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Seismic Design of Timber Steel Hybrid High-Rise Buildings

https://research.thinkwood.com/en/permalink/catalogue1270
Year of Publication
2017
Topic
Seismic
Connections
Application
Hybrid Building Systems
Author
Zhang, Xiaoyue
Organization
University of British Columbia
Year of Publication
2017
Format
Thesis
Application
Hybrid Building Systems
Topic
Seismic
Connections
Keywords
Timber-Steel Hybrid
FFTT
Seismic Performance
Strength
Stiffness
Ductility
Failure Mechanisms
Force Reduction Factors
High-Rise
Research Status
Complete
Summary
Timber-steel hybrid systems utilize timber as main construction material, but also take advantage of the ductility and stiffness that steel provides. For a novel hybrid system to gain recognition, experimental data must be supported by numerical analysis to predict its structural performance. “Finding the Forest Through the Trees” (FFTT) is one proposal for a timber-steel hybrid system using mass-timber panels as shear walls and floor slabs connected with steel header beams. This thesis presents research to evaluate the seismic performance of the FFTT hybrid system using experimental methods, numerical modeling, and reliability analysis. The FFTT system was investigated on two levels: i) component design, and ii) system design. On the component level, the strength, stiffness, ductility, and failure mechanisms of the two key connections were evaluated experimentally. CLT (Cross Laminated Timber) wall to steel beam connection tests results demonstrated that appropriate connection layouts can lead to the desired failure mechanism while avoiding crushing of the mass-timber panels. For the hold-down connection, a modified HSK (Holz-Stahl-Komposit) assembly with high force and stiffness capacity together with ductile behaviour was proposed. On the system level, the seismic response of the FFTT system with different ductility values was investigated using nonlinear 2D and 3D models subjected to a number of ground motion acceleration records. The seismic reliability with various uncertainties was analysed in order to investigate the FFTT system from a performance based approach. Based on the results, an appropriate seismic force reduction factor specific to the FFTT system was proposed. Finally, a feasibility study confirmed the possibility of the practical application of this system. This thesis can serve as a precursor for developing design guidelines for tall wood-hybrid building systems in seismic regions.
Online Access
Free
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Thermo-Mechanical Behavior of Timber in Shear: An Experimental Study

https://research.thinkwood.com/en/permalink/catalogue505
Year of Publication
2014
Topic
Fire
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Author
Audebert, Maxime
Dhima, Dhionis
Bouchaïr, Abdelhamid
Racher, Patrick
Year of Publication
2014
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Topic
Fire
Mechanical Properties
Keywords
Shear Strength
Temperature
Reduction Factors
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The advanced calculation methods for wood structural elements in fire situations proposed by EN1995-1-2 provide reduction factors of wood strength according to the temperature. The values of these reduction factors given for compression and tension strength are relatively well documented. However, the reduction factors of wood shear strength with temperature were not studied. This study concerns experimental investigations conducted to characterize the evolution with temperature of the shear strength of wood. The tests are realized using a specific original specimen specially developed for this study. The experimental results allow evaluating the values given in EN1995-1-2.
Online Access
Free
Resource Link
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