2015 CSCE Annual Conference Regina - Building on our Growth Opportunities

2015 CSCE Annual Conference Regina - Building on our Growth Opportunities Conference

Transient thermal analysis of a concrete spillway

Dr. Ali Nour, Hydro-Québec (Presenter)
Mr. Abdelhalim Cherfaoui
Mr. Gocevski Vladimir, Hydro-Québec
Mr. Andre Bergeron
Mrs. Sonia Tevi-Benissan
Mr. Frédéric Perreault

This paper presents a feasibility study of casting with 4.7 m concrete lift height as well as casting along the entire length of a chute of a concrete spillway. To this end, a detailed transient thermal analysis was carried out based on concrete heat of hydration and site conditions (wind, ambient temperature, etc.). Using this analysis, a representative temperature profile was determined and , in a subsequent mechanical analysis, was combined with other types of loads in the analyses made for steel reinforcement design. The transient thermal analysis was conducted based on a realistic construction scenario. Moreover, a detailed 3D finite element model was prepared and analysis was conducted - taking into account thermal concrete-rock contact - using Abaqus Standard solver. Two scenarios corresponding to two concrete lift heights were examined : (i) the standard height of 2.3 m (current practice), and (ii) the desired 4.7 m height which significantly enables the reduction of casting time and associated work. Results obtained from the two scenarios are presented and compared. This study demonstrates the benefits of the advanced numerical tools for rational design of strategic hydraulic structures.