An intraslab normal-faulting earthquake struck the central region of Mexico on 19 September 2017, leading to the collapse of 44 buildings in Mexico City. After the earthquake, the authors collected information in situ and through social media about the collapsed buildings, which was statistically processed to identify the causes of their collapse. This article presents the main collapse statistics, which revealed that 64% of the collapsed buildings had between 1 and 5 stories, 61% had a seismic-force-resisting system based on reinforced concrete columns with flat slabs, 57% experienced a soft-story mechanism, 91% were built before 1985, 43% were located at the corner blocks, and 10% exhibited pounding with neighboring buildings. The spatial distribution of the collapsed buildings and the recorded ground motion features suggest that short- and medium-period buildings having well-known vulnerabilities were particularly prone to collapse under amplified high-frequency seismic waves typical of intraslab normal-faulting earthquakes, such as the 2017 Puebla–Morelos earthquake.
AlcocerSMCastañoVM (2008) Evolution of codes for structural design in Mexico. Structural Survey26(1): 17–28.
3.
ArslanMHKorkmazHH (2007) What is to be learned from damage and failure of reinforced concrete structures during recent earthquakes in Turkey?Engineering Failure Analysis14(1): 1–22.
4.
ArtetaCACarrilloJArchboldJGasparDPajaroCAraujoGTorregrozaABonettRBlandonCFernandez-SolaLRCorrealJFMosalamKM (2019) Response of mid-rise reinforced concrete frame buildings to the 2017 Puebla earthquake. Earthquake Spectra35(4): 1763–1793.
5.
AslaniHMirandaE (2005) Fragility assessment of slab-column connections in existing non-ductile reinforced concrete buildings. Journal of Earthquake Engineering9(5): 777–804.
6.
De LucaFVerderameGMGómez-MartínezFPérez-GarcíaA (2014) The structural role played by masonry infills on RC building performances after the 2011 Lorca, Spain, earthquake. Bulletin of Earthquake Engineering12(5): 1999–2026.
7.
Del ValleE (1980) Some lessons from the March 14, 1979 earthquake in Mexico City. Proceedings of 7th world conference on earthquake engineering (part 1), Istanbul, Turkey, Summer, 1980, pp. 4545–4552. Available at: https://www.iitk.ac.in/nicee/wcee/article/7_vol4_545.pdf (accessed 30 June 2020).
ErberikMAElnashaiAS (2004) Fragility analysis of flat-slab structures. Engineering Structures26(7): 937–948.
13.
EstevaL (1970) Regionalización sísmica de México para fines de ingeniería [Seismic regionalization of Mexico with engineering purposes], Report no. 246. Mexico City: Universidad Nacional Autónoma de México, UNAM. Instituto de Ingeniería.
14.
EstevaL (1987) Earthquake engineering research and practice in Mexico after the 1985 earthquake. Pacific Conference on Earthquake Engineering20(3): 159–200.
15.
FoutchDAHjelmstadKDDel ValleEGutierrezEFDownsRE (1989) The Mexico earthquake of September 19, 1985—Case studies of seismic strengthening for two buildings in Mexico City. Earthquake Spectra5(1): 153–174.
16.
FrankeKWCandiaGMayoralJMWoodCMMontgomeryJHutchinsonTMorales-VelezAC (2019) Observed building damage patterns and foundation performance in Mexico City following the 2017 M7.1 Puebla-Mexico City earthquake. Soil Dynamics and Earthquake Engineering125: 105708.
17.
Fundación ICA (1988) Experiencias derivadas de los sismos de septiembre de 1985. Mexico City: Editorial Limusa.
GarcíaDSinghSKHerraízMOrdazMPachecoJF (2005) Inslab earthquakes of Central Mexico: Peak ground-motion parameters and response spectra. Bulletin of the Seismological Society of America95(6): 2272–2282.
20.
HeresiPRuiz-GarcíaJPayán-SerranoOMirandaE (this issue) Observations of Rayleigh Waves in Mexico City Valley during the September 19, 2017 Puebla- Morelos, Mexico Earthquake. Earthquake Spectra.
IrvineM (1973) The Veracruz Earthquake of 28 August 1973 (Report EER). Pasadena, CA: Earthquake Engineering Research Laboratory, California Institute of Technology.
23.
JaimesMARamirez-GaytanAReinosoE (2015) Ground-motion prediction model from intermediate-depth intraslab earthquakes at the hill and lake-bed zones of Mexico City. Journal of Earthquake Engineering19(8): 1260–1278.
MayoralJMAsimakiDTepalcapaSWoodCRoman-delaSanchaAHutchinsonTFrankeKMontalvaG (2019) Site effects in Mexico City basin: Past and present. Soil Dynamics and Earthquake Engineering121: 369–382.
26.
MeliR (1994) Structural design of masonry buildings: The Mexican practice. ACI Special Publication147: 239–262.
27.
MeliRMirandaE (1985) The Effect of the September 1985 Earthquake on the Constructed Facilities of Mexico City. Part I: Structural Aspects. Mexico City: Instituto de Ingenieria, Universidad Autonima de Mexico (UNAM).
28.
NTCS-04 (2004) Normas Técnicas Complementarias para diseño por sismo.
NTCS-871 (1987) Normas Técnicas Complementarias para diseño por sismo.
31.
OrdazMMeliR (2004) Seismic design codes in Mexico. In: Proceedings of 13th world conference on earthquake engineering − 13WCEE. Vancouver, BC, Canada, Summer 2004.
32.
