Limit states assessment for earthquake resistance of gravity dams based on crack propagation analysis

摘要

Ultimate States of a gravity dam were appraised by the extension of major cracks caused by seismic responses due to postulated earthquakes. A finite element dynamic analysis was carried out assuming smeared cracks and incorporating a tension-softening diagram for concrete. A new methodology was proposed to assess ultimate seismic performance of a gravity dam based on the relationship between the input earthquake acceleration and the residual ligament length of uncracked portion.