Page - 1026 - in Book of Full Papers - Symposium Hydro Engineering

Fig. 5 Temperature fields observed in dam’s body in two stages of analysis The analysis comprises of the first filling period and a subsequent operation period until late January 2017. Actions due to water pressure and thermal variations were discretized fortnightly. 3.3. SOME RELEVANT RESULTS In Fig. 6 and Fig 7 the horizontal displacements observed over time (from July 2014 to January 2017) for the central plumb-line at elevations 233.10 m and 170.2 m, respectively, and the correspondent computed horizontal displacements, considering the effects of water pressure, thermal variations and creep, are represented. The great influence of the thermal variations on the structural response and the very good agreement obtained between observed and calculated displacements should be pointed out. Concerning the displacements values measured and computed in other points of the dam, good adjustments were also obtained. Fig. 8 shows the displacements measured and computed on the subvertical rod extensometer EF9, located downstream on the bottom of the central block 17-18 at 116.3 m elevation, from July 2014 to January 2017. In this case the agreement is not so good. The global shape of the displacements evolution over time is similar, but the monitored displacements are about twice the calculated ones. On most rod extensometers the adjustment achieved was better, but in some of them the adjustment was of the same type. For the data of other types of monitoring devices good agreements were also obtained, demonstrating the good performance of the dam and the adequacy of the models considered for the analysis and interpretation of the observed behaviour. 1026