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ANALISIS ELEMEN HINGGA NONLINIER BALOK GESER BETON MEMADAT MANDIRI dan BETON MUTU TINGGI Effendi, Mahmud Kori; Rahmayanti, Novi
Teras Jurnal : Jurnal Teknik Sipil Vol. 11 No. 2 (2021): Volume 11 Nomor 2, September 2021
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v11i2.518

Abstrak Indonesia merupakan negara yang rentan terhadap bencana gempa bumi. Banyak rumah atau gedung di Indonesia dibangun dengan menggunakan material beton bertulang. Kerusakan geser pada elemen beton bertulang tersebut sangat berbahaya, hal ini dikarenakan kerusakan ini terjadi secara tiba-tiba dan biasanya terjadi secara eksplosif. Analisis nonlinier elemen hingga tiga dimensi balok beton memadat mandiri dan beton mutu tinggi dengan pemadatan mekanis dilakukan dengan software MSC Marc/Mentat. Baja dimodelkan dengan tertanam di beton. Kriteria kegagalan Linier Mohr-Coulomb digunakan untuk beton dan Von Mises untuk baja tulangan. Hasil kurva hubungan beban-lendutan untuk kedua balok beton memadat mandiri dan beton mutu tinggi pemadatan mekanis hampir sama dengan hasil kurva eksperimen di daerah elastic, namun setelah melewati fase elastik, kurva analisis berbeda sedikit dengan kurva eksperimen. Hasil analisis teoritis kekuatan beton hampir sama dengan hasil analisis elemen hingga balok beton tanpa tulangan. Hasil analisis kontak juga memperlihatkan terjadi kontak dan perlepasan pada bidang kontak baja tumpuan beban dan tumpuan balok dengan beton. Kata kunci: beton memadat mandiri, mutu tinggi, elemen hingga, MSC Marc/Mentat Abstract Indonesia is a country that is prone to earthquakes. Many houses or buildings in Indonesia are built using reinforced concrete material. Shear damage to reinforced concrete elements is very dangerous, because this damage occurs suddenly and usually occurs explosively. The nonlinear three-dimensional finite element analysis of self-compacting concrete beam and high strength concrete beam by mechanical compaction were carried out using the MSC Marc/Mentat software. Steel is modeled by being embedded in concrete. The Mohr-Coulomb Linear failure criterion is used for concrete and Von Mises for reinforcing steel. The results of the load- deflection curves for both self-compacting and mechanical compaction high-strength concrete beams are almost the same as those of the experimental curves in the elastic area, after elasticity, the analysis curve differs slightly from the experimental curve. The results of the theoretical analysis of the strength of the concrete are almost the same as the results of the analysis of the finite element concrete beams without reinforcement. The results of the contact analysis also showed that there was contact and detachment in the contact area of the load bearing steel and the beam support with the concrete. Keywords: self-compacting concrete, high strength, finite element, MSC Marc/Mentat

Kajian Parametrik Balok Beton Memadat Mandiri Menggunakan Analisis Nonlinier Elemen Hingga Effendi, Mahmud Kori; Rahmayanti, Novi; Fathurahman, Ilman
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2 (2021)
Publisher : Department of Civil Engineering, Diponegoro University

Self-compacting concrete has self-flowing, viscous and compact properties that minimize mechanical compaction. This concrete is suitable for solving the concrete pouring in the narrow and congested reinforcement. Beams made of both self-compacting concrete and normal high-strength concrete are analyzed by MSC Marc / Mentat software. Steel is modeled by being embedded in concrete. The failure criterion of Linear Mohr-Coulomb is used for concrete and Von Mises for reinforcing steel, respectively. Concrete and the plate support are modelled by 3D solid elements. For the steel, the truss element is used. The contact analysis is implemented between beam and both steel plate and steel supports. The load-deflection curve for both concrete are almost the same as the results of the experimental curve. The results of the contact analysis also showed that there were contact and separation in the contact area. The shear retention factor value close to one meaning will restrain greater loads. The results of the study on the reinforcement ratio also showed a reduction of 70% and an increase of 70% when using minimum and maximum reinforcement, respectively. The larger concrete cover also reduces the load that the beams can restrain.

