Experimental and Analytical Investigation of D-Type Self-Centering Steel Eccentrically Braced Frames with Replaceable Hysteretic Damping Devices

Tong, Lewei; Zhang, Yunfeng; Zhou, Xin; Keivan, Ashkan; Li, Ruipeng

doi:10.1061/(asce)st.1943-541x.0002235

Cited by 29 publications

(17 citation statements)

References 37 publications

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“…Each plate is divided into a tapered length and a rectangular tongue which is directly inserted into the slots of the holder bracket. After gap‐opening, the energy dissipation of the system is mainly provided by the flexural yielding mechanism of these plates 25 …”

Section: Description Of the System Behavior And Componentsmentioning

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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Section: Description Of the System Behavior And Componentsmentioning

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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“…Nonetheless, even if the structure is subjected to a very large story drift and the PT cables are slacked, the authors found from the numerical simulation study that the structure would still maintain its stability because the RHD plates yielded and locked in the bracket slots (thus RHD behave like a partial moment connection), which can be very helpful to provide partial strength and stiffness to the severely damaged structure at the MCE R level earthquakes to avoid collapse. In order to enable the elastic response of the PT cables up to the drift demand at the DBE level, the minimum PT cable length, which is a function of the frame kinematics at the drift ratio limit at DBE (1.50%) and the initial post-tensioning force, should be provided as Equation (21).…”

Section: Design Of Scebf-srl Systemsmentioning

confidence: 99%

“…They reported that SCEBF buildings can be designed to have stiffness and ductility equal to the CEBFs. Tong et al 21 presented experimental, analytical, and numerical studies on the D-type SCEBF with replaceable hysteretic damping (RHD) devices. In such systems, the "beam growth" phenomenon is observed due to gap-opening at the end of rocking links beams.…”

Section: Introductionmentioning

confidence: 99%

“…The SCEBFs are designed in such a way that most of the damages will concentrate on the RHD devices, and the rocking link beam will remain undamaged. 21 As shown in Figure 2, an RHD device consists of multiple metallic hysteretic trapezoidal plates and a holder bracket. Each plate is divided into a tapered length and a rectangular tongue, which is directly inserted into the slots of the holder bracket.…”

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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“…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. Tong et al [104] experimentally and analytically investigated the D-type SCEBF with replaceable hysteretic damping (RHD) devices.…”

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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Experimental and Analytical Investigation of D-Type Self-Centering Steel Eccentrically Braced Frames with Replaceable Hysteretic Damping Devices

Cited by 29 publications

References 37 publications

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

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

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

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