Download or read book Base Sliding Response of Concrete Gravity Dams to Earthquakes written by Anil K. Chopra and published by . This book was released on 1991 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Earthquake Analysis and Response of Concrete Gravity Dams Including Base Sliding written by Juan W. Chavez and published by . This book was released on 1994 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonlinear Earthquake Analysis of Concrete Gravity Dams Including Sliding written by Juan Walter Magno Chávez Zegarra and published by . This book was released on 1993 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Performance Analysis of Concrete Gravity Dams written by Gaohui Wang and published by Springer Nature. This book was released on 2020-07-10 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Earthquake Engineering for Concrete Dams written by Anil K. Chopra and published by John Wiley & Sons. This book was released on 2020-03-16 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive guide to modern-day methods for earthquake engineering of concrete dams Earthquake analysis and design of concrete dams has progressed from static force methods based on seismic coefficients to modern procedures that are based on the dynamics of dam–water–foundation systems. Earthquake Engineering for Concrete Dams offers a comprehensive, integrated view of this progress over the last fifty years. The book offers an understanding of the limitations of the various methods of dynamic analysis used in practice and develops modern methods that overcome these limitations. This important book: Develops procedures for dynamic analysis of two-dimensional and three-dimensional models of concrete dams Identifies system parameters that influence their response Demonstrates the effects of dam–water–foundation interaction on earthquake response Identifies factors that must be included in earthquake analysis of concrete dams Examines design earthquakes as defined by various regulatory bodies and organizations Presents modern methods for establishing design spectra and selecting ground motions Illustrates application of dynamic analysis procedures to the design of new dams and safety evaluation of existing dams. Written for graduate students, researchers, and professional engineers, Earthquake Engineering for Concrete Dams offers a comprehensive view of the current procedures and methods for seismic analysis, design, and safety evaluation of concrete dams.
Download or read book Earthquake Engineering for Concrete Dams written by National Research Council and published by National Academies Press. This book was released on 1991-02-01 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hazard posed by large dams has long been known. Although no concrete dam has failed as a result of earthquake activity, there have been instances of significant damage. Concerns about the seismic safety of concrete dams have been growing recently because the population at risk in locations downstream of major dams continues to expand and because the seismic design concepts in use at the time most existing dams were built were inadequate. In this book, the committee evaluates current knowledge about the earthquake performance of concrete dams, including procedures for investigating the seismic safety of such structures. Earthquake Engineering for Concrete Dams specifically informs researchers about state-of-the-art earthquake analysis of concrete dams and identifies subject areas where additional knowledge is needed.
Download or read book Earthquake Analysis and Response of Concrete Gravity Dams written by Gregory L. Fenves and published by . This book was released on 1984 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Earthquake Response of Concrete Gravity Dams Including Hydrodynamic and Foundation Interaction Effects written by Anil K. Chopra and published by . This book was released on 1980 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Reliability Analysis of Base Sliding of Concrete Gravity Dams Subjected to Earthquakes written by Tomas Horyna and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reliability Analysis of Base Sliding of Concrete Gravity Dams Subjected to Earthquakes written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EAGD SLIDE written by Juan W. Chávez and published by . This book was released on 1994 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Earthquake Response of Concrete Gravity Dams written by Gregory L. Fenves and published by . This book was released on 1984 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Behavior of Cracked Concrete Gravity Dams written by Xueye Zhu and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two models are proposed to analyze the seismic behavior of cracked concrete gravity dams in order to assess the safety against sliding and overturning. A proposed rigid model first designed for cracked concrete dams considers the geometry of the cracked dam and includes all possible modes of motion with 3 degrees-of-freedom. The other model proposed is a flexible finite element model, which represents a penalty approach, based on the incremental displacement constraint equations between the nodes on both sides of the crack. All governing equations and corresponding conditions for every mode of motion are derived for the rigid model. Verifications show that this simple rigid model is effective in the prediction of the seismic response of cracked dams. Its applications to the cracked Koyna Dam and a typical dam cracked at the base demonstrate its advantages of simplicity, accuracy and ability to reveal the important features of seismic behavior of cracked concrete dams. The flexible model is verified with available solutions, showing its very good applicability in estimation of the dynamic response of cracked concrete dams, owing to its adequate treatment of contact conditions at the crack. Its applications to Koyna Dam and a typical dam prove its adequacy to the cases of cracks at both the base and at a height. Computations with both proposed models show that the cracked Koyna Dam and the cracked typical dam are safe under the earthquakes considered provided the effective coefficient of friction is sufficient large. However, both models suggest that the rocking mode must be considered since it affects the sliding displacement even if the rocking itself is very small. The partial dam above the crack might experience drifting if severe impact occurs. Therefore even a large coefficient of friction cannot prevent sliding. The residual sliding displacement along the crack for a specific cracked dam depends on factors such as coefficient of friction, water level, peak acceleration of earthquake and its details. The consistency of two proposed models is noted when increasing the stiffness in the flexible model. This suggests that the rigid model is applicable to the case when the upper part of the cracked dam is very stiff, while the flexible model is capable of revealing more details of the seismic behavior of cracked dams.
Download or read book Scrutinizing the Response of Concrete Gravity Dams to Earthquake Loading written by Biju P N and published by Mohd Abdul Hafi. This book was released on 2024-04-02 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dams are constructed for storing water for the irrigation, water supply, generation of electricity or combination of above. The civilization starts from the bank of rivers and human beings thought of storage of water as it is the basic need of human beings. The dry and wet season of the nature forced for the construction of dams. As the society develops, the requirement of water becomes an essential part of human life. It also becomes a part of basic need of industrial development. Hence more thinking in that field leads to the construction of more dams. The dams in earlier period were constructed of earth and it has its own limitation and it is difficult to satisfy the stability criteria and more susceptible to overtopping. Then turned to the masonry construction. Due to the limited material availability and the huge cross section, masonry dams also have limitations. After the invention of cement, more concrete gravity dams were constructed for the storage of huge quantity of water. At the infant stages the design consideration was based on simple static analysis. But in real situation ground acceleration are happening due to the earthquakes. This may cause failure of dam structures. Hence more study was initiated in that field for understanding the behaviour of dam structures to earthquake loading. Though dynamic analysis and design has given the answer to the safety aspects of concrete gravity dams to a certain extent, but still pending more to explain. The dam
Download or read book Simplified Analysis for Earthquake Resistant Design of Concrete Gravity Dams written by Gregory L. Fenves and published by . This book was released on 1986 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EAGD 84 written by Gregory L. Fenves and published by . This book was released on 1984 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonlinear Earthquake Response of Concrete Gravity Dams written by N. Pal and published by . This book was released on 1974 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: A mathematical model is proposed for the mechanical properties -- constitutive relation and strength -- of concrete subject to dynamic cyclic reversible stresses and strains that may occur in gravity dams subjected to earthquake ground motion. The model describes properties of concrete under a two-dimensional state of stress. The effects of strain rate -- the time rate of change of strain -- on the mechanical properties are incorporated in the model. Experimental results available in the literature form the basis for the proposed model. A method is developed for nonlinear analysis of response of concrete gravity dams to earthquake ground motion wherein mechanical properties of concrete are defined by the mathematical model mentioned above. Earthquake analyses reveal that cracking of concrete is confined to areas near the upstream and downstream faces of dams -- especially in the upper parts and in some cases also near the heel. The estimated cracking is very sensitive to the assumed tensile strength.
