Seismic performance evaluation of innovative balloon type CLT rocking shear walls

Yang, T.Y.; Lepine-Lacroix, S.; Guerrero, J.A. Ramos; McFadden, Jasmine Bing-Wang; Al‐Janabi, Musab Aied Qissab

doi:10.1016/j.rcns.2022.03.004

Cited by 24 publications

(3 citation statements)

References 21 publications

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“…This scale factor value might be compared with the scale factor proposed in the literature. For example, CCMC/NRC guide (NRC, 2021) suggests the scale factor of 2.0 within their performance evaluation methodology developed and assessed on cross-laminated timber shear wall systems (Yang et al, 2022).…”

Section: Detailed Screening Process Using Nlthamentioning

confidence: 99%

“…This approach only demonstrates if the adjusted collapse margin ratios (ACMRs) of the archetypes are larger than the acceptable ACMR (which is equal to 1.9 assuming a 10% probability of collapse and a total system uncertainty of 0.5), while the exact ACMR for each archetype is not calculated. The CCMC/NRC approach has been recently applied on the assessment of two balloon-type 12-story CLT shear wall archetypes (Yang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Methodology for determination of seismic force modification factors in Canada: Performance-based unified procedure

et al. 2023

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The National Building Code of Canada (NBC) employs seismic force modification factors (i.e. ductility-related factor, Rd, and an overstrength-related factor, Ro) for different Seismic Force Resisting Systems (SFRSs), which, since 2005, are largely based on engineering judgment and qualitative comparisons of seismic response characteristics of different SFRSs. Currently, there is no unified procedure in Canada for systematically quantifying these values, which has potentially led to perceived inconsistent levels of performance between buildings built with different SFRSs. While some research has been carried out in Canada to quantitatively evaluate the seismic response of different SFRSs using the FEMA P695 methodology with some modifications, inconsistencies exist among different research works. Moreover, the number of archetypes developed in these studies was limited, due to the computationally laborious incremental dynamic analysis (IDA) step in FEMA P695. Therefore, there is a need for a consistent and efficient methodology for structural performance assessment of different SFRSs in Canada. The proposed performance-based unified (PBU) procedure is to systematically quantify Rd and Ro factors for different SFRSs in the NBC. The PBU procedure is designed to be a performance-based approach (vs the risk-based approach of FEMA P695). In addition, our procedure is devised to optimize the number of archetypes through a two-level screening procedure using a nonlinear pushover and time history analyses before running the IDA. To validate the PBU procedure, we developed 21 different concrete moment frame archetypes covering various key parameters. The results verify the efficiency of the screening feature of the PBU procedure by a significant reduction in the number of archetypes requiring IDA.

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Section: Detailed Screening Process Using Nlthamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Methodology for determination of seismic force modification factors in Canada: Performance-based unified procedure

et al. 2023

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“…Self-centering systems with flag-shaped hysteresis play a critical role in earthquake resilience as they are proportioned to nearly eliminate residual drifts and improve structural repairability after earthquakes (Li and Wang, 2022;Thonstad et al, 2017Thonstad et al, , 2021Xiao et al, 2022aXiao et al, , 2022bYang et al, 2022;Zhong and Christopoulos, 2022). Several area-based equations have been proposed to estimate EDR for self-centering systems (Blandon and Priestley, 2005;Gulkan and Sozen, 1974;Jacobsen, 1930;Marriott, 2009;Priestley et al, 2007), but the assumption of harmonic excitation in the area-based strategy leads to overestimated EDR (Twigden, 2016), and no correlation factor has yet been established specifically for flag-shaped hysteresis systems.…”

Section: Introductionmentioning

confidence: 99%

An equivalent damping ratio that accounts for ground-motion spectral shape for displacement-based design of flag-shaped hysteresis systems

et al. 2023

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Direct displacement–based design (DDBD) methodologies simplify the estimation of the seismic deformation demands of a nonlinear system by replacing it with an equivalent linear system that is characterized by an effective stiffness and equivalent damping ratio (EDR). The calculated EDR for flag-shaped hysteresis relationships vary greatly among existing DDBD methodologies, and these methodologies display a strong bias according to the shape of the ground-motion response spectrum. In the work reported here, the limitations of existing methods are demonstrated for three sets of ground-motions: a set of far-field ground-motions, a set of near-field ground-motions, and a set of physics-based simulated ground-motions that account for the effects of a deep sedimentary basin. The effect of spectral shape can be quantified by a new measure of spectral shape that is based on the spectral displacement ordinates between the system’s initial and equivalent periods. To address the limitations of existing methodologies, a new equation for calculating EDR was developed based on numerous nonlinear history analyses for all three sets of ground-motions and for a wide range of systems with flag-shaped hysteresis. In comparison with existing equations, the proposed equation for calculating EDR improves the accuracy of the DDBD methodology by lowering the bias and dispersion of the ratio between the displacement calculated by nonlinear analysis and the displacement calculated with the equivalent linear system. The usage of the new EDR equation in DDBD requires iteration, but neither numerical modeling nor analysis is needed. Specific steps of the application are demonstrated for a system with a flag-shaped hysteresis.

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Hysteretic Model of Frictional Steel Truss Coupling Beams

Cui,

Tang,

Wang

2024

Lecture Notes in Civil Engineering

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Seismic performance evaluation of innovative balloon type CLT rocking shear walls

Cited by 24 publications

References 21 publications

Methodology for determination of seismic force modification factors in Canada: Performance-based unified procedure

Methodology for determination of seismic force modification factors in Canada: Performance-based unified procedure

An equivalent damping ratio that accounts for ground-motion spectral shape for displacement-based design of flag-shaped hysteresis systems

Hysteretic Model of Frictional Steel Truss Coupling Beams

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