Seismic performance of eccentrically braced frames with high strength steel combination

Lian, Ming; Su, Mingzhou; Guo, Yan

doi:10.12989/scs.2015.18.6.1517

Cited by 20 publications

(9 citation statements)

References 16 publications

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“…In order to validate the performance of the RTHS system presented in this paper under the selected seismic waves, RTHS results are compared with pure numerical simulations (PNS) in OpenSees and STTs in the study by Lian et al 24 …”

Section: Resultsmentioning

confidence: 99%

“…The prototype structure is taken from the half‐scale STT model in the study by Lian et al 24 The STT specimen is designed according to GB50011‐2010 (2016 edition) code 27 . The designed peak ground acceleration (PGA) of the prototype structure is 0.2 g with a 10% exceeding probability in 50 years.…”

Section: Rths System and Prototype Structure For Performance Evaluationmentioning

confidence: 99%

“…To simulate the response of a large‐scale or even full‐scale model during an earthquake, the actuator needs to have significant force and speed capability to apply command displacement to the experimental substructure, which poses a new challenge to RTHS. To bridge this knowledge gap, in this paper, an RTHS system with an adaptive feedforward delay compensator (AFC) was described in detail, and its performance was evaluated through RTHS of a three‐story space high‐strength steel composite Y‐eccentrically braced frame (Y‐HSS‐EBF) 24 . First, the validity of the RTHS method was verified by comparing with the numerical model and STT results.…”

Section: Introductionmentioning

confidence: 99%

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Real‐time hybrid simulation of a space substructure based on high‐strength steel composite Y‐eccentrically braced frames

Yan

et al. 2021

Struct Control Health Monit

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Summary Real‐time hybrid simulation (RTHS) is a novel structural seismic test method that has good application prospects. The applicability of RTHS for large‐scale space frame structures is further investigated in this study based on high‐strength steel composite Y‐eccentrically braced frames (Y‐HSS‐EBFs). First, an RTHS system was established, which included OpenSees, OpenFresco, an xPC‐Target, and an electrohydraulic servo control system. An adaptive feedforward delay compensator based on displacement prediction was introduced. Then, a shaking table test model of a three‐story Y‐HSS‐EBF was taken as the prototype, the third‐story frame with the strongest nonlinear performance was taken as the experimental substructure, and the remaining two stories were taken as the numerical substructure in order to perform the RTHS. The results of the RTHS were compared with those obtained in a purely numerical model and a shaking table test, and the stability of the RTHS system was analyzed. The results indicate that the RTHS results are in good agreement with the numerical simulation results and that RTHS can be used to obtain results similar to the ones obtained using the shaking table. In the typical seismic testing frequencies and the mass distribution ranges of the substructures, the RTHS system displayed good stability and reliability and was able to effectively evaluate the seismic performance of large‐scale space frame structures.

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Section: Resultsmentioning

confidence: 99%

Section: Rths System and Prototype Structure For Performance Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Real‐time hybrid simulation of a space substructure based on high‐strength steel composite Y‐eccentrically braced frames

Yan

et al. 2021

Struct Control Health Monit

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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%

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 performance of eccentrically braced frames with high strength steel combination

Cited by 20 publications

References 16 publications

Real‐time hybrid simulation of a space substructure based on high‐strength steel composite Y‐eccentrically braced frames

Real‐time hybrid simulation of a space substructure based on high‐strength steel composite Y‐eccentrically braced frames

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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