Dam shape built to store water has failed with resulting loss of life, social, monetary and environmental losses due to seismic vibrations. those vibrations are dynamic in nature. these vibrations should be decreased with right application of engineering standards and for estimating the conduct of concrete gravity dam dynamic evaluation plays an high-quality function. This paper presents the dynamic time records evaluation and response spectrum method of a concrete gravity dam by means of using STAAD-seasoned. here Finite detail approach is used to research the dam. A concrete gravity dam version is ready in STAAD-seasoned to perform the time records analysis and response spectrum evaluation and a comparison is carried out between each these strategies. Concrete gravity dam is a massive shape which retains a completely huge quantity of water on its upstream facet and it is very critical for a dam to continue to exist towards vibrations of earthquake. So it is a depend of examine to check the behaviour of a dam in the course of and after the software of the loading.
Dams have contributed to the development of civilization for a long term. they’ll preserve to hold their importance in enjoyable the ever increasing demand for strength, irrigation and ingesting water, the protection of guy, assets and surroundings from catastrophic floods, and in regulating the glide of rivers. Gravity dams are very popular in these days. The dam body is designed in any such way that to withstand water pressure, silt strain, uplift stress with weight of the dam [1] . There are numerous factors affecting the dynamic response of concrete gravity dams to earthquake floor motions. some of them are the interaction of the dam with the inspiration rock and water in reservoir, sediment gathered at the bottom of reservoir, and non-linear behavior of dam concrete. STAAD-pro is ordinarily designed to offer guide for gaining knowledge of the principles of structural balance evaluation of gravity dams. it is able to also be used for studies and improvement on balance of gravity dams. In adopting numerous global posted dam protection guidelines, a huge range of modelling options had been carried out regarding (a) crack initiation and propagation, (b) outcomes of drainage and cracking beneath static, seismic, and publish-seismic uplift pressure situations, and (c) safety evaluation codecs [2] . The fundamental objective of seismic design is to offer systems with appropriate safety margins in opposition to failure whilst it is subjected to strong earthquakes. in the finite detail method, the answer vicinity is considered as constructed up of many small, interconnected sub areas called finite elements. due to the fact that it’s miles very difficult to discover the precise reaction of complicated shape under special loading situations, the shape is approximated as composed of several pieces inside the finite element version [3] . Concrete dams are among high importance systems, concerning requirements for continuous service at some stage in their lifetime, and catastrophic results in cases of probably dam failure. therefore, the protection of those structures should be investigated pretty severely by logical and specific methods. With the development of knowledge in earthquake engineering and the development of more reliable strategies for estimating earthquake magnitudes at distinctive websites, techniques for the seismic evaluation of systems are being advanced that include the consequences of more complicated parameters inside the evaluation and seismic hazard evaluation of structures.
the main goal of this paper is to look at the seismic behaviour of concrete gravity dam. consistent with the Indian preferred code of practice dynamic analysis shall be achieved for dam with top extra than a hundred m [4] . in this paper, two dams of top under the a hundred m that is 70 m and ninety m and dam of height above one hundred m this is one hundred ten m were analyzed by the usage of the reaction spectrum and time records evaluation, primarily based on IS codes and also to go test whether dynamic evaluation is necessary or now not for the dam of peak below a hundred m. And the effects acquired are as compared sooner or later to determine the structural overall performance of concrete gravity dam. response spectrum and time records evaluation play an superb function. In time records evaluation time acceleration as an input records with acceleration with appreciate to time. Time records evaluation affords the various mode shapes and route of structure which varies as in keeping with unique time-acceleration characteristic and these mode shapes varies as dynamic structural response under diverse loading. After the dynamic analysis it can be effortlessly anticipated whether or not the shape will continue to exist or now not underneath the impact of seismic vibration. The info of the have a look at and its result are described in brief within the following segment of the paper.