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Experimental testing of post-tensioned steel-timber hybrid frames equipped with energy-dissipating braces
https://orcid.org/0000-0002-0845-4870
Highlights A test on post-tensioned (PT) frames was conducted to examine the feasibility of using a steel-timber hybrid solution to prevent timber column compression perpendicular to the grain direction. The effects of incorporating PT steel-timber hybrid joints and added damping and stiffness (ADAS) braces into the PT timber frame were analyzed. The interaction between the ADAS brace and the PT steel-timber hybrid frame was explored.
Abstract The weak properties of wood in perpendicular-to-grain direction have imposed significant design challenges for post-tensioned (PT) timber frame structures. To resolve the challenges, the authors of this study have introduced a novel solution, the steel-timber hybrid PT frame. To further enhance its lateral performance, additional damping and stiffness (ADAS) braces were integrated into the hybrid frame. In this study, the feasibility of the combination was experimentally examined at the system level. Cyclic tests were conducted to evaluate the performance of two 2/3 scaled frame specimens: a conventional PT timber frame and a PT steel-timber hybrid frame with ADAS braces. The combination of a hybrid frame with ADAS braces showed substantial enhancements in lateral strength, initial stiffness, system ductility, and energy dissipation compared to the conventional PT timber frame. The experimental results highlighted the significant role of ADAS braces in enhancing energy dissipation, while their contribution to stiffness was less dominant. Analytical analysis further revealed an inverse relationship between the increase in ADAS contribution to lateral stiffness and the self-centering competence of the frame. A design equation was proposed to assist practitioners in achieving an optimal balance between the self-centering capacity of the PT hybrid frame and the stiffness enhancement provided by ADAS braces.
Experimental testing of post-tensioned steel-timber hybrid frames equipped with energy-dissipating braces
https://orcid.org/0000-0002-0845-4870
Highlights A test on post-tensioned (PT) frames was conducted to examine the feasibility of using a steel-timber hybrid solution to prevent timber column compression perpendicular to the grain direction. The effects of incorporating PT steel-timber hybrid joints and added damping and stiffness (ADAS) braces into the PT timber frame were analyzed. The interaction between the ADAS brace and the PT steel-timber hybrid frame was explored.
Abstract The weak properties of wood in perpendicular-to-grain direction have imposed significant design challenges for post-tensioned (PT) timber frame structures. To resolve the challenges, the authors of this study have introduced a novel solution, the steel-timber hybrid PT frame. To further enhance its lateral performance, additional damping and stiffness (ADAS) braces were integrated into the hybrid frame. In this study, the feasibility of the combination was experimentally examined at the system level. Cyclic tests were conducted to evaluate the performance of two 2/3 scaled frame specimens: a conventional PT timber frame and a PT steel-timber hybrid frame with ADAS braces. The combination of a hybrid frame with ADAS braces showed substantial enhancements in lateral strength, initial stiffness, system ductility, and energy dissipation compared to the conventional PT timber frame. The experimental results highlighted the significant role of ADAS braces in enhancing energy dissipation, while their contribution to stiffness was less dominant. Analytical analysis further revealed an inverse relationship between the increase in ADAS contribution to lateral stiffness and the self-centering competence of the frame. A design equation was proposed to assist practitioners in achieving an optimal balance between the self-centering capacity of the PT hybrid frame and the stiffness enhancement provided by ADAS braces.
Experimental testing of post-tensioned steel-timber hybrid frames equipped with energy-dissipating braces
https://orcid.org/0000-0002-0845-4870
Highlights A test on post-tensioned (PT) frames was conducted to examine the feasibility of using a steel-timber hybrid solution to prevent timber column compression perpendicular to the grain direction. The effects of incorporating PT steel-timber hybrid joints and added damping and stiffness (ADAS) braces into the PT timber frame were analyzed. The interaction between the ADAS brace and the PT steel-timber hybrid frame was explored.
Abstract The weak properties of wood in perpendicular-to-grain direction have imposed significant design challenges for post-tensioned (PT) timber frame structures. To resolve the challenges, the authors of this study have introduced a novel solution, the steel-timber hybrid PT frame. To further enhance its lateral performance, additional damping and stiffness (ADAS) braces were integrated into the hybrid frame. In this study, the feasibility of the combination was experimentally examined at the system level. Cyclic tests were conducted to evaluate the performance of two 2/3 scaled frame specimens: a conventional PT timber frame and a PT steel-timber hybrid frame with ADAS braces. The combination of a hybrid frame with ADAS braces showed substantial enhancements in lateral strength, initial stiffness, system ductility, and energy dissipation compared to the conventional PT timber frame. The experimental results highlighted the significant role of ADAS braces in enhancing energy dissipation, while their contribution to stiffness was less dominant. Analytical analysis further revealed an inverse relationship between the increase in ADAS contribution to lateral stiffness and the self-centering competence of the frame. A design equation was proposed to assist practitioners in achieving an optimal balance between the self-centering capacity of the PT hybrid frame and the stiffness enhancement provided by ADAS braces.
Experimental testing of post-tensioned steel-timber hybrid frames equipped with energy-dissipating braces
Chen, Fei (author) / Li, Zheng (author) / Li, Minghao (author) / Shu, Zhan (author)
Engineering Structures ; 296
2023-09-23
Article (Journal)
Electronic Resource
English
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