Subsoil classification and geotechnical zonation for Guadalajara City, México: Vs30, soil fundamental periods, 3D structure and profiles

Gaytán, Alejandro Ramírez; Estrella, Hortencia Flores; Preciado, Adolfo; Bandy, William L.; Lazcano, Salvador; Nolasco, Leonardo Alcántara; González, Jorge A.; Korn, M.

doi:10.1002/nsg.12085

Cited by 19 publications

(7 citation statements)

References 37 publications

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“…The dynamic seismic ampli cation may lead to collapses in brittle structures and intermediate to considerable damage with a high probability of collapse/permanent drifts in MRF structures and other buildings (e.g. Preciado et al 2020ab;Ramirez-Gaytan et al 2020). In this way, by comparing the T E and the T S parameters, we can infer areas vulnerable to intermediate/severe damage or collapse by resonance effects in case of an intermediate or high-intensity earthquake.…”

Section: Discussionmentioning

confidence: 99%

Geotechnical zonation and soil–structure interaction at Puerto Vallarta, México

et al. 2021

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We performed a seismic vulnerability assessment that involves geotechnical and building structure analysis for Puerto Vallarta, Mexico, a city located along the paci c coast. Like many other Latin American cities, has signi cant seismic risk. We implemented the multi-channel analysis of surface waves and the horizontal-to-vertical spectral ratio methods to estimate shear wave velocity and soil resonance frequency. We considered standard penetration test to determine the penetration resistance and soil classi cation. We also de ned building typologies based on construction materials and structural systems. The VS30 parameter shows that Puerto Vallarta has the three poorest soil classi cations. The resonance frequency parameter shows four zones with different fundamental soil periods. We inferred the building's vulnerability from the coupling between the structural and soil fundamental period and the soil characteristics. The analysis shows several vulnerable buildings scatters within the city, e.g., within the tourist area, con ned masonry buildings from one to ve stories and moment resistance frame buildings up to 12 in the tourist area, poorly con ned masonry houses of one to two stories, and con ned masonry buildings of one to ve stories in the residential/commercial. We present an approach that combines the academic and government to solve a real and transcendental problem since it might directly affect the regulation and structure evaluations in the area. We are sure that these exercises are of great interest in urban growth areas in other parts of the world, especially in Latin America, to achieve seismic risk mitigation.

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Section: Discussionmentioning

confidence: 99%

Geotechnical zonation and soil–structure interaction at Puerto Vallarta, México

et al. 2021

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“…The MASW was recognized as an efficient method for elastic property of near-surface materials investigation and has found wide applications such as bedrock mapping (Miller et al 1999;Park 2016), marine environments investigation (Kaufmann et al, 2005), hydrogeological studies (Suto, 2012;Pasquet et al, 2015), landslides (Suto et al, 2016;Strelec et al, 2017), liquification potential analysis (Lin et al, 2004), karst investigation (Debeglia et al, 2006), geotechnical site characterization (Penumadu and Park, 2005;Park, 2013;Abudeif et al, 2019) etc. MASW has also become very common tool for average shear wave velocity in the upper 30 m (Vs30) determination (Gaytan et al, 2020;Sairam et al, 2019;Hollender et al, 2018;Odum et al, 2013;Foti et al, 2011). Kanli et al (2006) were using MASW for Vs30 mapping and soil classification in Turkey, Rahman et al (2018) estimated Vs30 in 151 sites in Dhaka, capital city of Bangladesh using MASW as one of the methods.…”

Section: Introductionmentioning

confidence: 99%

Surface waves as a cost-effective tool for enhancing the interpretation of shallow refraction seismic data

