assigned to the medium ductility class of Eurocode 8. This work also shows the influence of deformations in wooden panels and base connectors on the behaviour factor and dissipative capacity of the system.
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Numerical Evaluation of Seismic Capacity of Structures with Hybrid Timber-Glass Panels

https://research.thinkwood.com/en/permalink/catalogue1745
Year of Publication
2016
Topic
Mechanical Properties
Seismic
Material
Timber-Glass Composite
Author
Barbalic, Jure
Rajcic, Vlatka
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Timber-Glass Composite
Topic
Mechanical Properties
Seismic
Keywords
Ductility
Panels
Strength
Stiffness
Energy Dissipation
Full Scale
Shaking Table Test
Eurocode 8
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4938-4946
Summary
Fulfilment of conditions given by European design codes for structures in seismic regions presents a problem during the design of new and repairing of existing structures. Although there are various options, obvious choices are solutions which provide increase of rigidity and seismic capacity with minimal increase of structural mass...
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Seismic Assessment of a Heavy-Timber Frame Structure with Ring-Doweled Moment-Resisting Connections

https://research.thinkwood.com/en/permalink/catalogue1383
Year of Publication
2018
Topic
Seismic
Connections
Material
Solid-sawn Heavy Timber
Application
Wood Building Systems
Author
Rodrigues, Leonardo
Branco, Jorge
Neves, Luís
Barbosa, André
Publisher
Springer Netherlands
Year of Publication
2018
Country of Publication
Netherlands
Format
Journal Article
Material
Solid-sawn Heavy Timber
Application
Wood Building Systems
Topic
Seismic
Connections
Keywords
Ring-Doweled Connections
Seismic Performance
Eurocode 5
Eurocode 8
Ductility
Probabilistic Approach
Q Factor
Fragility Curves
Language
English
Research Status
Complete
Series
Bulletin of Earthquake Engineering
ISSN
1573-1456
Summary
The performance of heavy-timber structures in earthquakes depends strongly on the inelastic behavior of the mechanical connections. Nevertheless, the nonlinear behavior of timber structures is only considered in the design phase indirectly through the use of an R-factor or a q-factor, which reduces the seismic elastic response spectrum. To improve the estimation of this, the seismic performance of a three-story building designed with ring-doweled moment resisting connections is analyzed here. Connections and members were designed to fulfill the seismic detailing requirements present in Eurocode 5 and Eurocode 8 for high ductility class structures. The performance of the structure is evaluated through a probabilistic approach, which accounts for uncertainties in mechanical properties of members and connections. Nonlinear static analyses and multi-record incremental dynamic analyses were performed to characterize the q-factor and develop fragility curves for different damage levels. The results indicate that the detailing requirements of Eurocode 5 and Eurocode 8 are sufficient to achieve the required performance, even though they also indicate that these requirements may be optimized to achieve more cost-effective connections and members. From the obtained fragility curves, it was verified that neglecting modeling uncertainties may lead to overestimation of the collapse capacity.
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Seismic Design of Mixed CLT/Light-Frame Multi-Storey Buildings

https://research.thinkwood.com/en/permalink/catalogue1666
Year of Publication
2016
Topic
Seismic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Shear Walls
Author
Follesa, Maurizio
Fragiacomo, Massimo
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Shear Walls
Topic
Seismic
Mechanical Properties
Keywords
Multi-Storey
Q Factor
Eurocode 8
Nonlinear Time History Analysis
Dynamic Analysis
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 3750-3759
Summary
This paper presents a study on the seismic design of hybrid multi-storey wood buildings made of CLT and Light-Frame shear walls acting at the same level. Within the framework of the force-based method, the aim of this study is to propose a simple formulation in order to establish the value of the q-factor of the hybrid system which could be also implemented in seismic design codes such as Eurocode 8. This was achieved by analysing the results of nonlinear dynamic (time-history) analyses performed on a four storey case-study building with different combinations of CLT and Light-Frame shear walls.
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Seismic Design of Multi-Storey Cross Laminated Timber Buildings According to Eurocode 8

https://research.thinkwood.com/en/permalink/catalogue392
Year of Publication
2013
Topic
Seismic
Connections
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Follesa, Maurizio
Christovasilis, Ioannis
Vassallo, Davide
Fragiacomo, Massimo
Ceccotti, Ario
Year of Publication
2013
Country of Publication
Italy
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Seismic
Connections
Keywords
Eurocode 8
Multi-Storey
Language
English
Research Status
Complete
Series
International Journal of Earthquake Engineering
Summary
Cross Laminated Timber (CLT) structures are nowadays increasingly used worldwide and mostly in Europe where the system originated. However, in spite of this diffusion which led to the construction of a great number of multi-storey buildings all over Europe, still Eurocodes are almost completely missing provisions for CLT designers, especially regarding the seismic design. Nevertheless, Eurocode 8 requires in most cases, due to the regularity criteria being not fulfilled for most of the buildings, the use of the modal response spectrum analysis method, i.e. the linear dynamic analysis. This method requires the correct estimation of the lateral stiffness of the building in order to accurately calculate the design seismic forces in the building, which may be significantly underestimated or overestimated depending on the size of the building and the shape of the design spectrum. This can be done by modelling each connection with different methods that are often based on available test results, which are not easily accessible by a practicing engineer. This paper provides a design approach for dynamic linear modelling of CLT structures using SAP 2000. Equations are proposed based on available design codes and literature references, and used to design a 3-storey case study building. Further provisions for the seismic design of CLT buildings which are not included in Eurocode 8 are also given. Finally, the proposed design model is also compared with the results of the shaking table tests conducted in 2006 in Japan by CNR-IVALSA on a three-storey CLT building.
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Seismic Design of Timber Buildings: Highlighted Challenges and Future Trends

https://research.thinkwood.com/en/permalink/catalogue2388
Year of Publication
2020
Topic
Design and Systems
Seismic
Application
Wood Building Systems
Author
Stepinac, Mislav
Šušteršic, Iztok
Gavric, Igor
Rajcic, Vlatka
Publisher
MDPI
Year of Publication
2020
Format
Journal Article
Application
Wood Building Systems
Topic
Design and Systems
Seismic
Keywords
Seismic Design
Tall Timber Buildings
Timber Composites
Seismic Retrofitting
Eurocode 8
Language
English
Research Status
Complete
Series
Applied Sciences
Summary
Use of timber as a construction material has entered a period of renaissance since the development of high-performance engineered wood products, enabling larger and taller buildings to be built. In addition, due to substantial contribution of the building sector to global energy use, greenhouse gas emissions and waste production, sustainable solutions are needed, for which timber has shown a great potential as a sustainable, resilient and renewable building alternative, not only for single family homes but also for mid-rise and high-rise buildings. Both recent technological developments in timber engineering and exponentially increased use of engineered wood products and wood composites reflect in deficiency of current timber codes and standards. This paper presents an overview of some of the current challenges and emerging trends in the field of seismic design of timber buildings. Currently existing building codes and the development of new generation of European building codes are presented. Ongoing studies on a variety topics within seismic timber engineering are presented, including tall timber and hybrid buildings, composites with timber and seismic retrofitting with timber. Crucial challenges, key research needs and opportunities are addressed and critically discussed.
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6 records – page 1 of 1.