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All Journal Jurnal Media Teknik Sipil Jurnal Teknik Sipil Semesta Teknika Jurnal Jalan Jembatan
Djoko Sulistyo
Fakultas Teknik Sipil dan Lingkungan - Universitas Gadjah Mada.
Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Perilaku Geser pada Keadaan Layan dan Batas Balok Beton Bertulang Berlubang Memanjang Krasna, Wiku A; Sulistyo, Djoko; Supriyadi, Bambang
Jurnal Semesta Teknika Vol 13, No 2 (2010): NOVEMBER 2010
Publisher : Jurnal Semesta Teknika

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Abstract

I cross-section of reinforced concrete reduces weight and concrete needs, but the reduction in strength is not considerably large. In addition, I section reinforced concrete beam is relatively complicated and takes much longer time for manufacturing. Another geometric cross-section which results in equivalent weight reduction with that of I cross-section concrete beam may be hollow square crosssections of reinforced concrete beams. This research was conducted to identify and compare the behavior of the shear and dynamic effects of hollow core reinforced concrete beam with an I cross-section beam that equivalent with its. The specimens being tested were four reinforced concrete beams, of 2000 mm length, consisted of a T beam with bottom flange as control beam (BK) possessing dimensions of bfa = 600 mm, bw = 125 mm, bfb = 200 mm, h = 300 mm, tf = 100 mm, and three hollow core T beams as tested beam (BB1, BB2 and BB3) possessing dimensions of bf = 600 mm, bw = 200 mm, blubang = 75 mm h = 300 mm, tf = 100 mm. Static loading was applied by means of a hydraulic jack in a four-point loading system, were. Dynamic loading test was carried out by vibrating the beams to obtain the natural frequency, where the vibrating load were produced by a mechanical vibrator. Whilst the data on the static load carrying capacity was recorded at the first crack and at each initial additional crack until the ultimate fracture, those on dynamic loading was recorded on the solid block, at the first crack and at yield. The parameters being used was the magnitude of deflection, strain of the reinforcing steel and concrete, crack pattern and natural frequency. It can be concluded that the hollow core reinforced concrete beam can be used as an alternative to I section reinforced concrete beam. It was noticed that the difference in shear load carrying capacity between control beam (BK) and hollow beam (BB) was not considerably significant, where the difference between BK (299.3 kN) and BB1 (337.6 kN) is 12.79%, that with BB2 (350, 6 kN) or 17.14%, and that with BB3 (289.4 kN) or −3.31%. The natural frequency of BK is 58.594 Hz, 15.769% larger than the natural frequency of BB3 with 49.354 Hz. The natural frequencies of tested beam decreased with the increased of damage to the beam.
Analisis Lentur Balok Penampang T Berlubang Memanjang Menggunakan Metode Elemen Hingga Non-linier Sukarno, Praganif; ".", Muslikh; Sulistyo, Djoko
Jurnal Semesta Teknika Vol 14, No 1 (2011): MEI 2011
Publisher : Jurnal Semesta Teknika

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Abstract

Numerical analysis is a time-, cost- and equipment-effective method to study the behavior of structures. ATENA is one of the available software-based on finite element method. Hollow cross section is one way to reduce the weight of concrete beam. The effect of holes on beam may reduce the bending resistance. The hollow beam was numerically modeled which and subsequently analyzed using the ATENA v.2.10 software. Material parameters being used as input data was obtained from laboratory tests, assuming that steel-concrete bond was prefect, and and the steel reinforcement was modeled as discrete. The results of numerical analysis of the ATENA were then compared with experimental test results on the flexural behavior and serviceability limit state of reinforced concrete hollow beams lengthwise (Amir, 2010), then study the variation of quality parameters of concrete and the hole size variations. The results shows that the collapse load of hollow beam reached only 96.71% and deflection reached 135.96%. Stiffness of hollow concrete beam was also showed a higher stiffness of the experiment. The crack pattern is flexural fracture and very much agree with that of the experiments. Test parameters of concrete quality variations as well as the hole size variation showed higher concrete quality/size of the hole will reduce the ductility of beam.
ANALISIS DAYA DUKUNG BEBAN BALOK BETON BERTULANG TAMPANG T DENGAN PERKUATAN WIRE ROPE PADA DAERAH MOMEN NEGATIF MENGGUNAKAN PROGRAM RESPONSE-2000 DAN METODE PIAS Haryanto, Yanuar; Satyarno, Iman; Sulistyo, Djoko
Jurnal Teknik Sipil Vol 13, No 3 (2015)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (608.913 KB) | DOI: 10.24002/jts.v13i3.873

