Seismic ground response at Lotung: Hysteretic elasto-plastic-based 3D analyses |
| |
| Institution: | 1. Department of Structural and Geotechnical Engineering, Sapienza University of Rome (formerly Technical University of Bari), via Eudossiana 18, 00184 Rome, Italy;2. Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, via Terracini 28, 40131 Bologna, Italy;3. Department of Civil, Environmental, Building Engineering and Chemistry, Technical University of Bari, via Orabona 4, 70125 Bari, Italy;1. Department of Civil Engineering, Technical University of Berlin, Gustav-Meyer-Allee 25, D-13355 Berlin, Germany;2. GuD Geotechnical and Dynamic Consult GmbH, Darwinstrasse 13, D-10589 Berlin, Germany;1. Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India;1. Department of Civil Engineering, Universidad Nacional Autónoma de Honduras, Tegucigalpa, Honduras;2. Department of Civil Engineering, University of Patras, GR-26500 Patras, Greece;1. Researcher, Department of Civil Engineering, University of Bristol, Queen’s Building, Bristol, UK;2. Reader in Structural Dynamics, Department of Civil Engineering, University of Bristol, Queen’s Building, Bristol, UK;1. Institute of Geotechnical Engineering, Nanjing Tech University, Nanjing 210009, China;2. Civil Engineering and Earthquake Disaster Prevention Center of Jiangsu Province, Nanjing 210009, China;3. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100022, China;4. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;1. Department of Civil and Architectural Engineering, University of Wyoming, Department 3295, 1000 E. University Ave, Laramie, WY 82701, USA;2. Department of Civil, Architectural and Environmental Engineering, The University of Texas, 301 E Dean Keeton Stop C1792, Austin, TX 78712, USA |
| |
| Abstract: | This paper presents a non-linear finite element study to back-interpret the free field seismic response recorded at the Lotung Large-Scale Seismic Test site. The study is carried out in the time domain by the Finite Element (FE) code PLAXIS 3D, considering the vertical wave propagation of both the horizontal components of motion. The non-linear soil behaviour is simulated through a constitutive model, the Hardening Soil model with Small-Strain Stiffness (HSsmall), capable of describing the cyclic response of the material at different strain levels. In the paper, the constitutive response of the HSsmall model is firstly investigated through numerical simulations of strain-controlled cyclic shear tests under single and multi-directional conditions at low strain levels. Then, it is adopted to back-analyse the recorded free field seismic response, comparing the FE numerical results to the in-situ down-hole and surface signals recorded during two earthquakes occurred on May 20th and July 17th 1986, characterized by different peak ground accelerations. |
| |
| Keywords: | Lotung LSST Constitutive modelling Finite element analysis Seismic ground response Multidirectional shear strain conditions Numerical modelling |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
