Author(s):
Azenha, Miguel 
; Lameiras, Rodrigo ; Barros, Joaquim A. O. ; Costa, A.
Date: 2012
Persistent ID: http://hdl.handle.net/1822/21469
Origin: RepositóriUM - Universidade do Minho
Document details
Construction phasing of a dam spillway : thermo-mechanical simulation
Description
One of the most important issues to be taken into account while defining the construction phasing of massive elements, such as dams or thick walls, is the height of each construction stage. In fact, if the height of casting of each construction stage is increased, the temperature variations associated to heat of hydration are raised, with a consequent increase of concrete cracking risk. On the other hand, if the height of each construction phase is reduced, overall construction schedules are penalized, and costs are increased. The thickness of the concrete elements to be cast in each stage should be then as large as possible without causing thermal cracks. The evaluation of alternative construction scenarios and their cracking risk can be assessed with thermo-mechanical models. This paper aims to present an application of thermo-mechanical modeling to the central wall of a dam spillway entrance. The case study has added interest in view of the extensive material characterization, in-situ monitoring of temperature/strain, and the use of air-cooled pipes to reduce temperature increase in concrete.
One of the most important issues to be taken into account while defining the construction phasing of massive elements, such as dams or thick walls, is the height of each construction stage. In fact, if the height of casting of each construction stage is increased, the temperature variations associated to heat of hydration are raised, with a consequent increase of concrete cracking risk. On the other hand, if the height of each construction phase is reduced, overall construction schedules are penalized, and costs are increased. The thickness of the concrete elements to be cast in each stage should be then as large as possible without causing thermal cracks. The evaluation of alternative construction scenarios and their cracking risk can be assessed with thermo-mechanical models. This paper aims to present an application of thermo-mechanical modeling to the central wall of a dam spillway entrance. The case study has added interest in view of the extensive material characterization, in-situ monitoring of temperature/strain, and the use of air-cooled pipes to reduce temperature increase in concrete.
Document Type
Conference Object
Language English
Language English
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