Undrained Seismic Response of Underground Structures
- Ingeniería sísmica
- Control de respuesta sísmica
- Control sísmico
- Drenaje
- Construcciones subterráneas
- Estructura de suelos

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Underground structures must be able to support static overburden loads, as well as to accommodate additional deformations imposed by seismic motions. It seems well established that the most critical demand to the structure is caused by shear waves traveling perpendicular to the tunnel axis, which cause distortions of the cross section (ovaling for a circular tunnel, and racking for a rectangular tunnel) that result in axial forces (thrusts) and bending moments. While all this has been well-studied for structures placed in linear-elastic ground under drained loading conditions, there is little information regarding the behavior of buried structures placed in nonlinear ground, especially under undrained loading conditions, i.e., when excess pore pressures generate and accumulate during the earthquake.
This book includes results of two-dimensional dynamic numerical analyses conducted to assess the seismic response of deep circular tunnels located far from the seismic source, under drained or undrained loading conditions. It is assumed that the liner remains elastic and that plane strain conditions apply. A new cyclic elastoplastic constitutive model is proposed to predict the nonlinear behavior and the excess pore pressures in the ground. The effect of the input frequency on the tunnel distortions of the cross section, and the effect of the relative stiffness between the liner and the ground on the distortions of the cross section, as well as, on the axial forces and bending moments of the liner are investigated. Excess pore pressures, shear stresses and plastic strains in the ground for different relative stiffness are also investigated.
Dr. Sandoval is an Assistant Professor of Civil Engineering at Universidad del Valle (Colombia). He holds a Geotechnical technology and a bachelor’s Science degree in Civil Engineering from Universidad del Cauca, in Popayán, Colombia, a Master of Science degree in Civil Engineering from University of Puerto Rico at Mayagüez, in Mayagüez, Puerto Rico, and a Doctor of Philosophy degree in Civil Engineering from Purdue University, in West Lafayette, Indiana, USA. Before becoming a professor, Dr. Sandoval worked over 10 years in practice. He was principal geotechnical engineer at Ingetec S.A. and staff engineer at Estudio de Suelos Ltda., both in Colombia. His main tasks involved dam designs, design of support for rock and soil slopes, design of shallow and heavy foundations, installation of dewatering systems, field exploration and field and laboratory geotechnical testing. Dr. Sandoval’s areas of interest include dynamic soil-structure interaction and underground structures, soil dynamics, constitutive modeling and shear strength of landfills.
Dr. Bobet is the Edgar B. and Hedwig M. Olson Professor of Civil Engineering at Purdue University (USA), and former Guest Professor and Visiting Chair Professor of the Innovation Center for Disaster Prevention at the School of Civil Engineering, Tongji University, China. He holds a bachelor’s and master’s degrees in Civil Engineering from Technical University of Madrid in Spain and a Doctor of Science degree from Massachusetts Institute of Technology, in Cambridge, Massachusetts, USA. Dr. Bobet has extensive experience in practice. He was senior geotechnical engineer at Euroestudios, consulting engineers, in Spain, for four years, and construction manager at Ferrovial, Spain, also for four years. Dr. Bobet’s areas of interest include rock mechanics, wave propagation through fractured media, soil-structure interaction and underground structures. He is a Fellow of ARMA, the American Rock Mechanics Association.

