Influence of Diaphragm Flexibility on Seismic Response of Unreinforced Masonry Buildings |
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Authors: | Yasuto Nakamura Hossein Derakhshan Guido Magenes Michael C Griffith |
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Institution: | 1. School of Civil, Environmental and Mining Engineering, University of Adelaide, North Terrace, Adelaide, Australiayasuto.nakamura@adelaide.edu.au;3. School of Civil, Environmental and Mining Engineering, University of Adelaide, North Terrace, Adelaide, Australia;4. Department of Civil and Architectural Engineering, University of Pavia, Pavia, Italy |
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Abstract: | The effects of diaphragm flexibility on the seismic response of low-rise unreinforced masonry buildings are examined using one-way stiffness- and strength-eccentric single-story systems subjected to unidirectional ground excitation. A wide range of diaphragm stiffnesses are considered. Results show that diaphragm flexibility can induce different effects depending on the configuration of the system and the level of diaphragm flexibility. When diaphragm is relatively stiff, amplified displacement demands can be imposed on the flexible side of the structure. When diaphragm is relatively flexible, peak displacements of in-plane loaded walls generally reduce. A diaphragm classification is developed to capture these salient effects. |
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Keywords: | Flexible Diaphragm Unreinforced Masonry Plan Asymmetry Inelastic Response |
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