Effect of soil depth on inelastic seismic response of structures |
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| Institution: | 1. Technical University of Madrid, Spain, ETSI Caminos, C y P., C/ Profesor Aranguren s/n, 28040 Madrid, Spain;2. Técnicas Reunidas, Spain;1. Key Laboratory of the Earth?s Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;2. Beijing Chinese Language and Culture College, Beijing 102206, China;1. Department of Civil Engineering, School of Science and Engineering, Sharif University of Technology, International Campus, Kish Island, P.O. Box 79417-76655, Kish, Iran;2. Department of Civil Engineering, Center of Excellence in Structures and Earthquake Engineering, Sharif University of Technology, P.O. Box 11365-9313, Tehran, Iran |
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| Abstract: | Effect of depth of soil stratum on estimated inelastic displacement of three typical structures, viz. a four storey building, a continuous bridge, and a tower, is studied and adequacy of the site amplification models of the current design codes and available empirical relationships is examined. The structures are assumed to be located on well-defined sites with varying bedrock depths, and effect of depth on elastic response spectrum, site amplification factor, displacement modification factor and inelastic displacement is studied, numerically, for two values of PGA. It is observed that soil depth has a significant effect on elastic as well as inelastic response of the structures; however, the effect of soil amplification on inelastic response is not as pronounced as in case of elastic response. Therefore, use of empirical site amplification models based on elastic response may be too conservative, for estimating inelastic response. |
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| Keywords: | Soil depth Response spectra Amplification factors Inelastic spectra Displacement modification factors Inelastic seismic response |
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