2023 Volume 79 Issue 13 Article ID: 22-13025
A single spherical sliding bearing is a seismic isolation bearing in which a slider slides on a concave sphere under the influence of friction, and its friction has a sizeable impact on the dynamic behavior of a structure. The spherical sliding bearing has a dependency on velocity, temperature, and surface pressure. In order to understand the dynamic behavior of a structure having single spherical sliding bearings, it is necessary to clarify the influence of different frictional coefficients of the sliding surface on the dynamic response, and frictional characteristics should be appropriately evaluated and incorporated into the dynamic analysis. In this study, shaking table tests were conducted using two different types of sliders with different frictional coefficients, low and medium frictions, and dynamic analyses were conducted considering the dependency of the frictional coefficients on each type of slider. As a result, it was confirmed that the acceleration and displacement responses were smaller for the low-frictional type than the medium one due to the effect of friction. The experimental results were simulated with relatively high accuracy by considering the velocity dependency.
