Abstract
As the third part of five serial reports, the test data of series-2 are shown in this paper. Loading system and computer system to controll it were more refined in conducting the series-2 than in series-1 reported in the previous paper. Test variables were initial natural period, intensity of the ground motion and column axial stress. Through the On-line test series-1 and series-2, it is found a) that the computer-actuator On-line system is a feasible method to simulate experimentally the earthquake response of reinforced concrete building frames and b) that the computer program OS-1 D can approximate well to the On-line simulation.