Soil damping influence on seismic ground response: A parametric analysis for weak to moderate ground motion

2015 ◽  
Vol 79 ◽  
pp. 71-79 ◽  
Author(s):  
Jacopo Boaga ◽  
Stefano Renzi ◽  
Rita Deiana ◽  
Giorgio Cassiani
Keyword(s):  
Ground Motion ◽  
Parametric Analysis ◽  
Ground Response ◽  
Soil Damping ◽  
Seismic Ground Response

Three-Dimensional Nonlinear Seismic Ground Response Analysis of Local Site Effects for Estimating Seismic Behavior of Buried Pipelines

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Tsuyoshi Ichimura ◽  
Kohei Fujita ◽  
Muneo Hori ◽  
Takashi Sakanoue ◽  
Ryo Hamanaka
Keyword(s):  
Ground Motion ◽  
Large Scale ◽  
Three Dimensional ◽  
Response Analysis ◽  
Buried Pipelines ◽  
Ground Response ◽  
Ground Response Analysis ◽  
Seismic Ground Motion ◽  
Local Site ◽  
Seismic Ground Response

Damage to buried pipelines caused by local amplification of seismic ground motion in highly nonuniform grounds is not yet fully understood. The development of methods to evaluate the amplification of ground motion in complex ground structures is thus desirable. Here, we report large-scale nonlinear seismic ground response analysis using a 3D nonlinear finite element method (FEM) and attempt to reproduce observed seismic ground motion. We also discuss the strain amplification processes and their effects on buried pipelines in detail. The findings are expected to aid in improving the seismic resistance of buried pipelines.

scholarly journals Ground Response and Historical Buildings in Avellino (Campania, Southern Italy): Clues from a Retrospective View Concerning the 1980 Irpinia-Basilicata Earthquake

Geosciences ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 503
Author(s):  
Lucia Nardone ◽  
Fabrizio Terenzio Gizzi ◽  
Rosalba Maresca
Keyword(s):  
Seismic Hazard ◽  
Ground Motion ◽  
Southern Italy ◽  
Strong Motion ◽  
Historical Buildings ◽  
Borehole Data ◽  
Ground Response ◽  
Maximum Acceleration ◽  
Observed Damage ◽  
Hazard Disaggregation

Cultural heritage represents our legacy with the past and our identity. However, to assure heritage can be passed on to future generations, it is required to put into the field knowledge as well as preventive and safeguard actions, especially for heritage located in seismic hazard-prone areas. With this in mind, the article deals with the analysis of ground response in the Avellino town (Campania, Southern Italy) and its correlation with the effects caused by the 23rd November 1980 Irpinia earthquake on the historical buildings. The aim is to get some clues about the earthquake damage cause-effect relationship. To estimate the ground motion response for Avellino, where strong-motion recordings are not available, we made use of the seismic hazard disaggregation. Then, we made extensive use of borehole data to build the lithological model so being able to assess the seismic ground response. Overall, results indicate that the complex subsoil layers influence the ground motion, particularly in the lowest period (0.1–0.5 s). The comparison with the observed damage of the selected historical buildings and the maximum acceleration expected indicates that the damage distribution cannot be explained by the surface geology effects alone.

Seismic ground-response studies in Olympia, Washington, and vicinity

1990 ◽  
Vol 80 (5) ◽  
pp. 1057-1078
Author(s):  
K. W. King ◽  
A. C. Tarr ◽  
D. L. Carver ◽  
R. A. Williams ◽  
D. M. Worley
Keyword(s):  
Seismic Waves ◽  
Hard Rock ◽  
Puget Sound ◽  
Open Pit ◽  
Site Conditions ◽  
Ground Response ◽  
Response Characteristics ◽  
Seismic Ground Response ◽  
Geological Units ◽  
The City

Abstract Relative seismic ground-response characteristics in the cities of Olympia, Lacey, and Tumwater, Washington, were determined from analysis of instrumentally recorded ground motion induced by blasts at an open-pit coal mine near Centralia, Washington. A ground-response function (GRF), defined as the ratio of Fourier spectral amplitudes at an alluvium site to spectral amplitudes on hard rock, is a measure of amplification of seismic waves by localized site conditions. GRF values in three frequency bands (0.5 to 1.0 Hz, 1.0 to 2.0 Hz, and 2.0 to 4.0 Hz) were compared with observed Modified Mercalli (MM) intensities from the 29 April 1965, Puget Sound earthquake and with mapped surficial geologic units. Typically, the GRF values relate well with the surficial geological units. In addition, MM intensities within the V to VII range appear to be directly related to the frequencies within the 0.5 to 4.0 Hz bandwidth such that MM V intensity sites had a lower GRF value in the 2.0 to 4.0 Hz bandwidth as compared to the 0.5 to 2.0 Hz bandwidth, and the MM VII intensity sites had higher GRF values in the 2.0 to 4.0 Hz bandwidth as compared to the 0.5 to 2.0 Hz bandwidth. The set of GRF values determined for the city of Olympia and its vicinity should be useful in formulating a theoretical relative ground-response model for the southern Puget Sound area.

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