Topographic amplification

Author: sylh

August undefined, 2024

Webtopographic amplification factor. A ratio, calculated solely from topographic (terrain elevation) data, of the diurnal temperature amplitude or range in a valley to that at the same altitude over the adjacent plain. The diurnal amplitude is larger (or "amplified") over the valley than over the plain because the volume of air is less in the ... WebDec 1, 2024 · Considering topographic amplification is particularly important for seismic design in mountainous regions like Hong Kong. Due to its complexity, topographic amplification has not yet been considered in most seismic design codes, with only a few exceptions such as the Eurocode 8, the 1995 France seismic code and the 2010 Chinese …

On the role of topographic amplification in seismic slope instabilities ...

WebMay 17, 2024 · The discrepancy possibly reflects the amplification of subsidence due to selective deployment of the GNSS stations in concave terrains Plain Language Summary … WebThe seismic topographic effect is one of the debated research topics in seismology and earthquake engineering. This debate is due to the discrepancy between the observed amplification and the amplification underestimation in numerical simulations. Although the numerical simulation of ground motion, which began in the 1970s, has been an important … setzer airship

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WebMay 17, 2024 · A tropical cyclone transports a large amount of sea water to land as water vapor. The water becomes a torrential downpour, and the rainwater temporarily staying on land depresses the solid earth as a load. WebMar 14, 2024 · @article{osti_1358161, title = {An experimental topographic amplification study at Los Alamos National Laboratory using ambient vibrations}, author = {Stolte, Andrew C. and Cox, Brady R. and Lee, Richard C.}, abstractNote = {An experimental study aimed at investigating potential topographic amplification of seismic waves was conducted on a … WebJul 7, 2024 · Previous studies, using displacement, acceleration and acceleration response spectra, reported topographic seismic amplification factors between 2 and 75 per cent, and found that amplification generally occurs at the slopes and at the top of topographic features whereas deamplification occurs at the bottom of slopes (e.g. Boore 1972; … the torridon inverness

Topographic effects on seismic responses of steep sloped

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WebOct 1, 2024 · The topographic amplification factors (TAFs) of PGA and PGV are found between 0.5 and 2.0, with a correlation coefficient of 0.7 between them. Predictive equations are proposed to correlate TAFs ... WebJan 1, 2005 · Pacoima Canyon is a narrow and steep canyon incised in gneissic and granitic rocks. Peak accelerations of nearly 1.6 g were recorded at a ridge that forms the left … the torrington companyWebJun 1, 1997 · The analysis of the site shows that although topographic amplification does in fact nearly double the amplitude of the motion in some cases, this amplification is offset by reduced site amplification and by wave splitting at material interfaces. Thus, the actual peak acceleration occurring at the crest of the slope changes little with incident ... setzer corporation

"WebMay 6, 2024 · Topographic amplification factor (TAF) is defined either as ratio of the PGA [16, 19] or Fourier spectra [3, 5, 15, 18] or response spectra [] of the ground motion … " - Topographic amplification

Topographic amplification

Webtopographic amplification factor. A ratio, calculated solely from topographic (terrain elevation) data, of the diurnal temperature amplitude or range in a valley to that at the … WebOct 1, 2024 · The topographic effect on ground motion amplification significantly decreases with an increase of the distance to the crest and it tends to zero in the vicinity of the free-field boundary. The intensity of amplification and the distribution of the maximum amplification on the ground surface behind the slope crest changes significantly with ...

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WebOct 26, 2024 · In order to analyze the impact of seismic waves on the venue earthquake, based on the display finite element method, the viscoelastic artificial boundary is used to analyze the variation of the ground motion amplification coefficient and the Fourier spectrum of the raised terrain under different incident angles with SV wave oblique … WebJan 1, 2012 · To study the amplification effect of slopes due to topographic and geological condition of the slope material, a homogenous slope model and a slope model with alternating layers of tuff and shale were built using ABAQUS software (Fig. 6). The homogenous slope model was taken to be wholly composed of tuffaceous material while …

WebApr 15, 2024 · The possible effect of topographic amplification on rockfall triggering was investigated by comparing the distribution of rockfall source areas to the relief energy. In Fig. 8, cumulative per cent distribution is plotted versus RE r for the steep rock faces (dashed line) and rockfall source areas (solid line). The diagram shows a quasi-uniform ... WebMay 9, 2024 · Topographic amplification compared to landslide source size, elevation, and slope (a) Positively amplified landslides (b) negatively amplified landslides. Insets shows histogram of the distribution of positively/negatively amplified landslides with respect to the normalized distance to the closest river (0 is at a river and 1 is at a ridge).

WebJan 1, 2005 · Pacoima Canyon is a narrow and steep canyon incised in gneissic and granitic rocks. Peak accelerations of nearly 1.6 g were recorded at a ridge that forms the left abutment of Pacoima Dam; peak accelerations at the bottom of the canyon were less than 0.5 g, suggesting the occurrence of topographic amplification. WebAbstract. Ground surface topography influences the spatial distribution of earthquake-induced ground shaking. This study shows the influence of topography on seismic …

WebSep 20, 2024 · In hilly areas, the topographic amplification is a crucial issue for earthquake-induced disasters. The 1991 Uttarkashi earthquake, 1999 Chamoli earthquake, 1999 …

Webthe site is particularly prone to seismic topographic amplification effects. In this… Visualizza altro The Caronia area is located in the Tyrrhenian north … the torrs ilfracombeWebNov 11, 2007 · In this paper, we evaluate the additive effects of topography, soil nonlinearity, and soil-structure interaction (SSI) along the crest of an idealized 40 m high cliff-type … the torrington telegram torrington wyWebApr 21, 2024 · To quantify the topographic amplification effect, an amplification factor (R-PHA) is defined as the ratio of the peak horizontal acceleration (PHA) measured at a monitoring point to that measured at AT1; hence, R-PHA>1.0 indicates amplification, R-PHA = 1.0 indicates non-amplification, and R-PHA<1.0 indicates de-amplification. ... setzer and sons catawba ncWebJun 1, 1997 · The analysis of the site shows that although topographic amplification does in fact nearly double the amplitude of the motion in some cases, this amplification is offset … setzer and hingham 2021 map setzer appliances on phillips hwyWebLastly, we couple the DRM with the PMLs to complete the seismic motion simulation engine. Using the developed toolchain, we then report results of parametric studies involving idealized topographic features, which show motion amplification that depends, as expected, on the relation between the topographic features' characteristics and the ... the torrs charitable trustWebAug 27, 2024 · In this research, topographic amplification is defined as the peak ground acceleration (PGA) for the crest to toe of the slope. To investigate the topographic effects … the torrington water company