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Steel and Composite Structures Volume 33, Number 1, October10 2019 , pages 19-36 DOI: https://doi.org/10.12989/scs.2019.33.1.019 |
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Seismic performance of composite plate shear walls with variable column flexural stiffness |
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Ivan Curkovic, Davor Skejic, Ivica Dzeba and Gianfranco De Matteis
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Abstract | ||
Cyclic behaviour of composite (steel - concrete) plate shear walls (CPSW) with variable column flexural stiffness is experimentally and numerically investigated. The investigation included design, fabrication and testing of three pairs of one-bay one-storey CPSW specimens. The reference specimen pair was designed in way that its column flexural stiffness corresponds to the value required by the design codes, while within the other two specimen pairs column flexural stiffness was reduced by 18% and 36%, respectively. Specimens were subjected to quasi-static cyclic tests. Obtained results indicate that column flexural stiffness reduction in CPSW does not have negative impact on the overall behaviour allowing for satisfactory performance for up to 4% storey drift ratio while also enabling inelastic buckling of the infill steel plate. Additionally, in comparison to similar steel plate shear wall (SPSW) specimens, column "pull-in" deformations are less pronounced within CPSW specimens. Therefore, the results indicate that prescribed minimal column flexural stiffness value used for CPSW might be conservative, and can additionally be reduced when compared to the prescribed value for SPSWs. Furthermore, finite element (FE) pushover simulations were conducted using shell and solid elements. Such FE models can adequately simulate cyclic behaviour of CPSW and as such could be further used for numerical parametric analyses. It is necessary to mention that the implemented pushover FE models were not able to adequately reproduce column "pull-in" deformation and that further development of FE simulations is required where cyclic loading of the shear walls needs to be simulated. | ||
Key Words | ||
composite plate shear wall; infill panel shear yield; quasi-static cyclic test; column flexural stiffness; finite element model | ||
Address | ||
(1) Ivan Curkovic, Davor Skejic, Ivica Dzeba: Department of Structures, University of Zagreb, Faculty of Civil Engineering, Kaciceva 26, 10000 Zagreb, Republic of Croatia; (2) Gianfranco De Matteis: Department of Architecture and Industrial Design, University of Campania Luigi Vanvitelli, Abbey of San Lorenzo in Septimum, 81031 Aversa (CE), Italy. | ||