Abstract

Abstrak: Response-2000 adalah suatu program yang dapat digunakan untuk menganalisis elemen beton bertulang akibat beban aksial, momen, geser, maupun kombinasi ketiganya sehingga respon beban-lendutan dapat diprediksi dan kekuatannya dapat diketahui. Makalah ini membahas perbandingan kapasitas daya dukung beban hasil pengujian balok bertulang tampang T yang diperkuat wire rope pada daerah momen negatif dengan analisis menggunakan Response-2000 dan metode pias. Metode pias dilakukan dengan cara membagi penampang menjadi sejumlah pias dengan ketebalan tertentu, kemudian menganalisis gaya-gaya yang bekerja sampai tercapai keseimbangan sehingga dapat ditentukan kapasitasnya. Analisis dilakukan terhadap 3 model balok tampang T, masing-masing 1 balok tanpa perkuatan, 1 balok diperkuat dengan 2 wire rope, dan 1 balok dipekuat dengan 4 wire rope. Jenis wire rope yang digunakan adalah Independent Wire Rope Core (IWRC) dengan diameter 10 mm. Hasil analisis menunjukkan bahwa kurva hubungan beban-lendutan untuk semua balok berdasarkan analisis Response-2000 memiliki pola yang mendekati kurva hubungan beban-lendutan hasil pengujian. Namun demikian terdapat perbedaan pada kemiringan kurva di mana hal tersebut dapat disebabkan oleh adanya anggapan lekatan sempurna (perfect bond) pada program Response-2000. Hal yang sama juga berlaku pada analisis metode pias. Daya dukung beban hasil Response-2000 menunjukkan rasio sebesar 1,05; 0,95; dan 0,89 terhadap hasil pengujian, masing-masing untuk balok tanpa perkuatan, balok diperkuat dengan 2 wire rope, dan balok dipekuat dengan 4 wire rope. Sedangkan kapasitas daya dukung beban hasil analisis metode pias menunjukkan rasio sebesar 1,05; 0,85; dan 0,76 terhadap hasil pengujian.
SIFAT MEKANIS BETON BERSERAT BAJA DENGAN METODE PENGERJAAN PRALETAK AGREGAT Randa, Sam; Satyarna, Iman; Sulistyo, Djoko
Jurnal Jalan-Jembatan Vol 30 No 2 (2013)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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Abstract

ABSTRAKJumlah serat yang dapat didapatkan kedalam beton yang berserat yang diaduk secara konvensional dibatasi dengan fenomena pengumpulan serat dalam pengadukan beton. Tulisan ini membahas metode alternatif pembuatan beton berserat yang indeks perkuatannya tinggi dengan cara praletak adukan agregat kasar dan serat. Hubungan indeks perkuatan serat terdapat beberapa sifat-sifat mekanis beton agregat-serat praletak dilaporkan secara rinci. Indeks perkuatan volumetrik serat dalam beton adalah 0%, 1%, 1,6% dan 2,0%. Sifat-sifat mekanis yang diteliti mencangkup cepat-rambat getaran ultrasonik, modulus elastisitas, kuat tekan, kuat takir-lentur dan keuletan. Sifat-sifat fisis beton meliputi kerapatan massa, penyerapan air, dan volume pori permeable juga dilaporkan. Didapati bahwa penambahan serat memperbaiki sifat-sifat mekanis beton agregat praletak. Indeks perkuatan secara sserat berkolerasi kuat terhadap sifat-sifat mekanis beton. Untuk beton agregat praletak polos hingga beton agregat praletak berserat dua indeks perkuatan 2, kuat tekan meningkat secara linier dari 21,9 MPa. Menjadi 46,9 MPa. Kuat tarik-lentur beton meningkat secara eksponensial dari 3,3 MPa menjadi 15,5 MPa. Disis lain, modulus elastisitas beton berkurang secara linier dengan bertambahnya indeks perkuatan serat, yakni dari 31.700 MPa menjadi 23.700 MPa. Pemeriksaan sifat-sifat fisis beton mengindikasikan bahwa beton ini memiliki level durabilitas yang memadai bentuk penerapan pada struktur.Kata kunci :  beton agregat peralatan, beton berserat baja, SIFCON, indeks perkuatan tinggi, sifat-sifat mekanis
STRUCTURAL BEHAVIOR OF PILE CAP 3 PILE WITH EKSENTRIC LOAD DESIGNED USING STRUT AND TIE MODEL WITH NUMERICAL METHOD Taufik, Panji Ginaya; Sulistyo, Djoko; Aminullah, Akhmad
Media Teknik Sipil Vol 17, No 1 (2019): Februari
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1233.397 KB) | DOI: 10.22219/jmts.v17i1.7483

Abstract

Pile cap is a structure to distribute load from the upper structure to the sub structure. Often the planning of the pile cap is approached as a two way slab or beam with pile as restrain, by consider the bending and shear separately. As is the case with conventional methods that consider 1-way shear, 2-way shear, and bending separately. The strut and tie model can be used as an alternative method in designing a pile cap, by approaching the stress trajectory with the truss model. In this study, a pile cap will be designed using the conventional method and the strut and tie model, the pile cap with 3 pile cap and an eccentric load. Then the results are tested numerically using Abaqus to determine the difference in behavior. The main reinforcement results from the strut and tie model method are more evenly stressed than the conventional method, also the vertical load needed to achieve the main reinforcement yield stress strut and tie model (1100 kN) is greater than the conventional method (900 kN).
Co-Authors Aminullah, Akhmad Bambang Supriyadi Iman Satyarno Muslikh ".", Muslikh Praganif Sukarno Randa, Sam Satyarna, Iman Taufik, Panji Ginaya Wiku A Krasna Yanuar Haryanto