Seismic behaviour of combined steel framed-tube substructure with replaceable shear links

Guan, Binlin; Su, Mingzhou; Lian, Ming

doi:10.1016/j.jcsr.2020.105968

Cited by 14 publications

(4 citation statements)

References 17 publications

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“…Hence, this system dissipates energy by a shear yielding mechanism instead of the flexural yielding behavior. Nikoukalam and Dolatshahi (2014) introduced the concept of the shear link frame, and this idea was later investigated by Dolatshahi et al (2018), (2021), Mahmoudi et al (2016Mahmoudi et al ( , 2019, Lian et al (2020), Guan et al (2020. This category of studies experimentally investigated the shear link frame issue in one bay frame and showed its performance.…”

Section: Introductionmentioning

confidence: 99%

Dual moment resisting-shear link frames: experimental and numerical investigation

Mahmoudi

Rahai

Hatami

2023

Preprint

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Moment resisting frames (MRFs) are one of the most favorable systems, thanks to their appropriate performance and sufficient geometric flexibility. Despite these advantages, MRFs have limitations such as low stiffness and certain code limitations. This paper provides the experimental and numerical results of a novel dual lateral load resisting system. This dual system is proposed to combine the flexural and shear nonlinear behavior of MRFs with different lengths. In the proposed dual system, MRFs are combined with frames that have a shear link with a smaller cross-section at the mid-span. This combination transfers the first plastic hinges location from the beam ends of the MRFs to the mid-span of the shear link frames. Two 1/3-scale tests are performed in the strong floor lab, and the frames are tested under quasi-static cyclic loading. In addition to increasing the stiffness of the system, the novel dual system waives the code requirement to satisfy the constraint on the beam span-to-depth (span/depth) ratio. Furthermore, the new dual system improves the resilience of the system due to the substitutability of the shear link after an earthquake. Moreover, verified 3D finite element models of the moment resisting-shear link frames dual system are also used to demonstrate the performance of the new dual system.

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Section: Introductionmentioning

confidence: 99%

Dual moment resisting-shear link frames: experimental and numerical investigation

Mahmoudi

Rahai

Hatami

2023

Preprint

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“…High‐strength steel framed‐tube structures with endplate connected shear links (HSS‐FTS‐RSL) were introduced by Lian et al to address the aforementioned deficiency. [ 23–25 ] In the proposed system, shear links fabricated with conventional mild steel were incorporated along the mid‐length of the spandrel beam, which acts as the structural fuse. The remaining peripheral members were fabricated with high‐strength steel.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of high‐strength steel framed‐tube structures with web‐bolted double‐channel shear links

Lian

Cheng

et al. 2021

Structural Design Tall Build

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Summary An innovative high‐strength steel framed‐tube structure system with web‐bolted double‐channel shear links (SFTS‐WSL) is introduced herein as an alternative solution to strengthening the seismic performance and earthquake resilience of structures while maintaining the recognized advantages of conventional steel framed‐tube structures (SFTS). In the SFTS‐WSL, the shear links consist of a double‐channel section connected to the ends of spandrel beams via web‐bolted connections. A 2/3‐scale subassembly was tested under cyclic loading to investigate the seismic behavior and replaceability of the links. The results indicate that the expected ductile failure mode is characterized by the web fracture of the links. To readily replace the links, the allowable residual story drift ratio should be 0.31%. Thereafter, a simplified numerical model was developed using OpenSees, which provides accurate predictions for the hysteretic response of the SFTS‐WSL. Additionally, the superior performance of the SFTS‐WSL was benchmarked against that of the SFTS. Under the maximum considered earthquake conditions, the average base shear and inter‐story drift ratio (IDR) of the SFTS‐WSL were 18.33% and 15.13% lower than those of the SFTS, respectively. Meanwhile, a small residual IDR of well below 0.31% enabled replacement of the damaged links to achieve post‐earthquake repair.

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“…Hence, high‐strength steel framed‐tube structure with nonlinear shear links (HSSFT‐SLs) were recently proposed and verified to enhance the global seismic performance of conventional steel framed‐tube structures. [ 6–8 ] In HSSFT‐SLs, as illustrated in Figure 1, high‐strength steel is applied for the peripheral key components, including corner columns, middle columns, and deep spandrel beams, to improve seismic response and recoverability by constraining the inelastic deformations in only nonlinear shear links and reducing the permanent residual drifts of structures under severe ground motion. Specifically, the shear links employed in the deep spandrel beams with low span‐to‐depth ratios are considered as primary dissipative elements to allow for the activation of ductile hysteretic dissipative mechanisms.…”

Section: Introductionmentioning

confidence: 99%

“…Guan et al [ 7 ] and Cheng et al [ 8 ] experimentally investigated the global seismic behavior of HSSFT‐SLs through quasistatic tests. The results showed that HSSFT‐SL systems exhibit excellent energy‐dissipation characteristics, high ductility, and acceptable residual permanent deformations.…”

Section: Introductionmentioning

confidence: 99%

Lateral force distribution in the inelastic state for seismic design of high‐strength steel framed‐tube structures with shear links

Zhang

Lian

et al. 2020

Structural Design Tall Build

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Summary High‐strength steel framed‐tube structures with shear links (HSSFT‐SLs) exhibit better performance under seismic loading than conventional steel framed‐tube structures. In this study, the optimum lateral force distribution considering the higher mode effects in an inelastic state for the seismic design of HSSFT‐SLs was investigated to overcome the shortcomings of existing lateral force distribution patterns. A series of example structures with expected yield mechanisms were designed, and their finite element (FE) models were developed by using OpenSees program. The modeling approach was verified using experimental data. The influence of several important parameters on the lateral force distribution in the inelastic state was investigated. An optimum lateral force distribution in inelastic state was obtained by using the relative distribution of the maximum story shears of the FE models obtained from nonlinear time history analyses. The accuracy and effectiveness of the proposed lateral force distribution were assessed through comparison with code‐specified lateral load patterns. The suggested lateral force distribution exhibits more rational and higher precision than other patterns in the inelastic state and may provide a useful reference for further research regarding the design of HSSFT‐SL systems.

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Seismic behaviour of combined steel framed-tube substructure with replaceable shear links

Cited by 14 publications

References 17 publications

Dual moment resisting-shear link frames: experimental and numerical investigation

Dual moment resisting-shear link frames: experimental and numerical investigation

Seismic performance of high‐strength steel framed‐tube structures with web‐bolted double‐channel shear links

Lateral force distribution in the inelastic state for seismic design of high‐strength steel framed‐tube structures with shear links

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