Static and Dynamic Analysis of Stress and Deformations of Răstoliţa Dam
Journal Title: Analele Universitatii "Dunarea de Jos" din Galati. Fascicula IX, Metalurgie si Stiinta Materialelor - Year 2016, Vol 39, Issue 4
Abstract
Large Dams are a particularly important case of seismic risk assessment. On the one hand, the dams themselves have a high value, having implications for the whole economy, through the production of electricity, water supply systems for irrigation and flood prevention etc. On the other hand, structural damage of a dam can lead to major disasters, the population exposure to effects caused by sudden floods. The situation in Romania is such that attention should be paid to the future safety of existing dams. The first reason is that these dams were designed and constructed on the basis of technical rules, which the majority are no longer in force; a second reason is the major climate changes in the last period, which have led to the accumulation of a large volume of water in increasingly large lakes. A third reason is, logically, the length of existing dams. In this paper is analysed the stress - deformation state that occurs in Răstoliţa dam body according to the type of rockfill; calculations were done for two cases, namely the completion of construction and, respectively, at the first filling of dam with water. The results show that after completion of construction, the maximum settlement is recorded in the central area of the dam, below the middle third; horizontal displacements of downstream prism are significantly higher compared to deformations of the upstream prism, in the area where the used material has a higher compressibility. Maximum principal normal stress registers some local distortions within acceptable limits; minimum principal normal stress presents important gradients in the contact zone downstream dam slope in the Ist stage with tuff-pyroclastic embankment layer and also in the first three layers of intercalated filling disposed near the slope. Stress increases due of hydrostatic pressure after the first filling does not lead to occurrence of stress concentrations in other zones than those reported at the completion of construction.
Authors and Affiliations
Mihaela TODERAŞ, Ciprian DANCIU
The Eco-Efficiency of Recycling Organic Waste for Agriculture Purposes
One of the problems of the cities is the raising of household waste, with polluting effects on the environment. On the other hand, in agriculture, through specific activities necessary to ensure food, fertilizers are nee...
Study on the Use of Oxygen-Enriched Combustion Air at the Ignition Initiator Furnace from the Agglomeration Machine
Comparative study on the use of oxygen-enriched combustion air at the homogenization coal ignition coil from Dwight-Lloyd agglomeration No 5 from the ArcelorMittal Galati metallurgic plant to reduce fuel consumption, inc...
The Steam - Secondary Source of Energy in Metallurgy
The paper is focused on a study of how to use the steam from recovery boilers of LD converters to produce electricity in turbine generators and heat in a heat network.
Management of the Environmental Risks Identified in an Organization
Response to risk is a process that is directly involved in risk management and is governed by the organization's security strategy, environmental characteristics and security mechanisms. The management identifies the opt...
Influence of Steel Modification Allied with 4-7%Si on Macrostructure
The goal of this paper is to test the effect of odification process of liquid steel with 4-7% silicon content, in the course of pouring out from steel-smelting furnace into ladlet, on macrostructure. The research settle...