Journal of Seismology and Earthquake Engineering

Journal of Seismology and Earthquake Engineering

Preliminary Assessment of the Operational Dam's Performance in November 12, 2017 Sarpol-e Zahab Earthquake

Document Type : Geotechnical Earthquake Engineering

Authors
Abdollah Sohrabi-Bidar 1
Farhad Imanshoar 2
Shahram Maghami 1
Malek-Mirza Darvishi 3
1 University of Tehran
2 Iran Water Resource Management Company
3 Kermanshah Regional Water Company
10.48303/jsee.2018.240796
Abstract
Following the November 12, 2017 Sarpol-e Zahab earthquake with a magnitude of 7.3 in Richter scale, emergency inspection of dams has been performed for dams located at the epicentral distance of 125 km, according to the ICOLD recommendations. In the mentioned zone, there are 16 impounded operational storage dams. Inspected dams had no apparent significant damages and only some thin cracks had been observed in Tange-Hamam Dam that is a non-homogenous embankment dam and the closest operational dam to the epicenter of the earthquake, with a distance of 25 km from the epicenter. There were some defects such as longitudinal cracks and some tiny transversal cracks on the crest of the dam as well as some vertical cracks in the spillway's left approach wall. Regarding the observed evidence, more precise investigations of the dambehavior were performed through the instrumentation data. Settlement measuring on magnetic plates shows the settlement of 13 cmnear the embankment surface at the middle of the damcrest, which is about 0.22 of the dam height. This rate of strain has been compared with some published international experiences, which generally shows the acceptable performance of the dam. To ensure the safety of the dam, monitoring of all instruments should be continued, as well as the precise geodetic measuring in the dam body, which is in progress now.
Keywords
Sarpol-e Zahab earthquake
Tange-HamamDam
Instrumentation data
Dam settlement
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  • Receive Date 18 August 2018
  • Accept Date 26 December 2020
  • Publish Date 01 October 2018