EVALUASI KINERJA STRUKTUR GEDUNG BERDASARKAN METODE SPEKTRUM KAPASITAS (ATC-40) DAN TARGET PERPINDAHAN MODIFIKASI (FEMA 440)

Abstract

: Structural performance analysis is a post-elastic structure analysis method that aims to obtain the maximum base shear force and the maximum displacement of the building structure. In this paper, the results of the evaluation of the performance of the building structure that has been designed as a four-story apartment with an open frame system located in Malang, East Java. This building is designed with earthquake loads using response spectrum based on the Indonesian earthquake map. The structural performance analysis method was carried out referring to the Capacity Spectrum method (ATC-40) and the Modified Target Displacement method (FEMA 440). The results of the performance analysis based on the Capacity Spectrum approach and Modified Displacement Target both show the same level of performance, namely Immediate Occupancy (IO). However, the existing condition of the structure at the performance point or performance level there are several structural elements experiencing plastic hinges Collapse (C). This shows that the performance of the structure has not met the criteria for ATC-40 and FEMA 440. So, it is necessary to make improvements to the collapsing (C) structural elements so that the performance level is in accordance with the ATC-40 and FEMA 440 methods.