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Detailed investigations and finite element analysis of Idukki dam in India
Published in Jean-Pierre Tournier, Tony Bennett, Johanne Bibeau, Sustainable and Safe Dams Around the World, 2019
V.V. Arora, B. Singh, P. Narayan, B.K. Patra
The main objective of this paper is to highlight the findings of various material properties of Idukki dam, use the actual material and other input parameters establish confidence in the numerical modelling by tallying dam behaviour through outcome of FEM model through instrumentation monitoring. This dam suffered a continuous upstream deflection from beginning of 1982 along with signs of minor distress. That was the reason to undertake a comprehensive examination of dam’s physical conditions and unusual behaviour including the 3-D numerical modelling of dam by using the ABAQUS FEM software. Arch Dam in this case study is double curvature large thin arch dam, which features horizontal as well as vertical arches; the geometry of this type can be accommodated in nearly all asymmetric valley shape. The 3D numerical model consisted broadly two model i.e. continuum and dis-continuum model - the first one without any vertical block joints and the latter one with vertical block joints. Both models include the exact simulation of the geometric, material behaviour and boundary condition of the dam using ABAQUS package. The effects of temperature change in an arch dam are often a major part of the design considerations. Especially in the smaller dams, the stresses caused by temperature changes can be larger than those from the reservoir loading. The effects of temperature change depend on the thermal properties of the concrete [7].
Multidisciplinary analysis of combined flow-like mass movements in a catchment of Southern Italy
Published in Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards, 2021
L. Cascini, S. Cuomo, A. Di Mauro, M. Di Natale, S. Di Nocera, F. Matano
On 9 September 2010, a great part of Salerno Province territory was affected by an intense rainfall of short duration, occurring between 17:00 and 21:00. The highest rainfall peak occurred between 18:00 and 19:00. Infrared thermic channel of significant satellite images, obtained from the provided by Italian Civil Protection (CEMPID 2010), show the evolution of the meteoric event from 16:00 to 19:00. After CEMPID (2010) images the rainstorm came from an E-SE direction and clouds hit against the western slope of Dragone catchment, the wider one in that asymmetric valley (Figure 1(b)). In this way, due to a hydrographic barrier effect, rainfall was very severe and concentrated in the catchment.