Behavior and mechanisms of steel plate shear walls with coupling

Borello, Daniel J.; Fahnestock, Larry A.

doi:10.1016/j.jcsr.2011.12.009

Cited by 36 publications

(25 citation statements)

References 9 publications

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“…However, from the comparison of INT and SHEAR, it was also verified [13] that when the DC reaches an optimal value, a further increase in DC does not decrease weight or improve seismic response. The static and dynamic system overstrength coefficients increased, while the rotations of CB, axial forces of VBEs and shear proportion of the infill plates were reduced effectively.…”

Section: Discussionmentioning

confidence: 96%

“…The plastic mechanism of a SPSW provides high ductility and energy dissipation capacity through formation of plastic hinges at beam ends and column bases, along with fully developed tension fields in the infill plates, which have been studied thoroughly in prior research [3-10]. Therefore, researchers have recently considered an enhanced configuration, the SPSW with coupling (SPSW-WC), which provides greater architectural flexibility and material efficiency [12][13][14][15]. Despite the favorable *Correspondence to: Meng Wang, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the favorable *Correspondence to: Meng Wang, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China. Due to the coupled wall boundary frame contribution, infill plate thicknesses can be reduced, which in turn leads to smaller HBEs and VBEs, compared with a corresponding pair of planar SPSWs [13]. Therefore, researchers have recently considered an enhanced configuration, the SPSW with coupling (SPSW-WC), which provides greater architectural flexibility and material efficiency [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Boundary frame contribution in coupled and uncoupled steel plate shear walls

Wang

Borello

Fahnestock

2017

Earthq Engng Struct Dyn

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Summary The steel plate shear wall (SPSW) system is a robust option for earthquake resistance due to the strength, stiffness, ductility and energy dissipation that it provides. Although thin infill plates are efficient for resisting lateral loads, boundary frames that are proportioned based on capacity design requirements add significant structural weight that appears to be one of the factors limiting the use of the system in practice. An alternate configuration, the SPSW with coupling (SPSW‐WC), was explored recently as an option for increasing architectural flexibility while also improving overall system economy and seismic performance. The SPSW‐WC, which extensively employs flexural boundary frame contribution, has shown promise in analytical, numerical and experimental studies, but recent research on uncoupled SPSWs suggests that boundary frame contribution should not be considered for carrying seismic design shear. As a result, in the present study, boundary frame contribution in SPSWs was explored with detailed three‐dimensional finite element models, which were validated against large‐scale SPSW‐WC tests. Six‐story systems were considered, and the study matrix included single and double uncoupled SPSWs along with coupled SPSWs that had various degrees of coupling. Variations in design methodology were also explored. The modeling framework was employed to conduct static monotonic and cyclic pushover analyses and dynamic response history analysis. These analyses demonstrate the beneficial effect of coupling in SPSWs and illustrate the need to consider boundary frame contribution in design of coupled SPSWs. In addition, sharing design shear between the infill plate and the boundary frame is more generally shown to not be detrimental if this sharing is done in the design stage based on elastic analysis and the resulting boundary frame provides adequate secondary strength and stiffness following infill plate yielding. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Boundary frame contribution in coupled and uncoupled steel plate shear walls

Wang

Borello

Fahnestock

2017

Earthq Engng Struct Dyn

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“…The coupling mechanism in a C‐SPSW is formed by the net axial forces within the two SPSW piers when the system undergoes a lateral displacement. The DC of a C‐SPSW, which reflects the level of interaction between the two SPSW piers, can be expressed as follows:

italicDC = \frac{M_{Coupling}}{M_{Total}} = \frac{M_{Coupling}}{\sum M_{VBE} + \sum M_{Pier} + M_{Coupling}} .

…”

Section: Plastic Analysis and Efficient Designmentioning

confidence: 99%

Seismic behavior of coupled steel plate shear walls with simple boundary frame connections

Gorji

Cheng

2018

Earthq Engng Struct Dyn

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Summary The coupled steel plate shear wall (C‐SPSW) configuration has been investigated by researchers as a means of improving the overturning stiffness and architectural flexibility of SPSW structures. While C‐SPSWs have been shown to exhibit excellent seismic performance, the fabrication cost associated with the high number of moment‐resisting connections used in such systems is a potential detraction to their use as an economical solution. Past research has shown that the hysteresis response of SPSWs with simple frame connections is significantly pinched, and as such, most seismic codes prohibit their use in high seismic areas. However, when used in the C‐SPSW configuration, a dual system is formed in which the coupling beams not only improve resistance to overturning but also provide substantial lateral strength and energy dissipation capacity. This paper presents an exploration of the potential to improve the economy of C‐SPSWs by using the simple boundary frame connections. First, employing the principles of plastic analysis, an attempt is made to quantify the contribution of the coupling beams to the overall lateral load resistance of the system. Then, to evaluate the seismic performance of such C‐SPSW systems and allow for the comparison with that of the C‐SPSWs with rigid frames, several prototypes are designed and analyzed using a series of nonlinear response history and pushover analyses. The results indicated that the C‐SPSWs with simple boundary frames exhibited satisfactory seismic performance comparable with that of the C‐SPSWs with rigid frames under both the 10/50 and 2/50 hazard levels, while allowing for reduced fabrication costs.

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“…With regards to steel structures, there are several references to coupled SPSWs being investigated. Borello and Fahnestock () reported a 15–40% weight reduction when using a coupled equivalent pair of planer SPSWs in comparison with uncoupled ones. The pair also expressed the best value of Degree of Coupling (DC) at approximately 50%.…”

Section: Introductionmentioning

confidence: 99%

Optimized design procedure for coupling panels in steel plate shear walls

Eshkevari

Dolatshahi

Mofid

2016

Structural Design Tall Build

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Summary Coupling beams have had a widespread application as performance enhancing devices within concrete structures and more recently also in steel structures. However, the conventional coupling beams are not so efficient in coupling distant walls. In this paper, a novel form of coupling members, namely, coupling panels is proposed and, then, the application for a nine‐story building is investigated. Coupling panels are steel plates which are exerted in the intermediate spans between adjacent shear walls and act as a mega‐coupling beam. First, a verified finite element model is constructed to demonstrate coupling panel behavior along with its global structural mechanism. Subsequently, a nine story building is designed and retrofitted as a new and existing building, using coupling panels. Moreover, an innovative optimization algorithm is proposed in order to achieve the best plate configuration to improve the structural performance using Nonlinear Static Analysis, Modal Pushover Analysis and Time History Analysis and the corresponding results are compared. In summary, it is shown that coupling panels can considerably control structural deformation demands toward a uniform pattern and reduce demands of main shear walls. The optimized design method also leads to a more economical design in comparison with force‐based design approaches. In addition, the proposed coupling panels are shown to be significantly effective, regarding to energy dissipation during earthquakes, and can enhance the structural resiliency. Copyright © 2016 John Wiley & Sons, Ltd.

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Behavior and mechanisms of steel plate shear walls with coupling

Cited by 36 publications

References 9 publications

Boundary frame contribution in coupled and uncoupled steel plate shear walls

Boundary frame contribution in coupled and uncoupled steel plate shear walls

Seismic behavior of coupled steel plate shear walls with simple boundary frame connections

Optimized design procedure for coupling panels in steel plate shear walls

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