Numerical Study On The Seismic Performance Of Hybrid Steel Moment Frames With Clt Balloon Shear Walls
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Numerical Study on the Seismic Performance of Hybrid Steel Moment Frames with CLT Balloon Shear Walls
Author | : Mehdi Khajehpour |
Publisher | : |
Total Pages | : |
Release | : 2020 |
Genre | : |
ISBN | : |
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A proposed hybrid lateral load resisting system combining a moderately ductile steel moment resisting frame (SMRF) with Cross-laminated Timber (CLT) balloon-framed shear walls is investigated on 8, 12 and 16-storey case-study buildings using equivalent static, linear dynamic (modal), nonlinear static (push-over) and nonlinear dynamic (time history) analyses. First, a SMRF is designed using ETABS, then the hybrid structures are analysed in OpenSees. By adding the CLT shear wall to steel moment frame, the period of structure decreased and its stiffness increased. The time history analyses result revealed that by adding the CLT shear wall the maximum drift decreased, while the maximum base shear in hybrid structure slightly increased. The hold down uplift forces under earthquake records are reported and compared to each other. Using push-over capacity-curves, a ductility reduction factor of 3.6, an over strength factor of 1.57 and a seismic response modification factor of 5.67 are derived.
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