Seismic microzonation of Chania,Crete (Greece) based on SASW measurements and non-linear site response analyses |
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| Institution: | 1. School of Pedagogical & Technological Education (ASPETE), Department of Civil and Structural Engineering, Athens, GR 14121, Greece;2. University of Patras, Department of Civil Engineering, Patras, GR 26500, Greece;1. Institute for the Dynamics of Environmental Processes CNR, Milan, Italy;2. Territory, Urban Planning and Soil Protection, Lombardy region, Italy;3. Department of Civil and Environmental Engineer, University of Florence, Italy;4. Soils and Seismic Geological Service, Emilia-Romagna region, Italy;1. Dept. of Civil Eng., Univ. of Southern California, Los Angeles, CA 90089, USA;2. Dept. of Civil Eng. and Geodesy, Univ. of Novi Sad, 21000 Novi Sad, Republic of Serbia;3. Dept. of Geophysics, Faculty of Science, Univ. of Zagreb, Horvatovac bb, 10000 Zagreb, Croatia;4. Retired, Crvena skopska op?tina 4/1-1, Skopje, Macedonia;1. School of Civil Engineering, Dalian University of Technology, Dalian 116024, China;2. School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China;1. Department of Earth Sciences, University of Pisa, Pisa, Italy;2. School of Geosciences, University of Aberdeen, Aberdeen, Scotland, United Kingdom;3. ENEA Centro Ricerche Saluggia, Saluggia, Italy |
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| Abstract: | Following a brief overview of past applications of, and more recent advances on seismic microzonation, the results of a seismic microzonation study for the city of Chania, Greece, are presented. The study was based on Vs vs. depth profiles obtained at 19 sites of the urban area by performing SASW measurements. The spatial distribution of Vs values was utilized in estimating Vs30 values, depth to bedrock and the fundamental ground period variation across the area of the city as well as for conducting 1-D finite element non-linear inelastic site response analyses. The input earthquake excitations employed in the response analyses were based on the results of an available seismic hazard study for the Chania Area. The results of analyses were utilized for establishing the spatial distribution of rock motion amplification, the expected ground motions and spectral values in the area of the city. Contour maps providing values of the expected ground motion in the urban area are given which may become a practical tool in assessing the seismic risk and expected damage in the Chania area. The maps can also be used in the design of new earthquake resistant structures or the seismic retrofitting of existing ones. Finally, the results were utilized to demonstrate the inadequacy of using Vs,30 values for classifying the soil conditions in the Chania area. |
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| Keywords: | Seismic microzonation SASW EC-8 Site-dependent response |
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