Author(s)

A.C. Singhal

Abstract

Retrofitting of large water retaining structures to withstand earthquakes A. C. Singhal Department of Civil Engineering, Arizona State University, USA Abstract In many parts of the world, large water-retaining structures, including dams, were built during 1910-1960. Many of these dams have experienced alkali-silica reactions within the concrete and also have exhibited a lack of bonding stresses across horizontal construction lift surfaces. This is a result of using old construction techniques. With advancement of knowledge in earthquake engineering, these dams have been found to fail the modern seismic safety criteria. All such structures must now be analyzed for gravity-, reservoir-, temperature-, and earthquake-induced loads. The author has carried out several studies on different dams and has found that many dams are unsafe for earthquake conditions. Several methods for retrofitting exist, including strengthening of the dam by the use of epoxy-coated post-tensioning

Keywords