The behavior of slab on pile structure with a variation of support end interconnection under earthquake load according to the SNI 2833:2016

Abstract

This paper discusses the behaviour of the slab-on-pile (SOP) structure with variations support end interconnection under earthquake loads. Analysis of the SOP structure using macro modelling of numerical analysis. The SOP structure model is developed with three variations of the model with different support conditions, namely Model 1 with the end of the structure attached to the pile head and spun pile, Model 2 with the end of the structure attached to roller support, and Model 3 with the end of the structure not being supported, or the same as the cantilever system. Earthquake load is assigned using two methods according to SNI 2833:2016, namely the Single-mode Spectra Method and the Response Spectrum Method. Based on the analysis results, the vibration period of the SOP structure calculated by the single mode spectra method is 0.60 seconds for the first mode and 0.34 seconds for the second mode. Based on the numerical analysis results, the vibration period of Model 3 is greater than that of other models. The maximum internal forces and the most significant displacement occur in Model 3, while the most considerable base reaction occurs in Model 1. The magnitude of the base shear force occurs because Model 1 uses more piles, thus increasing the stiffness of the structure. This results in an increase in seismic forces but reduces displacement of the structure. Furthermore, for the analysis and design of SOP structures, Model 3 is the most reliable because this model produces the maximum load effect and the most significant displacement of the structure.