2020 Volume 20 Issue 4 Pages 4_18-4_37
This study quantitatively verifies the “slide effect” for warehouse buildings with reinforced concrete (RC) column-steel beam (RCS), the usage of which has increased in recent years. The slide effect not only reduces the maximum displacement of the frame and the maximum acceleration of the load by the way of load sliding (both also referred as responses), but it also has the potential to reduce variation in these responses. In this study, analysis models of warehouse buildings with RCS were developed. One hundred artificial seismic waves created based on the provisions of the Japanese Building Code (JBC) were used as input for the models, and parameters such as average value, coefficient of variation, and confidence interval were calculated using loading rate, multiplying factor, and capacity reduction factor. The analysis results confirmed that the RCS structure has a slide effect equivalent to or better than that of the S structure. The slide effect was found to be the highest in the case of a warehouse building with a high loading ratio and a large ultimate lateral strength, under the conditions of a moderate earthquake. The slide effect was quantitatively expressed by converting it into an equivalent additional damping factor. The slide effect not only confirmed reduction in the variation of the maximum response value in many layers, but also that it had the effect of equalizing the maximum story drift of each layer when a warehouse building was subjected to a seismic input motion defined by the JBC as a large earthquake.
