207 REKAYASA SIPIL / Volume 13, No.3 – 2019 ISSN 1978 - 5658 ANALISIS PERILAKU RETROFIT KOLOM BETON BERKOMPOSISI STEEL FIBER (ENGINEERED CEMENTITIOUS COMPOSITE / ECC) AKIBAT BEBAN AKSIAL DENGAN MENGGUNAKAN SOFTWARE BERBASIS FINITE ELEMENT ANALYSIS Bagas Rahmanduta Subchan 1* , Gati Annisa Hayu 2 , Entin Hidayah 2 1 Mahasiswa, Program Studi S-1 Teknik Sipil, Universitas Jember 2 Dosen, Jurusan Teknik Sipil, Universitas Jember *Korespondensi: subchanbagas@gmail.com ABSTRACT This study presents a simulation analysis of the non-linear behavior of retrofit concrete material due to uniaxial loads modeled in the form of cylinders measuring 150 mm in diameter and 200 mm in depth using the ABAQUS. Analysis of this auxiliary program includes cases of normal concrete retrofit, concrete with retrofit concrete with a composition of 1% steel fiber, and concrete with retrofit concrete composed of 2% steel fiber. From the results of the study conducted, it was shown that in modeling the properties of concrete damaged plasticity in ABAQUS, the use of accurate compressive behavior equations for concrete cases with normal concrete retrofit was core concrete and retrofit concrete using the Alfarah, et al equation. For the case of concrete with steel fiber composition retrofit, core concrete uses the Alfarah equation, and retrofit concrete uses Zhou Jiajia, et al. Whereas to model the tensile behavior accurately in the case of concrete with normal concrete retrofit using the Alfarah, et al equation. And the case of concrete with retrofit steel fiber compositions using the CEB-FIB equation and the Ali & Nehdi equation. The results of ABAQUS analysis of force vs. displacement show a graphical pattern close to the similarity of retrofit concrete column experimental results ECC1 error force ratio and displacement 14.86% and -10.60%, and ECC2 14.82% and 8.01). Based on the stress analysis shows that there is a gradual increase in core concrete where the peak of stress is found in the core area of the concrete core and in the retrofit area is divided into two regions, namely stressing on the center and pulling on a small part of upper and lower column retrofit. Keywords: behavior of materials, retrofit, concrete column, finite element analysis 1. PENDAHULUAN Pemahaman mengenai perilaku struktural material pada umumnya diperoleh dari hasil pengujian eksperimental di laboratorium. Uji eksperimental ini termasuk bagian penting dalam penelitian dikarenakan menghasilkan respon struktur dalam keadaan sesungguhnya. Di sisi lain, uji eksperimental memiliki kekurangan yaitu dibutuhkannya data pengujian yang sangat banyak agar mendapatkan hasil eksperimental yang akurat. Sehingga perlakuan ini membutuhkan biaya yang besar dan juga waktu yang panjang. Berangkat pada permasalahan tersebut maka dibutuhkannya suatu alternatif yang dapat memberikan kemudahan dalam pengerjaan yang menghasilkan perilaku struktural pada benda uji. Solusi alternatif tersebut yaitu dengan menggunakan analisa pendekatan simulasi metode numerik yaitu dengan metode elemen hingga atau FEM (Finite Element Method). Pendekatan dengan metode elemen hingga ini telah tersedia pada program bantu