2018 Volume 18 Issue 2 Pages 2_1-2_14
Although the seismic response reduction effect with load sliding (slide effect) is not considered in general structural design, consideration of this effect may contribute to a more rational structural design. In the present study, in order to obtain the basic characteristics of the slide effect for an elastoplastic frame, shaking table tests were carried out on a single-story elastoplastic steel frame while varying certain parameters. In addition, the vibration energy due to deformation of the frame, the sliding energy generated by the sliding of the weight, and the input energy were calculated from the experimental results, respectively. Based on the experimental results, the vibration energy of the frame and the input energy were found to decrease due to the occurrence of friction energy by the sliding of the weight. The seismic response analyses were carried out for the analytical models considering the slide effect in order to calculate and discuss the energy balance of the hysteresis energy of the frame, the friction energy of the weight, and the damping energy. Based on the analytical results while varying the same parameters as the experiment, the friction energy of the weight was found to be strongly influenced by the characteristics of the input seismic motions. However, the ratio of the friction energy to the input energy is roughly constant for the seismic motions of which maximum velocity is 0.3 ~ 0.5m/s.
