PERBANDINGAN KINERJA STRUKTUR KOLOM BULAT DAN KOLOM PERSEGI BETON BERTULANG TERHADAP BEBAN GEMPA DENGAN ANALISIS PUSHOVER

(Studi Kasus : Gedung Balai Diklat Keuangan Denpasar)

Abstract

Column is a vertical structural element that functions to absorb axial loads and transfer them to the foundation. The structure of this column consists of reinforcement and concrete which is a combination of tensile and compression resistant materials. The column carries a combination of axial loads and ultimate moments simultaneously. The column must have strength where the strength of the column must exceed the working load. The purpose of this study was to obtain differences in the performance of reinforced concrete building structures using circular and square columns due to earthquake loads. The research method used is a quantitative method with the help of SAP2000 software with nonlinear Pushover analysis. There are two models in this study, namely Model M1 is a square column model and model M2 is a circular column model. The results of the analysis show that the behavior of the structure for lateral deformation in the X direction of the square column is stiffer than the round column, while the lateral deformation in the Y direction of the circular column is stiffer than the square column. This is influenced by the inertia of the cross-section and the number of columns in each direction is different. The forces in the square column are 1% greater, the shear force is 62% smaller and the axial force is 24% greater than the circular column. The square column model with IO performance level has the ability to accept lateral loads and deformations on a larger capacity curve compared to circular columns for X and Y direction earthquakes.