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

Abstract

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.

Evaluation of Seismic Site Amplification Using 1D Site Response Analyses at Ba Dinh Square Area, Vietnam

“…One-dimensional equivalent linear (EQL) and nonlinear (NL) response analysis is performed using DEEPSOIL v7.0 [22] in this study. is program has been widely used in previous studies [7,16,[23][24][25][26]. One-dimensional site response analysis is the process of propagating shear waves numerically from the reference rock through the overlying soil layers to the surface.…”

“…Satyam and Towhata [14] assessed the ground response and liquefaction of the Vijayawada city (India). Aaqib et al [15] Aaqib et al [16] investigated the strength correction effect of sites in Korea. Recently, several studies have examined seismic hazard assessment of the Hanoi region ground [2,7,17,18].…”

Effect of Soil Anisotropy on Ground Motion Characteristics

“…One of the important causes of the structural damage caused by earthquakes is soil amplification. This is illustrated in damage assessments of buildings in the countries of Turkey [4][5][6], Greece [7], Iran [8], Mexico [9], Korea [10], Pakistan [11], and Nepal [12]. Numerous scholars have extensively researched the seismic resilience of engineering structures [13][14][15][16].…”

Geotechnical Property Modeling and Construction Safety Zoning Based on GIS and BIM Integration

“…It can be used to calculate the other geotechnical parameters of soil such as the angle of internal friction, relative density, shear modulus, shear wave velocity, Poisson's ratio, and shear strength [7][8][9]. The geotechnical modeling of the construction site can ensure the safe execution of the project and enhancing its feasibility, planning, and design phase [10,11]. Preparation of the geotechnical maps and division into subsequent zones is helpful for the authorities and practitioners as it results in cost and time-saving in the construction projects.…”