Seismic Input Motion Determined from a Surface-Downhole Pair of Sensors: A Constrained Deconvolution Approach

2010 ◽  
Vol 100 (3) ◽  
pp. 1375-1380 ◽  
Author(s):  
D. Bindi ◽  
S. Parolai ◽  
M. Picozzi ◽  
A. Ansal
Keyword(s):  
Seismic Input ◽  
Input Motion

Analysis and Evaluation of the Liquefaction on Layered Soil

2002 ◽  
Author(s):  
Sang Hoon Lee ◽  
Kwang Hoon Yoo
Keyword(s):  
Nuclear Power ◽  
Time History ◽  
The Other ◽  
Liquefaction Potential ◽  
Analysis And Evaluation ◽  
Seismic Input ◽  
The Us ◽  
Input Motion ◽  
Maximum Shear Strength ◽  
Typical Soil

Liquefaction potential on the specific site of nuclear power plant is analyzed and reviewed. The layered site for this study consists of silt and sand. Based on the limited available soil data, maximum shear strength at critical locations using Seed & Idriss method and computer program SHAKE is calculated, and liquefaction potential is reviewed. As seismic input motion used for the assessment of liquefaction, the artificial time history compatible with the US NRC Regulatory Guide 1.60 is used. Assessment results of the liquefaction are validated by analyzing to the other typical soil foundations which can show the effects on the foundation depth and soil data.

scholarly journals Eliminating Conservatism in the Piping System Analysis Process Through Application of a Suite of Locally Appropriate Seismic Input Motions

2009 ◽  
Author(s):  
Anthony L. Crawford ◽  
Robert E. Spears ◽  
Mark J. Russell
Keyword(s):  
System Analysis ◽  
Seismic Analysis ◽  
Interaction Analysis ◽  
Department Of Energy ◽  
Piping System ◽  
Total Uncertainty ◽  
Seismic Input ◽  
Nuclear Systems ◽  
Computationally Intensive ◽  
Input Motion

Seismic analysis is of great importance in the evaluation of nuclear systems due to the heavy influence such loading has on their designs. Current Department of Energy seismic analysis techniques for a nuclear safety-related piping system typically involve application of a single conservative seismic input applied to the entire system [1]. A significant portion of this conservatism comes from the need to address the overlapping uncertainties in the seismic input and in the building response that transmits that input motion to the piping system. The approach presented in this paper addresses these two sources of uncertainty through the application of a suite of 32 earthquake realizations with equal probability of occurrence whose collective performance addresses the total uncertainty while each individual motion represents a single variation of it. It represents an extension of the soil-structure interaction analysis methodology of SEI/ASCE 43-05 [2] from the structure to individual piping components. Because this approach is computationally intensive, automation and other measures have been developed to make such an analysis efficient. These measures are detailed in this paper.

Seismic Input Motion Identification in a Heterogeneous Halfspace

2018 ◽  
Vol 144 (8) ◽  
pp. 04018070 ◽  
Author(s):  
C. Jeong ◽  
E. Esmaeilzadeh Seylabi
Keyword(s):  
Seismic Input ◽  
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.

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