Mazanec

2023

Acta Geodynamica Et Geomaterialia

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Surface waves typically constitute the dominant component of the seismic record, thus yielding the highest signal-to-noise ratio. Their propagation velocities are closely linked to the shear-wave velocity of the medium. In this study, we provide a review of the basics of surface wave analysis, focusing on Multichannel Analysis of Surface Waves (MASW). We illustrate this approach through four case studies representing common geophysical tasks. By incorporating basic surface wave dispersion analysis into standard refraction surveys, we aim to reduce solution ambiguity and enhance knowledge without incurring additional costs. In Case Study 1, we address the topic of vertical geophone natural frequencies and compare data acquired simultaneously, concluding that even with 10 Hz geophones, surface wave dispersion analysis can yield satisfactory results. Case Study 2 demonstrates that MASW analysis can successfully supplement the standard traveltime tomography and help define geological interfaces. In Case Study 3, we demonstrate that obtaining P-wave and S-wave velocities from a single acquisition setup can aid in determining groundwater level. Case Study 4 showcases an example of joint passive and active MASW analysis, resulting in an extended shear wave velocity model. As our four case studies illustrate, when used appropriately and with an understanding of its limitations, MASW can serve as a powerful tool for subsurface investigation across various geological and geotechnical settings, significantly augmenting the knowledge derived from refraction data.

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“…Some authors have applied this method to assess the impact that seismic amplification has had on civil structures affected by past earthquakes [4,5], for the evaluation of the liquefaction potential of soils [6,7], for studies of amplification of areas for future civil projects [7,8], for the assessment of the impact of earthquakes on existing civil structures typical of urban environments [9][10][11], in studies related to landslides [12,13], in coastal and port areas [4,9,14,15] and for the site characterization of seismic stations [16][17][18]. In Panama, several studies have been carried out on the estimation of side effects in some cities [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Horizontal-to-Vertical Spectral Ratios and Refraction Microtremor Analyses for Seismic Site Effects and Soil Classification in the City of David, Western Panama

Grajales-Saavedra,

Mojica,

et al. 2023

Geosciences

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The City of David constitutes one of the most important commercial centers of the Republic of Panama. However, it is located on a coastal plane, close to an area with high seismic activity and has been affected by significant earthquakes (18 July 1934, Mw = 7.4 and 12 March 1962, Mw = 6.7). The goal of this study is to estimate the seismic effects and to classify the soil in the City of David. The experimental work entailed the measurement of environmental noise for H/V spectral ratio (HVSR) analyzed at 22 stations. A series of microtremor refraction studies (ReMi) at six stations distributed from north to south of the city was also performed. The stations were distributed around urban areas of the city, which are characterized by the presence of water supply, sewerage, buildings, roads, etc. The spectral analysis of environmental noise allowed the generation of three different types of maps: First, predominant frequency maps (f0) with zones composed mainly of rigid and semi-rigid soils in the southern end of the city and rigid soils in the central and northern regions. Secondly, maximum H/V amplitude maps (A0) which evidence a low range of HVSR amplitude in the city, ranging from 1.1 to 3.8. Finally, liquefaction vulnerability (Kg) maps, with values less than 2 Hz−1, representative of a low liquefaction risk. Soil classification using ReMi and calculation of the corresponding Vs30 reveal type D soils, which correlate well with results obtained using HVSR analyses. A comparison between HVSR and ReMi shows that HVSR curves that exhibit clear peaks tend to be related to ReMi stations that presented relatively large shear-wave velocity contrasts at some depth. The results from this research are intended to aid the decision-making process related to the future development of the city, as well as government level maintenance and mitigation plans.

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Subsoil classification and geotechnical zonation for Guadalajara City, México: V_s₃₀, soil fundamental periods, 3D structure and profiles

Cited by 19 publications

References 37 publications

Geotechnical zonation and soil–structure interaction at Puerto Vallarta, México

Geotechnical zonation and soil–structure interaction at Puerto Vallarta, México

Surface waves as a cost-effective tool for enhancing the interpretation of shallow refraction seismic data

Horizontal-to-Vertical Spectral Ratios and Refraction Microtremor Analyses for Seismic Site Effects and Soil Classification in the City of David, Western Panama

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