Performance‐based design of tall‐coupled cross‐laminated timber wall building

Abstract

Growing demand in sustainable high‐rise timber structures is satisfied by proposing innovative structural systems that enhance the building's stiffness, strength, and energy‐dissipation capacity. This study propose and develop the performance‐based design (PBD) guideline for balloon type cross‐laminated timber (CLT) coupled wall (CLT‐CW) structure. In this system, the CLT shear‐walls are connected with energy dissipation coupling beams that comprise shear‐links and in return reduce the seismic demand of the system. To facilitate the desired rocking deformation mode of CLT shear‐wall panels, buckling‐restrained brace (BRB) hold‐downs are used. Utility of the proposed system and design is applied on a 20‐story balloon CLT‐CW system. To investigate the effect of coupling ratio (CR$CR$) on the behavior of the system, five CR$CR$ values (10%–50%) are used. Nonlinear and incremental dynamic analyses (IDAs) are performed using suitable set of 30 ground motion (GM) records that reflects the seismicity of Vancouver, Canada. Fragility curves are developed and compared considering both the collapse and non‐collapse limit states. The results show that, for a given CLT‐CW system, a system with higher CR$CR$ value exhibits better seismic performance.

Seismic loss and resilience assessment of tall-coupled cross-laminated timber wall building

“…The 2020 National Building Code of Canada (NBC, 2020) and the 2021 International Building Code (Breneman and Richardson, 2019) have increased the mass-timber building heights to 12 and 18 stories, respectively. Tesfamariam et al (2021a), and Teweldebrhan and Tesfamariam (2022) have recently proposed and designed novel 20-story CLT coupledwall (CLT-CW) building system. With increase in building height, the need to assess the continuous operation of the system and reduce economic losses under strong earthquake ground shaking becomes a critical design consideration (Di Cesare et al, 2020;Tesfamariam, 2022;Wilson et al, 2021).…”

“…Using the FEMA P-58 procedure, this study presents intensity- and time-based loss assessments to estimate seismic loss and resilience of a 20-story CLT-CW system reported in literature (Tesfamariam et al, 2021a; Teweldebrhan and Tesfamariam, 2022). The system examined in this article was designed considering a coupling ratio ( CR ) of 30% and seismic modification factor ( R o R d ) of 3.…”

Seismic collapse risk of RC-timber hybrid building with consideration of NBCC 2020 seismic hazard model

“…Sustainable building systems are fast becoming a necessity due to environmental concerns associated with rapid population growth in urban areas [1]. In an attempt to solve this problem, several non-traditional [2] and hybrid structural systems [1,3] have been investigated. Concrete, and eventually steel over the past couple of decades, have been the materials of choice for construction of civil engineering structures.…”

Seismic collapse risk of RC-timber hybrid building with different energy dissipation connections considering NBCC 2020 hazard

“…Aside from being used as a stand-alone material for building structural systems as permitted by the various design codes, several hybrid-structural systems using timber have been investigated, e.g. [ 3 – 9 ].…”

“…Aside from being used as a stand-alone material for building structural systems as permitted by the various design codes, several hybrid-structural systems using timber have been investigated, e.g. [3][4][5][6][7][8][9]. relationships are developed for a large number of numerical models using an area-based approach.…”