Time History Analysis of Concrete Gravity Dam with Gallery and Dam without Gallery by Using STAAD.Pro

Abstract

Concrete Gravity Dams are important lifeline structures and represent the fragrance of people’s standard of living. Dam structures that span navigable waterways are inherently at a risk for seismic vibrations and as such they must be designed to resist these vibrations. These are very complex structures and subjected to various types of forces both static and dynamic in nature. However, these earthquake vibrations are fundamentally dynamic in nature and a static analysis procedure may not be adequate in designing hydraulic structures like Dam. This paper presents the dynamic time history analysis of a concrete gravity dam by using STAAD-PRO. Here Finite Element Approach is used to analyze the dam. A concrete gravity dam model is prepared in STAAD-PRO to perform the time history analysis and a comparison is done between dam with gallery (i.e openings) and dam without gallery (i.e openings).Seismic analysis is performed for both dam with gallery (i.e openings) and dam without gallery (i.e openings). Various basic loads and load combinations are used in analysis of concrete gravity dam according to IS 6512:1984 Table 1 represents basic loads and load combinations used during the analysis.