Nonlinear seismic performance of Y-type self-centering steel eccentrically braced frame buildings

Keivan, Ashkan; Zhang, Yunfeng

doi:10.1016/j.engstruct.2018.11.002

Cited by 33 publications

(8 citation statements)

References 22 publications

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“…The overall load-displacement behavior of an SCEBF-SRL with RHD devices and frictional contacts (Figure 7(B)) can be obtained by adding the effect of friction force to the hysteretic behavior of an SCEBF-SRL with RHD devices. The system strength and the post-yielding stiffness of the system with combined energy dissipation mechanisms can be calculated using Equations ( 19) and (20).…”

Section: Effect Of Friction Forcementioning

confidence: 99%

“…Erochko et al 18 investigated the nonlinear behavior of a multistory self-centering energy dissipative brace frame by conducting experimental tests and numerical simulations. Keivan and Zhang 19,20 studied the nonlinear seismic performance of different configurations of self-centering eccentrically braced frame (SCEBF) systems (D-, K-, and Y-type). They reported that SCEBF buildings can be designed to have stiffness and ductility equal to the CEBFs.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear seismic performance study of D‐type self‐centering eccentric braced frames with sliding rocking link beams

Rezvan

Zhang

2021

Earthq Engng Struct Dyn

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This paper presents a nonlinear numerical simulation study of the D-type self-centering eccentric braced frame system with a sliding rocking link beam (SCEBF-SRL) to overcome the beam-growth problem. The re-centering capability of such SCEBF-SRLs is enabled by post-tensioned (PT) steel-stranded cables. Replaceable hysteretic dampers termed RHD are used as seismic fuse devices for energy dissipation, while the friction force due to the relative movement of the sliding rocking link beam inside the column corbels would also contribute to the energy dissipation capacity of the system. Analytical load versus displacement relationships of an SCEBF-SRL module frame were formulated and crossvalidated with nonlinear finite element (FE) analysis results. The seismic performance of the proposed system was studied through nonlinear static and dynamic analysis of three-and six-story prototype SCEBF-SRL buildings. A set of twentytwo far-field ground motions from the FEMA P695 database was adopted for nonlinear dynamic analysis (NDA). NDA results revealed that the ensemble median of the maximum inter-story drift ratios (IDRs) of both SCEBF-SRL prototypes were less than 1.4% and 2.0% at the design basis earthquake (DBE) and the risktargeted maximum considered earthquake (MCE R ) levels, respectively. Additionally, both SCEBF-SRL buildings fully re-centered themselves at MCE R with negligibly small residual drift (<0.01%). The parametric study results suggest that with an energy dissipation ratio, 𝛽 𝐸 between 25% and 60% and a minimum stiffness ratio of 5%, the ensemble median of the maximum IDR of the considered prototype building could be made less than 1.5% and 2.3% at DBE and MCE R levels, respectively.

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Section: Effect Of Friction Forcementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nonlinear seismic performance study of D‐type self‐centering eccentric braced frames with sliding rocking link beams

Rezvan

Zhang

2021

Earthq Engng Struct Dyn

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“…Keivan and Zhang [102,103] presented a numerical investigation of self-centering eccentrically braced frame (SCEBF) subjected to seismic excitation, aiming to study the nonlinear seismic system behavior of K-type, D-type, and Y-type SCEBFs. It was validated that SCEBF systems could be designed to possess strength and stiffness comparable to traditional steel EBFs while preserving plumbness subjected to DBE.…”

Section: Advances In Civil Engineeringmentioning

confidence: 99%

Self‐Centering Steel Frame Systems for Seismic‐Resistant Structures

Zhu

Zhao

2020

Advances in Civil Engineering

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This paper introduces a review of self-centering steel frame systems for seismic-resistant structures. The components and basic mechanisms of the developing posttensioned connections and self-centering braces are briefly introduced. The structural details and seismic behaviors of the self-centering systems proposed in recent years, including connections, energy dissipating braces, and steel frames, are condensed in categories. The theoretical and experimental results indicated that self-centering action could minimize residual deformation and structural damage. The energy dissipating capability of the self-centering systems is greatly enhanced by the application of energy dissipating device. The shape memory alloys (SMAs) and prepressed springs which exhibited great potential in energy dissipation and recentering capability have been studied increasingly in recent years. Abundant numerical models were propounded to investigate the cyclic response of these self-centering systems. The current research challenges and the critical issues which need further study are discussed at the end of this paper.

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“…Special designs with vertical or sliding rocking links might also be applied to eliminate the gap‐opening expansion phenomenon. Keivan and Zhang 16 studied the nonlinear seismic performance of Y‐type self‐centering eccentrically braced frames (SCEBF‐Y) structure with vertical links. Rezvan and Zhang 17 proposed the D‐type SCEBF with a sliding rocking link beam to overcome the beam growth.…”

Section: Introductionmentioning

confidence: 99%

Seismic design and performance study of self‐centering moment‐resisting frames with sliding rocking beams and preloaded disc springs

Rezvan

Zhang

2023

Earthq Engng Struct Dyn

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This paper focuses on the seismic analysis and performance assessment of the self‐centering moment‐resisting frames with sliding rocking beams (SCMRF‐SRB) through a nonlinear numerical simulation study. In the SCMRF‐SRB systems, the beam is comprised of three segments with the rocking beam placed in the middle segment. The beam growth (expansion) problem due to the gap‐opening in the rocking joint is counteracted by the sliding movement of the rocking beam inside the beam brackets. The restoring force of such SCMRF‐SRBs is generated by two sets of preloaded disc springs mounted on each side of the web of the beam and the energy dissipation is provided by replaceable hysteretic dampers (RHD). The relative movement of the rocking beam inside the brackets generates a friction force that contributes to the energy dissipation capacity and strength of the system based on prior experimental observations. Load vs. displacement relationships of an SCMRF‐SRB modular structure were formulated and verified with nonlinear finite element analysis results. A three‐story building located in downtown Seattle was designed and its seismic performance was studied through nonlinear static and dynamic analyses. According to the results of the nonlinear dynamic analyses, the prototype structure met the expected performance criteria in terms of inter‐story drift ratio (IDR), re‐centering behavior, and responses of the frame member at design basis earthquake (DBE). In different parametric studies, the effect of the length and location of the rocking beam on the seismic performance of the prototype structure was investigated. Moreover, the effects of the energy dissipation capacity and post‐yielding stiffness on the structural responses of the prototype buildings were studied. It was also shown that an SCMRF‐SRB structure with a large energy dissipation ratio of up to 90% can be utilized without adversely affecting the self‐centering performance of the system.

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Nonlinear seismic performance of Y-type self-centering steel eccentrically braced frame buildings

Cited by 33 publications

References 22 publications

Nonlinear seismic performance study of D‐type self‐centering eccentric braced frames with sliding rocking link beams

Nonlinear seismic performance study of D‐type self‐centering eccentric braced frames with sliding rocking link beams

Self‐Centering Steel Frame Systems for Seismic‐Resistant Structures

Seismic design and performance study of self‐centering moment‐resisting frames with sliding rocking beams and preloaded disc springs

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