Effects of deep excavation on seismic vulnerability of existing reinforced concrete framed structures |
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| Institution: | 1. Dept. of Civil Engineering, University of Salerno, Via Giovanni Paolo II, 84084 Fisciano, SA, Italy;2. Superior Istitute “Marini-Gioia”, Via Grade Lunghe, 84011 Amalfi, SA, Italy;1. School of Civil & Environmental Engrg., Nanyang Technological University, Nanyang Avenue, 639798, Singapore;2. National Joint Engineering Research Center of Geohazards Prevention in Reservoir Area Environment, School of Civil Engineering, Chongqing University, Chongqing 400045, China;3. WKS Geotechnical Consultants, 60 Kallang Pudding Road, 349320, Singapore;1. Land Transport Authority, No. 1, Hampshire Road, Singapore 219428, Singapore;2. Engineering Department,. University of Cambridge, Trumpington Street, Cambridge, CB2 1PZ, UK;1. Department of Construction Engineering, National Taiwan University of Science and Technology (Taiwan Tech), Taipei, Taiwan;2. Department of Civil Engineering, Zhejiang University, China;1. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan, China;2. School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan, China;3. Sinohydro Bureau 10 Co., Ltd., Chengdu, Sichuan, China;4. School of Civil and Environmental Engineering, Univ. of New South Wales, Sydney, Australia |
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| Abstract: | In this paper the effects of deep excavation on seismic vulnerability of existing buildings are investigated. It is well known that deep excavations induce significant changes both in stress and strain fields of the soil around them, causing a displacement field which can modify both the static and dynamic responses of existing buildings. A FEM model of a real case study, which takes into account geometry, non-linear soil behavior, live and dead loads, boundary conditions and soil–structure interaction, has been developed in order to estimate the soil displacements and their effects on seismic behavior of a reinforced concrete framed system close to deep excavation. Considering a significant accelerometric seismic input, the non-linear dynamic responses of the reinforced concrete framed structure, both in the pre and post-excavation configurations, have been evaluated and, then, compared to estimate the modification in seismic vulnerability, by means of different seismic damage indices and inter-story drifts. |
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| Keywords: | Seismic vulnerability Deep excavation Ground displacements Seismic damage indices Soil–structure interaction |
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