Effect of Soil Properties and Input Motion on Site Amplification Using Validated Nonlinear Soil Model

2021 ◽  
Vol 207 (11) ◽  
pp. 1639-1663
Author(s):  
Samyog Shrestha ◽  
Efe G. Kurt ◽  
Kyungtae Kim ◽  
Arun Prakash ◽  
Ayhan Irfanoglu
Keyword(s):  
Soil Properties ◽  
Site Amplification ◽  
Soil Model ◽  
Input Motion

Simulation-based site amplification model for shallow bedrock sites in Korea

2021 ◽  
pp. 875529302098198
Author(s):  
Muhammad Aaqib ◽  
Duhee Park ◽  
Muhammad Bilal Adeel ◽  
Youssef M A Hashash ◽  
Okan Ilhan
Keyword(s):  
Linear Models ◽  
Site Response ◽  
Site Amplification ◽  
One Dimensional ◽  
Nonlinear Component ◽  
Nonlinear Site Response ◽  
Simulation Based ◽  
Linear And Nonlinear ◽  
Input Motion ◽  
Nonlinear Components

A new simulation-based site amplification model for shallow sites with thickness less than 30 m in Korea is developed. The site amplification model consists of linear and nonlinear components that are developed from one-dimensional linear and nonlinear site response analyses. A suite of measured shear wave velocity profiles is used to develop corresponding randomized profiles. A VS30 scaled linear amplification model and a model dependent on both VS30 and site period are developed. The proposed linear models compare well with the amplification equations developed for the western United States (WUS) at short periods but show a distinct curved bump between 0.1 and 0.5 s that corresponds to the range of site natural periods of shallow sites. The response at periods longer than 0.5 s is demonstrated to be lower than those of the WUS models. The functional form widely used in both WUS and central and eastern North America (CENA), for the nonlinear component of the site amplification model, is employed in this study. The slope of the proposed nonlinear component with respect to the input motion intensity is demonstrated to be higher than those of both the WUS and CENA models, particularly for soft sites with VS30 < 300 m/s and at periods shorter than 0.2 s. The nonlinear component deviates from the models for generic sites even at low ground motion intensities. The comparisons highlight the uniqueness of the amplification characteristics of shallow sites that a generic site amplification model is unable to capture.

Analysis of Site Response and Building Damage Distribution Induced by the 31 October 2002 Earthquake at San Giuliano di Puglia (Italy)

2013 ◽  
Vol 29 (2) ◽  
pp. 497-526 ◽  
Author(s):  
Rodolfo Puglia ◽  
Marco Vona ◽  
Peter Klin ◽  
Chiara Ladina ◽  
Angelo Masi ◽  
...  
Keyword(s):  
Seismic Response ◽  
Site Response ◽  
Spectral Element ◽  
Site Amplification ◽  
Damage Distribution ◽  
Numerical Predictions ◽  
Definition Of ◽  
Subsoil Model ◽  
Molise Earthquake ◽  
Input Motion

This paper concerns the analysis of the site amplification that significantly influenced the non-uniform damage distribution observed at San Giuliano di Puglia (Italy) after the 2002 Molise earthquake (MW = 5.7). In fact, the historical core of the town, settled on outcropping rock, received less damage than the more recent buildings, founded on a clayey subsoil. Comprehensive geotechnical and geophysical investigations allowed a detailed definition of the subsoil model. The seismic response of the subsoil was analyzed through 2-D finite-element and 3-D spectral-element methods. The accuracy of such models was verified by comparing the numerical predictions to the aftershocks recorded by a temporary seismic network. After calibration, the seismic response to a synthetic input motion reproducing the main shock was simulated. The influence of site amplification on the damage distribution observed was finally interpreted by combining the predicted variation of ground motion parameters with the structural vulnerability of the buildings.

scholarly journals RELIABILITY OF THE RESULTS OF THE CALCULATIONS IN THE FUNCTION OF THE SELECTED SOIL MODEL

2018 ◽  
Vol 13 (1) ◽  
Author(s):  
Mato Uljarević
Keyword(s):  
Soil Properties ◽  
Soil Model ◽  
Input Parameters ◽  
Selection Of

The reliability of geotechnical calculations is, as it is generally known, in function of the input parameters quality, both in terms of loads, as well as the physical and mechanical soil properties. In addition to above mentioned, reliability of the results of geotechnical analysis is also influenced by selection of constitutive soil model. This paper describes soil models and analyzes the suitability of the model on a real (implemented) geotechnical project.

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