Seismic Microzonation of Site Effects

1999 ◽  
pp. 77-84
Author(s):  
Jean-Pierre Meneroud
Keyword(s):  
Site Effects ◽  
Seismic Microzonation

SEISMIC MICROZONATION AND SITE EFFECTS AT AL HOCEIMA CITY, MOROCCO

2004 ◽  
Vol 8 (4) ◽  
pp. 585-596 ◽  
Author(s):  
ABDELOUAHID TALHAOUI ◽  
AOMAR IBEN BRAHIM ◽  
M'HAMED ABERKAN ◽  
MOHAMED KASMI ◽  
AZELARAB EL MOURAOUAH
Keyword(s):  
Site Effects ◽  
Seismic Microzonation ◽  
Al Hoceima

Overview of local site effects and seismic microzonation mapping in Metropolitan Vancouver, British Columbia, Canada

2020 ◽  
Vol 270 ◽  
pp. 105568 ◽  
Author(s):  
Sheri Molnar ◽  
Jamal Assaf ◽  
Aamna Sirohey ◽  
Sujan Raj Adhikari
Keyword(s):  
British Columbia ◽  
Site Effects ◽  
Seismic Microzonation ◽  
Local Site Effects ◽  
Local Site

Seismic Microzonation and Site Effects Detection Through Microtremors Measures

2018 ◽  
pp. 326-349
Author(s):  
Francisco Alberto Calderon ◽  
Emilce Gisela Giolo ◽  
Carlos Daniel Frau ◽  
Marcelo Gerardo Jesús Guevara Rengel ◽  
Hernan Rodriguez ◽  
...  
Keyword(s):  
Site Effects ◽  
Amplification Factor ◽  
Seismic Microzonation ◽  
Poor Countries ◽  
Advantages And Disadvantages ◽  
Cheap Method ◽  
Hvsr Method ◽  
Seismic Amplification ◽  
Fundamental Reason ◽  
Well Correlation

Seismic microzonation of a city can be a difficult and expensive undertaking depending on the method used. In the last years, the HVSR method has been one of the most popular ways to define the natural frequency of the soil and seismic amplification factor in order to make quick microzonations due to that it is an expeditious and cheap method. This is very important in developing countries and poor countries. The fundamental reason to use this method is the fact that the amplification factor has well correlation with damage distribution. Additionally with the help of another methods it is possible obtain the structure of the superficial soil strata. In this chapter, an introduction with seismic microzonation, site effects concepts, microtremors, description of the HVSR method, advantages and disadvantages of this method, limitations and comparison with other methods, are presented. Finally, highlight of the importance of the method in order to identify site effects are displayed as examples and the incorporation of these data to Geographic Information Systems is also shown.

scholarly journals Integration of HVSR measures and stratigraphic constraints for seismic microzonation studies: the case of Oliveri (ME)

2014 ◽  
Vol 2 (4) ◽  
pp. 2597-2637 ◽  
Author(s):  
P. Di Stefano ◽  
D. Luzio ◽  
P. Renda ◽  
R. Martorana ◽  
P. Capizzi ◽  
...  
Keyword(s):  
Coastal Plain ◽  
Site Effects ◽  
Seismic Microzonation ◽  
Model Parameters ◽  
Frequency Range ◽  
Central Frequency ◽  
Clustering Technique ◽  
Data Inversion ◽  
Complete Set ◽  
The Town

Abstract. Because of its high seismic hazard the urban area of Oliveri has been subject of first level seismic microzonation. The town develops on a large coastal plain made of mixed fluvial/marine sediments, overlapping a complexly deformed substrate. In order to identify points on the area probably suffering relevant site effects and define a preliminary Vs subsurface model for the first level of microzonation, we performed 23 HVSR measurements. A clustering technique of continuous signals has been used to optimize the calculation of the HVSR curves. 42 reliable peaks of the H/V spectra in the frequency range 0.6–10 Hz have been identified. A second clustering technique has been applied to the set of 42 vectors, containing Cartesian coordinates, central frequency and amplitude of each peak to identify subsets which can be attributed to continuous spatial phenomena. The algorithm has identified three main clusters that cover significant parts of the territory of Oliveri. The HVSR data inversion has been constrained by stratigraphic data of a borehole. To map the trend of the roof of the seismic bedrock, from the complete set of model parameters only the depth of the seismic interface that generates peaks fitting those belonging to two clusters characterized by lower frequency has been extracted. The reconstructed trend of the top of the seismic bedrock highlight its deepening below the mouth of the Elicona Torrent, thus suggesting the possible presence of a buried paleo-valley.

Deterministic Approach for the Seismic Microzonation of Bucharest

2004 ◽  
Vol 161 (5-6) ◽  
pp. 1149-1164 ◽  
Author(s):  
C. O. Cioflan ◽  
B. F. Apostol ◽  
C. L. Moldoveanu ◽  
G. F. Panza ◽  
GH. Marmureanu
Keyword(s):  
Seismic Microzonation ◽  
Deterministic Approach

Site effects of the Denis-Perron dam (SM-3): A case study in Eastern North America

2021 ◽  
pp. 875529302110194
Author(s):  
Daniel Verret ◽  
Denis LeBœuf ◽  
Éric Péloquin
Keyword(s):  
North America ◽  
Ground Motion ◽  
Site Effects ◽  
Transfer Functions ◽  
Ground Motions ◽  
Published Data ◽  
Eastern North America ◽  
Ground Acceleration ◽  
Large Dams ◽  
Moderate Seismicity

Eastern North America (ENA) is part of a region with low-to-moderate seismicity; nonetheless, some significant seismic events have occurred in the last few decades. Recent events have reemphasized the need to review ENA seismicity and ground motion models, along with continually reevaluating and updating procedures related to the seismic safety assessment of hydroelectric infrastructures, particularly large dams in Québec. Furthermore, recent researchers have shown that site-specific characteristics, topography, and valley shapes may significantly aggravate the severity of ground motions. To the best of our knowledge, very few instrumental data from actual earthquakes have been published for examining the site effects of hydroelectric dam structures located in eastern Canada. This article presents an analysis of three small earthquakes that occurred in 1999 and 2002 at the Denis-Perron (SM-3) dam. This dam, the highest in Québec, is a rockfill embankment structure with a height of 171 m and a length of 378 m; it is located in a narrow valley. The ground motion datasets of these earthquakes include the bedrock and dam crest three-component accelerometer recordings. Ground motions are analyzed both in the time and frequency domains. The spectral ratios and transfer functions obtained from these small earthquakes provide new insights into the directionality of resonant frequencies, vibration modes, and site effects for the Denis-Perron dam. The crest amplifications observed for this dam are also compared with previously published data for large dams. New statistical relationships are proposed to establish dam crest amplification on the basis of the peak ground acceleration (PGA) at the foundation.

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