INVESTIGATION OF DYNAMIC BEHAVIOR OF UPLIFTING SLIDE SHOES BY SHAKE TABLE TESTS

Abstract

The Uplifing Slide Shoe (UPSS) is proposed as one of the methods for upgrading the seismic performance of continuous span bridges. To clarify the impact loads inherently associated with the use of planes for slope sections of the UPSS and dynamic behavior, a series of shaking table tests were carried out. The result shows that the relationship of the impact loads and collision velocity is almost linearly proportional, the ratio of horizontal load / vertical load can be explained by the sliding action, and the use of UPSS is quite effective in reducing maximum displacement of the girder under sinusoidal excitation. Based on the results of the test, a simplified mechanical model is proposed to represent and to predict the dynamic responses and impact loads. The mechanical model successfully provides the dynamic behavior of UPSS under cyclic and seismic excitation.