On July 28

1976

aMs7.8great earthquake occurred in the southeastern part of Tangshan City

China

and it was a great earthquake with far-reaching effect in the 20 th century.The earthquake caused tremendous damages to all kinds of hydraulic enginering in Beijing-TianjinTangshan Region.Taking the region within isoseisms of Intensity VI located at longitude 115.5°-119.9°E and latitude 39.0°-40.9°N as study area

based on the results of a statistical analysis

typical seismic damage characteristics and failure types of the hydraulic engineering were given by illustration and tables with visual form.Some factors influencing the seismic damage of hydraulic engineering were analyzed

including ground motion intensity

local geology and site effect

water depth at reservoir upstream before earthquake

engineering structure design

material choice and so on.Finally

some useful practical measures for protecting hydraulic engineering were discussed

to serve the post-earthquake emergency danger removal and improve the seismic performance design of future hydraulic engineering in Beijing-Tianjin-Tangshan Region.