Evaluation of the change in dominant periods in the lake-bed zone of Mexico City produced by ground subsidence through the use of site amplification factors
Por:
Arroyo D., Ordaz M., Ovando-Shelley E., Guasch J.C., Lermo J., Perez C., Alcantara L., Ramírez-Centeno M.S.
Publicada:
1 ene 2013
Resumen:
We compute site amplification functions for several sites in Mexico City using actual accelerograms recorded from 1985 to 2010 and we present field evidence of the change in the dominant period of a given site (Ts) as a consequence of ground subsidence produced by groundwater withdrawal. The changes in Ts are larger in the lake-bed zone where thicker clay deposits exist, although there are sites in the southwest part of the lake-bed zone where Ts has remained constant. With the information obtained from the site amplification functions and available geotechnical soundings we develop an empirical model to estimate the future value of Ts for several sites in Mexico City. Because the practical application of the model requires extrapolation we also present a method to compute the uncertainty of the model when it is used to forecast a future value of Ts at a given site. Our results suggest that significant changes in the dominant period at several sites in Mexico City can be expected in the future. © 2012 Elsevier Ltd.
Filiaciones:
Arroyo D.:
Universidad Autónoma Metropolitana, Departamento de Materiales, Colonia Reynosa Tamaulipas, Av. San Pablo # 180, 02200 Mexico City, Mexico
Ordaz M.:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, Mexico
Ovando-Shelley E.:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, Mexico
Guasch J.C.:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, Mexico
Lermo J.:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, Mexico
Perez C.:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, Mexico
Alcantara L.:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, Mexico
Ramírez-Centeno M.S.:
Universidad Autónoma Metropolitana, Departamento de Materiales, Colonia Reynosa Tamaulipas, Av. San Pablo # 180, 02200 Mexico City, Mexico
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