Impact of geometrical and mechanical characteristics on the spectral response of sediment-filled valleys |
| |
| Institution: | 1. Department of Geosciences, University of Texas at Austin, Austin, TX, USA;2. Institute for Computational Engineering and Science, University of Texas at Austin, TX, USA;1. School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China;2. The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, PR China;3. River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan;1. Department of Mathematics, Jaypee Institute of Information Technology, Noida-201307, India\n;2. Institute for Systems Studies & Analyses, DRDO, Delhi 110054, India\n;1. Dept. of Water Resources Eng., Faculty of Civil Eng., Univ. of Tabriz, Iran;2. Dept. of Biological and Agricultural Engineering, Texas A&M Univ., College Station, TX 77843-2117, USA;3. Zachry Department of Civil Engineering, Texas A&M Univ., College Station, TX 77843-2117, USA |
| |
| Abstract: | A comprehensive numerical analysis of the seismic response and site period of curved alluvial valleys was performed by taking into account the characteristics of sedimentary materials. This study presents a criterion as a combination of the three following geometrical and geotechnical characteristics of curved valleys in order to provide a simple method for code implementation of complex site effects: depth ratio, filling ratio and impedance ratio. The parametric studies were performed by a HYBRID program combining finite elements in the near field and boundary elements in the far field (FEM/BEM). The amplification patterns under above-mentioned characteristics were determined at the central point of valleys. The results are shown in the form of response spectra. Different impedance coefficients of materials were considered to evaluate effects resulting from combination with filling ratio and geometrical parameters. Finally, a criterion is proposed in terms of engineering applications to assess the spectral response at the surface of curved alluvial valleys. |
| |
| Keywords: | Site effect Hybrid numerical method Filled valleys Spectral response Filling ratio Impedance ratio |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
