The IUP Journal of Structural Engineering
An Analysis of Gravity Dam Using ANSYS

Article Details
Pub. Date : Apr, 2020
Product Name : The IUP Journal of Structural Engineering
Product Type : Article
Product Code : IJSE10720
Author Name : Nagaraj S Kumbar, V B Sulebhavi
Availability : YES
Subject/Domain : Science and Technology
Download Format : PDF Format
No. of Pages : 27

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Abstract

The section of gravity dam is so designed and shaped that its weight is sufficient to ensure stability against the effects of all imposed forces. The important complex factors that affect the stability of the dam are traditional calculation methods and mechanics of materials. These take a lot of time in the calculation and thus cannot give a more comprehensive analysis. So, the finite element simulation technology is widely used. Based on this, there exist many kinds of software of the finite element, and ANSYS software is one of them. In this paper, an effort has been made to apply various concepts to the actual size of "Bellary Nala Irrigation Project (Belagavi)" dam. The first step of simulation is aimed at validating the models developed by comparing them with manual results. By Finite Element Analysis (FEA), a two-dimensional Finite Element Model (FEM) of a gravity dam is proposed using Ansys APDL18.2. Dams with full reservoir and empty reservoir conditions are analyzed. Normal stress, principal stress, shear stress and deflection along the crest of the dam are observed. It is observed that when the reservoir is empty, the direction of vertical acceleration does not have a significant role in the stress distribution results, but it affects the displacement of the crest of the dam. The stresses developed with flexible base are more than that of rigid base. Also, when the reservoir is full, the openings in the dam induce higher stresses.


Description

A gravity dam is a solid structure, made of concrete or masonry, constructed across a river to create a reservoir on its upstream. The section of the gravity dam is approximately triangular with its apex at its top and maximum width at bottom. The section is so designed and shaped that its weight is sufficient to ensure stability against the effects of all imposed forces. This type of structure is most durable and solid, and requires very little maintenance. Such dams may be constructed of masonry or concrete. However, concrete gravity dams are preferred and mostly constructed these days.


Keywords

Gravity dam, Gravity method, Finite Element Analysis (FEA), ANSYS APDL18.2, Drainage gallery

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