OrdazMMirandaEAvilésJ (2003) Propuesta de espectros de diseño por sismo para el DF [Proposal of seismic design spectra for Mexico DF]. Revista Internacional de Ingeniería de Estructuras8: 189–208.
33.
PapazoglouAJElnashaiAS (1996) Analytical and field evidence of the damaging effect of vertical earthquake ground motion. Earthquake Engineering and Structural Dynamics25(10): 1109–1137.
34.
PinzónLAPujadesLGDiazSAAlvaRE (2018) Do directionality effects influence expected damage? A case study of the 2017 central Mexico earthquake. Bulletin of the Seismological Society of America108(5): 2543–2555.
35.
Pozos-EstradaAGomezRHongH (2014) Desagregación del peligro sísmico para algunos sitios seleccionados de México [Seismic Hazard Deaggregation for Some Selected Sites of México city]. Revista de Ingeniería Sísmica53(91): 31–53.
36.
RosenbluethE (1956) Aseismic design in Mexico. In: Proceedings of the 1st world conference on earthquake engineering - 1WCEE, Berkeley, CA, Summer 1956, pp. 24–1 to 24–7.
37.
RosenbluethE (1960a) Aseismic provisions for the Federal District’s Mexico. In: Proceedings of the 2nd world conference on earthquake engineering - 2WCEE, Tokyo, Japan, Summer 1960a, pp. 2009–2026.
38.
RosenbluethE (1960b) The earthquake of 28 July 1957 in Mexico City. In: Proceedings of the 2nd world conference on earthquake engineering - 2WCEE, Tokyo, Japan, Summer 1960a, pp. 359–378.
39.
RosenbluethE (1979) Seismic design requirements in a Mexican 1976 code. Earthquake Engineering & Structural Dynamics7(1): 49–61.
40.
RosenbluethEMeliR (1986) The 1985 Mexico earthquake. Concrete International8(5): 23–34.
41.
RosenbluethEOrdazMSanchez-SesmaFJSinghSK (1989) The Mexico earthquake of September 19, 1985-Design spectra for Mexicos Federal District. Earthquake Spectra5(1): 273–291.
Ruiz-GarcíaJMirandaE (2018) Evaluation of seismic displacement demands from the September 19, 2017 Puebla-Morelos (Mw = 7.1) earthquake in Mexico City. Earthquake Engineering and Structural Dynamics47(13): 2726–2732.
44.
SacramentoPVPFerreiraMPOliveiraDRCMeloGSSA (2012) Punching strength of reinforced concrete flat slabs without shear reinforcement. Ibracon Structures and Materials Journal5(5): 659–674.
Servicio Sismológico Nacional Universidad Autonómade México(SSN UNAM) (2017) Reporte especial: Sismo del día 19 de Septiembre de 2017, Puebla-Morelos (M 7.1). Mexico City: Servicio Sismológico Nacional, Universidad Autonóma de México.
SinghSKOrdazMAlcantaraLShapiroNKostoglodovVPachecoJFAlcocerSGutierrezCQuaasRMikumoTOvandoE (2000) The Oaxaca earthquake of 30 September 1999 (Mw = 7.5): A normal-faulting event in the subducted Cocos Plate. Seismological Research Letters71(1): 67–78.
49.
SinghSKOrdazMPérez-RochaLE (1996) The great Mexican earthquake of 19 June 1858: Expected ground motions and damage in Mexico City from a similar future event. Bulletin of the Seismological Society of America86(6): 1655–1666.
50.
SinghSKOrdazMPachecoJFQuaasRAlcantaraLAlcocerSGutierrezCMeliROvandoE (1999) A preliminary report on the Tehuacan, Mexico earthquake of June 15, 1999 (Mw = 7.0). Seismological Research Letters70(5): 489–504.
51.
SinghSKOrdazMPérez-CamposXIglesiasA (2015) Intraslab versus interplate earthquakes as recorded in Mexico City: Implications for seismic hazard. Earthquake Spectra31(2): 795–812.
52.
SinghSKReinosoEArroyoDOrdazMCruz-AtienzaVPérez-CamposXIglesiasAHjörleifsdóttirV (2018) Deadly intraslab Mexico Earthquake of 19 September 2017 (Mw 7.1): Ground motion and damage pattern in Mexico City. Seismological Research Letters89(6): 2193–2203.
53.
SinghSKSuárezGDomínguezT (1985) The Oaxaca, Mexico, Earthquake of 1931: Lithospheric normal faulting in the subducted cocos plate. Nature317(6032): 56–58.
54.
SozenMAJenningsPCMatthiesenRBHousnerGWNewmarkNM (1968) Engineering report on the Caracas Earthquake of 29 July 1967. National Academy of Sciences50(12).
55.
Tapia-HernándezEGarcía-CarreraJS (2020) Damage assessment and seismic behavior of steel buildings during the Mexico earthquake of 19 September 2017. Earthquake Spectra36: 250–270.
WightJKMacGregorJG (2012) Reinforced Concrete Mechanics and Design. 6th ed. Upper Saddle River, NJ: Pearson Education.
58.
YamamotoJJiménezZMotaR (1984) “El temblor de Huajuapan de Leon, Oaxaca, Mexico, del 24 de Octubre de 1980” [The Huajuapan de Leon, Oaxaca, Mexico Earthquake on October 24th, 1980]. Geofisica Internacional23(1): 83–110.
59.
YamamotoJQuintanarLRebollarCJJiménezZ (2002) Source characteristics and propagation effects of the Puebla, Mexico, earthquake of 15 June 1999. Bulletin of the Seismological Society of America92(6): 2126–2138.
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