Seismic Analysis of Gravity Dam-reservoir-foundation System Using an Effective Hybrid Technique [microform] PDF Download

Author: Rajagopalan Chandrashaker
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN:
Category : Dams
Languages : en
Pages : 384

View

Book Description

Author: Rajagopalan Chandrashaker
Publisher:
ISBN:
Category : Dams
Languages : en
Pages : 384

View

Book Description

Author: Gaohui Wang
Publisher: Springer Nature
ISBN: 981156194X
Category : Technology & Engineering
Languages : en
Pages : 281

View

Book Description
This book evaluates the seismic performance of concrete gravity dams, considering the effects of strong motion duration, mainshock-aftershock seismic sequence, and near-fault ground motion. It employs both the extended finite element method (XFEM) and concrete damaged plasticity (CDP) models to characterize the mechanical behavior of concrete gravity dams under strong ground motions, including the dam-reservoir-foundation interaction. In addition, it discusses the effects of the initial crack, earthquake direction, and cross-stream seismic excitation on the nonlinear dynamic response to strong ground motions, and on the damage-cracking risk of concrete gravity dams. This book provides a theoretical basis for the seismic performance evaluation of high dams, and can also be used as a reference resource for researchers and graduate students engaged in the seismic design of high dams.

Author: Glauco Feltrin
Publisher: Birkhäuser
ISBN: 9783034876100
Category : Technology & Engineering
Languages : en
Pages : 0

View

Book Description
This report deals with the modeling and analysis of the earthquake behavior of concrete gravity dams. This task becomes very challenging when the interaction with the reservoir and foundation has to be considered. In addition, a concrete gravity dam may get severely damaged by dynami cally propagating cracks when subjected to a severe earthquake ground motion. This strongly nonlinear behavior of dams impedes the application of state-of-the-art frequency-domain meth ods for the analysis because the Superposition principle is no longer valid. As a consequence, the model has to be formulated in the time domain complicating the analysis even more. In this report, which is based on a doctoral thesis, a new method is presented that permits to develop absorbing boundary conditions for the nonlinear time-domain analysis of concrete grav ity dams. These conditions are based on a approximation of dynamic stiffness matrices using series of orthogonal functions and advanced model reduction techniques of linear systems theory. The new absorbing boundary conditions are very accurate so that they are virtually equivalent to dynarnic stiffness matrices obtained by a rigorous solution of a far field. This allows to reduce the size of near fields dramatically and permits an accurate and numerically efficient nonlinear time domain analysis.

Author: Glauco Feltrin
Publisher: Birkhäuser
ISBN: 9783764358693
Category : Technology & Engineering
Languages : en
Pages : 263

View

Book Description
This report deals with the modeling and analysis of the earthquake behavior of concrete gravity dams. This task becomes very challenging when the interaction with the reservoir and foundation has to be considered. In addition, a concrete gravity dam may get severely damaged by dynami cally propagating cracks when subjected to a severe earthquake ground motion. This strongly nonlinear behavior of dams impedes the application of state-of-the-art frequency-domain meth ods for the analysis because the Superposition principle is no longer valid. As a consequence, the model has to be formulated in the time domain complicating the analysis even more. In this report, which is based on a doctoral thesis, a new method is presented that permits to develop absorbing boundary conditions for the nonlinear time-domain analysis of concrete grav ity dams. These conditions are based on a approximation of dynamic stiffness matrices using series of orthogonal functions and advanced model reduction techniques of linear systems theory. The new absorbing boundary conditions are very accurate so that they are virtually equivalent to dynarnic stiffness matrices obtained by a rigorous solution of a far field. This allows to reduce the size of near fields dramatically and permits an accurate and numerically efficient nonlinear time domain analysis.

Author: Gurinderbir Singh Sooch
Publisher:
ISBN:
Category :
Languages : en
Pages :

View

Book Description

Author: Anil K. Chopra
Publisher:
ISBN:
Category : Concrete dams
Languages : en
Pages : 216

View

Book Description
A general procedure for analysis of the response of concrete gravity dams, including the dynamic effects of impounded water and flexible foundation rock, to the transverse (horizontal) and vertical components of earthquake ground motion is presented. The problem is reduced to one in two dimensions, considering the transverse vibration of a monolith of the dam. The system is analyzed under the assumption of linear behavior for the concrete, foundation rock and water. The complete system is considered as composed of three substructures -- the dam, represented as a finite element system, the fluid domain, as a continuum of infinite length in the upstream direction, and the foundation rock region as a viscoelastic halfplane. The structural displacements of the dam are expressed as a linear combination of Ritz vectors, chosen as normal modes of an associated undamped dam-foundation system. The effectiveness of this analytical formulation lies in its being able to produce excellent results by considering only a few Ritz vectors. The modal displacements due to earthquake motion are computed by synthesizing their complex frequency responses using Fast Fourier Transform procedures. The stress responses are calculated from the modal displacements. An example analysis is presented to illustrate results obtained from this analytical procedure. Computation times for several analyses are presented to illustrate effectiveness of the procedure.

Author: Jerry Foster
Publisher:
ISBN:
Category : Finite element method
Languages : en
Pages : 122

View

Book Description

Author: J. Paul Guyer, P.E., R.A.
Publisher: Guyer Partners
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 32

View

Book Description
Introductory technical guidance for civil and geotechnical engineers interested seismic engineering of hydraulic structures such as those associated with locks and dams. Here is what is discussed: 1. PROGRESSIVE ANALYSIS METHODOLOGY 2. METHODS OF ANALYSIS 3. MODELING OF STRUCTURAL SYSTEMS 4. EFFECTIVE STIFFNESS 5. DAMPING 6. INTERACTION WITH BACKFILL SOIL 7. PERMANENT SLIDING DISPLACEMENT.

Author: Ahmed Mohamed El-Nady
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN:
Category : Concrete dams
Languages : en
Pages : 388

View

Book Description