Dynamic site characterization of areas affected by the 2017 Puebla-Mexico city earthquake

Wood, Charles D.; Deschenes, Michael R.; Ledezma, Christian; Meneses, J.F.; Montalva, Gonzalo A.; Morales-Vélez, Alesandra C.

doi:10.1016/j.soildyn.2019.105704

Cited by 8 publications

(18 citation statements)

References 10 publications

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“…However, given that the behavior of the clay layer remains linear up to high strain levels, non-invasive seismic surface wave measurements that develop a one-dimensional (1D) Vs profile at low strain levels are ideal candidates for rapid and cost-effective dynamic site characterization of the Basin. Nevertheless, a limited number of researchers have conducted such studies across the Basin (Mayoral et al, 2008(Mayoral et al, , 2016Wood et al, 2019). In addition, the properties of the lacustrine clay have been shown to be constantly changing within the Basin.…”

Section: Introductionmentioning

confidence: 99%

“…In this regard, many studies have utilized the microtremor horizontal-to-vertical spectral ratio (MHVSR) method for site period characterization across the Basin (e.g. Arroyo et al, 2013;Gurler et al, 2000;Lermo and Cha´vez-Garcı´a, 1994;Wood et al, 2019). Some of these studies were used to develop the Mexico City's Complementary Technical Norms for Seismic Design (Normas Te´cnicas Complementarias para Disen˜o Por Sismo, NTC-DS) (GDF, 2004) site period map, which can be used for predicting site period geospatially across the Basin.…”

Section: Introductionmentioning

confidence: 99%

“…This site period contour map is also used in the other sections of this article for comparison purposes since the Basin is divided into three major seismic zones, additionally, Zone III is subdivided into four sections. It has been shown that the 2004 site period map provided the most accurate site period predictions within the Basin following the 2017 event (Wood et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…The lacustrine clay layer in the Mexico City Basin has a shear wave velocity ( Vs ) generally less than 100 m/s and a variable thickness throughout the Basin (Mayoral et al, 2016; Pestana et al, 2002; Wood et al, 2019). The engineering properties of the lacustrine clay have been extensively investigated in the past (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Shear wave velocity and site period measurements for the western portion of the Mexico City Basin following the Mw7.1 2017 Puebla–Morelos, Mexico, earthquake

et al. 2022

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Dynamic site characterization was performed at 25 sites located on the western portion of the Mexico City Basin that were severely damaged during the Mw7.1 2017 Puebla–Morelos, Mexico, earthquake. Testing was conducted using active and passive seismic surface wave methods and the microtremor horizontal-to-vertical spectral ratio method to determine site periods and develop one-dimensional (1D) shear wave velocity ( Vs) profiles for the first 60 m of the subsoil. The measured site periods were compared to site period maps developed in 2004 and 2020 along with values computed using the Design Seismic Actions System (SASID) software following the 2020 version of the Complementary Technical Norms for Seismic Design (NTC-DS). The most noticeable biases in the predictions from the 2004 site period map were observed between the boundary of Zone II and Zone IIIa, at which site periods are overestimated. These estimates were improved upon in the 2020 site period map and showed a close similarity with SASID computed site period values. The Vs, depth, and thickness of the lacustrine clay layer were also determined to be quite variable within the basin. The softest sites are located between the lakebeds with a Vs between 45 and 57 m/s. Sites located toward the outer rim of the North lakebed have a higher Vs between 80 and 100 m/s. The thickness of the clay layer varies significantly in the western side of the Basin with values ranging between approximately 3 and 34 m. Overall, the results of this study indicate good agreement with the model embedded in the SASID software. The results (1) emphasize the need to regularly monitor changes that occur over time in the lacustrine clay layer, (2) complement the development of models that improve our understanding of wave propagation within the Basin, and (3) update and improve Mexico City’s Norms.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Shear wave velocity and site period measurements for the western portion of the Mexico City Basin following the Mw7.1 2017 Puebla–Morelos, Mexico, earthquake

et al. 2022

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“…Collapse and major structural damage was observed in on-site structures in some areas within the so-called lake, transition, and hill zones during the Puebla-Mexico 19 September 2017 earthquake (Asimaki et al, 2020; Franke et al, 2019; Mayoral et al, 2019a, 2019b, 2019c, 2019d; Montgomery et al, 2020; Roman et al, 2019; Wood et al, 2019). Overall, tunnel seismic performance was considered satisfactory; however, the tunnel discussed herein presented minor cracking in the primary lining (Figure 10).…”

Section: Observed Damagementioning

confidence: 99%

Tunnel performance during the Puebla-Mexico 19 September 2017 earthquake

et al. 2020

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Seismic performance of tunnels during earthquakes in densely populated areas requires assessing complex interactions with existing infrastructure such as bridges, urban overpasses, and metro stations, including low- to medium-rise buildings. This article presents the numerical study of an instrumented tunnel, currently under construction on stiff soils, located in the western part of Mexico City, during the Puebla-Mexico 19 September 2017 earthquake. Three-dimensional finite difference models were developed using the software FLAC3D. Initially, the static response of the tunnel was evaluated accounting for the excavation technique. Then, the seismic performance evaluation of the tunnel was carried out, computing ground deformations and factors of safety, considering soil nonlinearities. Good agreement was observed between predicted and observed damage during post-event site observations. Once the soundness of the numerical model was established, a numerical study was undertaken to investigate the effect of frequency content in tunnel-induced ground motion incoherence for tunnels built in cemented stiff soils. A series of strong ground motions recorded during normal and subduction events were used in the simulations, considering a return period of 250 years, as recommended in the Mexico City building code. From the results, it was concluded that the tunnel presence leads to important frequency content modification in the tunnel surroundings which can affect low- to mid-rise stiff structures located nearby. This important finding must be taken into account when assessing the seismic risk in highly populated urban areas, such as Mexico City.

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The MHVSR technique as a rapid, cost-effective, and noninvasive method for landslide investigation: case studies of Sand Gap and Ozark, AR, USA

2021

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Dynamic site characterization of areas affected by the 2017 Puebla-Mexico city earthquake

Cited by 8 publications

References 10 publications

Shear wave velocity and site period measurements for the western portion of the Mexico City Basin following the Mw7.1 2017 Puebla–Morelos, Mexico, earthquake

Shear wave velocity and site period measurements for the western portion of the Mexico City Basin following the Mw7.1 2017 Puebla–Morelos, Mexico, earthquake

Tunnel performance during the Puebla-Mexico 19 September 2017 earthquake

The MHVSR technique as a rapid, cost-effective, and noninvasive method for landslide investigation: case studies of Sand Gap and Ozark, AR, USA

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