LABORATORY MODEL TESTING FOR EARTHQUAKE LOADING

Two types of facilities used at the University of California, Berkeley, for laboratory syudy of earthquake response characteristics of typical structures are described: (1)A 20-ft square shaking table; and (2)a variety of controlled loading devices. Shaking table tests of a 0.7 scale concrete building frame, a 1/30 scale highway overcrossing, and a 1/3 scale liquid storage tanks are mentioned. Controlled loading facility testing of concrete and steel members, joints, and subassemblages is described and typical results presented to demonstrate typical behavior mechanisms. Note that loading rate has only a minor influence on the behavior of concrete specimens, so earthquake response behavior can be evaluated by pseudo-static testing procedures. Other comparative advantages and disadvantages of the two types of testing facilities are presented.