DYNAMIC PRESSURE WAVE ACTION IN ZONES OF WEAKNESS IN DAMS TRIGGERED BY EARTHQUAKE-IMPACT-LOADING IN THE RESERVOIR

摘要

Dam constructions are designed and constructed in view of strictest safety aspects for all static and dynamic load cases. As however the experience shows, formation of cracks in the "homogeneous concrete" as well as unsatisfactory compound behaviour of lift joints are not to be excluded. These zones of weakness especially on the upstream side of the dam-exposed to high water pressure (static and dynamic) represent an increased risk of safety. The main investigation, apart from the computation of the dynamic effects on the dam as a global structure, focuses on the stability analysis of a pressure-water filled crack configuration as a local, structure internal problem. A Fracture Mechanics based analysis shows an excessive potential of damage for the afflicted structure.