A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Connection and System Ductility Relationship for Braced Timber Frames
Braced timber frames (BTFs) are an efficient lateral load-resisting system for wind and seismic loads. This paper derived a relationship between the connection ductility and the system ductility of concentric BTFs based on engineering principles. The system ductility is a function of the connection ductility, the stiffness ratio of the connection to the diagonal brace, and the number of tiers and story. The proposed relationship was verified against the pushover analysis results of single-story and multistory BTF buildings. The verified relationship was used to investigate the influence of connection ductility, stiffness ratio, and number of tiers and stories on the system ductility of BTFs. It is recommended, if possible, that the BTFs be designed in such a way that the connections at both ends of diagonal braces can yield simultaneously, so that a higher system ductility can be achieved. It was found that for moderately ductile BTFs according to National Building Code of Canada, the minimum brace connection ductility of 11.5 is needed when only one end connection is yielding and exhibiting significant nonlinear behavior, and the other connection remains linear elastic. If both end connections of each diagonal brace yield, the minimum connection ductility needed is 6.3. In the case of limited-ductility BTFs, the minimum connection ductility needed is 5.4 when yielding in a single connection occurs and 3.2 when yielding in both end connections occurs. The derived relationship will help researchers and engineers to predict the system ductility of BTFs with different connections.
Connection and System Ductility Relationship for Braced Timber Frames
Braced timber frames (BTFs) are an efficient lateral load-resisting system for wind and seismic loads. This paper derived a relationship between the connection ductility and the system ductility of concentric BTFs based on engineering principles. The system ductility is a function of the connection ductility, the stiffness ratio of the connection to the diagonal brace, and the number of tiers and story. The proposed relationship was verified against the pushover analysis results of single-story and multistory BTF buildings. The verified relationship was used to investigate the influence of connection ductility, stiffness ratio, and number of tiers and stories on the system ductility of BTFs. It is recommended, if possible, that the BTFs be designed in such a way that the connections at both ends of diagonal braces can yield simultaneously, so that a higher system ductility can be achieved. It was found that for moderately ductile BTFs according to National Building Code of Canada, the minimum brace connection ductility of 11.5 is needed when only one end connection is yielding and exhibiting significant nonlinear behavior, and the other connection remains linear elastic. If both end connections of each diagonal brace yield, the minimum connection ductility needed is 6.3. In the case of limited-ductility BTFs, the minimum connection ductility needed is 5.4 when yielding in a single connection occurs and 3.2 when yielding in both end connections occurs. The derived relationship will help researchers and engineers to predict the system ductility of BTFs with different connections.
Connection and System Ductility Relationship for Braced Timber Frames
Chen, Zhiyong (author) / Popovski, Marjan (author)
2020-09-19
Article (Journal)
Electronic Resource
Unknown
Seismic Performance of Braced Timber Frames
| British Library Conference Proceedings | 1996
Braced Timber Frames for Earthquake Regions
| British Library Conference Proceedings | 1998
Earthquake Resistance of Braced Timber Frames
| British Library Conference Proceedings | 1998
Ductility reduction factor for zipper-braced frames
| Taylor & Francis Verlag | 2018
Influence of connection details on seismic performance of braced timber frames
| British Library Conference Proceedings | 1998