Large dams, especially concrete dams, have been designed against earthquakes since the construction of Hoover dam in the 1930s. The design criteria and methods of analysis used in those times are outdated today and the actual seismic safety of these structures is not known in view of today’s requirements. Earthquake action was usually taken into account pseudostatically, through an inertia forc...

Many single or multispan arch bridges are strengthened with the addition of some kind of structural support between adjacent arches of multispan or beside the arch barrel of a single span to increase the strength of the overall structure. It was traditionally formed by either placing loose rubble masonry blocks between the arches and beside the arches or using mortar or concrete to construct a ...

Abstract The dam is considered a huge structure that has multiple purposes in the life of human. most important role production electricity, and storage quantity water. Therefore, it very to be vigilant studies made for it. Lebanon indeed been designated as seismicity country. However, number dams increasing due several natural consideration. Mseilha an executed medium arch dam, which faced pro...

After some initial trials with RCC the first 3 RCC dams were constructed almost simultaneously. The Zaaihoek Dam and De Mistkraal Weir were designed and constructed by DWAF while the Arabie Dam, now called Flag Boshielo Dam, was designed by a consultant and constructed by a contractor for the then Leboa Homeland Government. The latter, a composite dam with a concrete spillway and an embankment ...