ANALISIS ELEMEN HINGGA NONLINIER BALOK GESER BETON MEMADAT MANDIRI dan BETON MUTU TINGGI Mahmud Kori Effendi; Novi Rahmayanti
Teras Jurnal : Jurnal Teknik Sipil Vol. 11 No. 2 (2021): Volume 11 Nomor 2, September 2021
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v11i2.518

Abstrak Indonesia merupakan negara yang rentan terhadap bencana gempa bumi. Banyak rumah atau gedung di Indonesia dibangun dengan menggunakan material beton bertulang. Kerusakan geser pada elemen beton bertulang tersebut sangat berbahaya, hal ini dikarenakan kerusakan ini terjadi secara tiba-tiba dan biasanya terjadi secara eksplosif. Analisis nonlinier elemen hingga tiga dimensi balok beton memadat mandiri dan beton mutu tinggi dengan pemadatan mekanis dilakukan dengan software MSC Marc/Mentat. Baja dimodelkan dengan tertanam di beton. Kriteria kegagalan Linier Mohr-Coulomb digunakan untuk beton dan Von Mises untuk baja tulangan. Hasil kurva hubungan beban-lendutan untuk kedua balok beton memadat mandiri dan beton mutu tinggi pemadatan mekanis hampir sama dengan hasil kurva eksperimen di daerah elastic, namun setelah melewati fase elastik, kurva analisis berbeda sedikit dengan kurva eksperimen. Hasil analisis teoritis kekuatan beton hampir sama dengan hasil analisis elemen hingga balok beton tanpa tulangan. Hasil analisis kontak juga memperlihatkan terjadi kontak dan perlepasan pada bidang kontak baja tumpuan beban dan tumpuan balok dengan beton. Kata kunci: beton memadat mandiri, mutu tinggi, elemen hingga, MSC Marc/Mentat Abstract Indonesia is a country that is prone to earthquakes. Many houses or buildings in Indonesia are built using reinforced concrete material. Shear damage to reinforced concrete elements is very dangerous, because this damage occurs suddenly and usually occurs explosively. The nonlinear three-dimensional finite element analysis of self-compacting concrete beam and high strength concrete beam by mechanical compaction were carried out using the MSC Marc/Mentat software. Steel is modeled by being embedded in concrete. The Mohr-Coulomb Linear failure criterion is used for concrete and Von Mises for reinforcing steel. The results of the load- deflection curves for both self-compacting and mechanical compaction high-strength concrete beams are almost the same as those of the experimental curves in the elastic area, after elasticity, the analysis curve differs slightly from the experimental curve. The results of the theoretical analysis of the strength of the concrete are almost the same as the results of the analysis of the finite element concrete beams without reinforcement. The results of the contact analysis also showed that there was contact and detachment in the contact area of the load bearing steel and the beam support with the concrete. Keywords: self-compacting concrete, high strength, finite element, MSC Marc/Mentat

Analisis Elemen Hingga Berbasis Elemen Fiber Penampang Pada Kolom Beton Bertulang Mahmud Kori Effendi
Jurnal Teknik Sipil Vol. 15 No. 1 (2026): Volume 15 Nomor 1 Tahun 2026
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v15i1.1671

Reinforced concrete structures are among the most widely used construction types in Indonesia and have been proven to possess good resistance against seismic loads, particularly through the implementation of the Strong Column–Weak Beam (SCWB) concept, which requires column capacity to exceed that of beams. Concentrically loaded columns, which carry pure axial loads without bending moments due to eccentricity, play a crucial role in ensuring ductile structural behavior. Previous studies have shown that the compressive capacity of columns is influenced by the longitudinal reinforcement ratio, stirrup spacing and configuration, as well as cross-sectional shape. Closer confinement spacing can enhance compressive capacity, while variations in cross-sectional shape yield different structural responses. In this study, a finite element method based on the fiber element approach is employed to analyze the behavior of reinforced concrete columns under concentric axial loading. This method models the cross-section as uniaxial elastic–plastic fibers to capture nonlinear behavior in detail. The load–deflection curves from the fiber element analysis exhibit a trend closely matching the experimental results. Concrete stresses reached ultimate levels, while steel tensile/compressive stresses reached yield at mid-span of the column. The ultimate load values from both the analysis and experiments were greater than those prescribed by SNI 2847:2019.

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