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Displacement-Based Seismic Design and Assessment of Friction-Dissipating Light-Timber Frames Coupled with a Self-Centering CLT Wall.

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Title: Displacement-Based Seismic Design and Assessment of Friction-Dissipating Light-Timber Frames Coupled with a Self-Centering CLT Wall.
Authors: Skandalos, Konstantinos1 (AUTHOR) kostas.skandalos@gmail.com, Sextos, Anastasios2 (AUTHOR) a.sextos@bristol.ac.uk, Tesfamariam, Solomon3 (AUTHOR) solomon.tesfamariam@uwaterloo.ca
Source: Journal of Performance of Constructed Facilities. Oct2024, Vol. 38 Issue 5, p1-14. 14p.
Subjects: Earthquake resistant design, Hysteresis loop, Energy dissipation, Friction, Timber
Abstract: A dual structural system for low-to-medium-rise buildings is examined, comprising light-timber frames (LTF) coupled with a cross-laminated timber (CLT) wall. To enhance the energy-dissipating capacity of LTF featuring pinching behavior, friction sheathing-to-frame connections have been proposed in place of conventional nail connectors. The resulting friction LTFs (FLTF) exhibit sustainably rich hysteresis loops that significantly enhance energy dissipation capacity. Nevertheless, the friction-dissipating mechanism leads to nonuniform story drift distributions and residual drifts in multistory FLTF buildings. To address this issue, a CLT wall with self-centering hold-down connections is coupled to the multistory FLTF building for imposing uniform story drifts and for reducing residual drifts. A direct displacement-based design (DDBD) approach is employed to design the dual CLT-FLTF system and ensure (i.e., impose) uniform seismic demand across the height of the building. Nonlinear-time-history analysis (NTHA) and incremental dynamic analysis (IDA) show that the DDBD approach can lead to safe designs and effectively control the displacements of the proposed dual system. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:A dual structural system for low-to-medium-rise buildings is examined, comprising light-timber frames (LTF) coupled with a cross-laminated timber (CLT) wall. To enhance the energy-dissipating capacity of LTF featuring pinching behavior, friction sheathing-to-frame connections have been proposed in place of conventional nail connectors. The resulting friction LTFs (FLTF) exhibit sustainably rich hysteresis loops that significantly enhance energy dissipation capacity. Nevertheless, the friction-dissipating mechanism leads to nonuniform story drift distributions and residual drifts in multistory FLTF buildings. To address this issue, a CLT wall with self-centering hold-down connections is coupled to the multistory FLTF building for imposing uniform story drifts and for reducing residual drifts. A direct displacement-based design (DDBD) approach is employed to design the dual CLT-FLTF system and ensure (i.e., impose) uniform seismic demand across the height of the building. Nonlinear-time-history analysis (NTHA) and incremental dynamic analysis (IDA) show that the DDBD approach can lead to safe designs and effectively control the displacements of the proposed dual system. [ABSTRACT FROM AUTHOR]
ISSN:08873828
DOI:10.1061/JPCFEV.CFENG-4525