A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic performance evaluation of self-centering balloon-framed CLT building
https://orcid.org/0000-0002-6015-0110
https://orcid.org/0000-0002-3814-8508
https://orcid.org/0000-0002-7484-8691
https://orcid.org/0000-0001-9699-2750
Highlights The first CLT building in North America adopting self-centering HD was investigated. An advanced 3D numerical model of the building was developed in OpenSees. Building with the novel HD showed higher resilience than that with traditional HD.
Abstract Balloon-framed cross-laminated timber (CLT) construction has a number of advantages when compared to platform-type construction; however, many international standards only include provisions for the latter as there is little research reported on the seismic performance of the former. In this paper, a seismic fragility assessment of a 4-storey balloon-framed CLT building in Vancouver, Canada, is presented. This structure is the first in North America that adopts a self-centering friction-based technology for the hold-downs (HDs). The seismic performance of the building was assessed by performing incremental dynamic analysis (IDA) on a three-dimensional finite element model using Cascadia Subduction Zone ground motions, and compared to a second building model with conventional dowel-type HDs. The analyses at the design intensity level showed that the self-centering building had an average maximum inter-story drift ratio of 0.67%, well below the 2.5% drift limit specified in the National Building Code of Canada. Based on the IDA and taking into account uncertainties, the building had a collapse margin ratio of 2.96 and a 5.2% probability of collapse at the design level. Compared to the conventional HDs, the friction-based HDs did not improve the building’s collapse capacity, but reduced the building drift by more than 20% at lower damage states, demonstrating the effectiveness of designing balloon-framed CLT structures with a resilient self-centering HDs in high seismic zones.
Seismic performance evaluation of self-centering balloon-framed CLT building
https://orcid.org/0000-0002-6015-0110
https://orcid.org/0000-0002-3814-8508
https://orcid.org/0000-0002-7484-8691
https://orcid.org/0000-0001-9699-2750
Highlights The first CLT building in North America adopting self-centering HD was investigated. An advanced 3D numerical model of the building was developed in OpenSees. Building with the novel HD showed higher resilience than that with traditional HD.
Abstract Balloon-framed cross-laminated timber (CLT) construction has a number of advantages when compared to platform-type construction; however, many international standards only include provisions for the latter as there is little research reported on the seismic performance of the former. In this paper, a seismic fragility assessment of a 4-storey balloon-framed CLT building in Vancouver, Canada, is presented. This structure is the first in North America that adopts a self-centering friction-based technology for the hold-downs (HDs). The seismic performance of the building was assessed by performing incremental dynamic analysis (IDA) on a three-dimensional finite element model using Cascadia Subduction Zone ground motions, and compared to a second building model with conventional dowel-type HDs. The analyses at the design intensity level showed that the self-centering building had an average maximum inter-story drift ratio of 0.67%, well below the 2.5% drift limit specified in the National Building Code of Canada. Based on the IDA and taking into account uncertainties, the building had a collapse margin ratio of 2.96 and a 5.2% probability of collapse at the design level. Compared to the conventional HDs, the friction-based HDs did not improve the building’s collapse capacity, but reduced the building drift by more than 20% at lower damage states, demonstrating the effectiveness of designing balloon-framed CLT structures with a resilient self-centering HDs in high seismic zones.
Seismic performance evaluation of self-centering balloon-framed CLT building
https://orcid.org/0000-0002-6015-0110
https://orcid.org/0000-0002-3814-8508
https://orcid.org/0000-0002-7484-8691
https://orcid.org/0000-0001-9699-2750
Highlights The first CLT building in North America adopting self-centering HD was investigated. An advanced 3D numerical model of the building was developed in OpenSees. Building with the novel HD showed higher resilience than that with traditional HD.
Abstract Balloon-framed cross-laminated timber (CLT) construction has a number of advantages when compared to platform-type construction; however, many international standards only include provisions for the latter as there is little research reported on the seismic performance of the former. In this paper, a seismic fragility assessment of a 4-storey balloon-framed CLT building in Vancouver, Canada, is presented. This structure is the first in North America that adopts a self-centering friction-based technology for the hold-downs (HDs). The seismic performance of the building was assessed by performing incremental dynamic analysis (IDA) on a three-dimensional finite element model using Cascadia Subduction Zone ground motions, and compared to a second building model with conventional dowel-type HDs. The analyses at the design intensity level showed that the self-centering building had an average maximum inter-story drift ratio of 0.67%, well below the 2.5% drift limit specified in the National Building Code of Canada. Based on the IDA and taking into account uncertainties, the building had a collapse margin ratio of 2.96 and a 5.2% probability of collapse at the design level. Compared to the conventional HDs, the friction-based HDs did not improve the building’s collapse capacity, but reduced the building drift by more than 20% at lower damage states, demonstrating the effectiveness of designing balloon-framed CLT structures with a resilient self-centering HDs in high seismic zones.
Seismic performance evaluation of self-centering balloon-framed CLT building
Pan, Yuxin (author) / Shahnewaz, Md (author) / Dickof, Carla (author) / Tannert, Thomas (author)
Engineering Structures ; 294
2023-08-25
Article (Journal)
Electronic Resource
English
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