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All Journal Jurnal Teknik Sipil Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat Peka: Jurnal Pengabdian Kepada Masyarakat
Dinar Gumilang Jati
Universitas Atma Jaya Yogyakarta
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation

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PEMODELAN ELEMEN HINGGA NON LINIER PELAT SATU ARAH BETON BERTULANG BERONGGA BOLA Jati, Dinar Gumilang
Jurnal Teknik Sipil Vol 12, No 4 (2014)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (348.626 KB) | DOI: 10.24002/jts.v12i4.631

Abstract

Pelat beton bertulang berongga bola merupakan salah satu teknologi alternatif yang bertujuan untuk mengurangi berat sendiri struktur dan menghemat material beton. Penempatan bola pada area tarik beton diharapkan tidak akan mengurangi kekuatan lentur pelat tersebut. Kondisi non linier material beton dan keberadaan rongga dalam beton mendorong perlunya permasalahan ini didekati dengan pemecahan numerik menggunakan program ATENA. Pada penelitian ini membahas perilaku lentur pelat solid dengan ketebalan 12 cm (PL0), dan pelat beton bertulang berongga bola dengan ketebalan 12 cm (PB17), dengan sistem beton cor ditempat, menggunakan metode elemen hingga non linier. Pengujian ini menggunakan pembebanan statis dari hydraulic jack yang diterapkan pada dua titik beban. Studi parameter penelitian ini mengamati pengaruh rasio rongga pada pelat terhadap perilaku lenturnya. Analisis numerik dilakukan dengan program ATENA dan program GID sebagai graphical user interface. Perilaku yang diamati pada penelitian ini antara lain kuat lentur, kekakuan dan daktilitas. Penentuan tipe elemen pada pemodelan numerik mempengaruhi hasil analisisnya. Perbandingan tipe elemen mengindikasikan bahwa kuat lentur pelat solid dengan elemen hexahedral (PL0_NUM_HEX) lebih mendekati hasil pengujian eksperimen (PL0_EKS) daripada pelat solid dengan elemen tetrahedral (PL0_NUM_TET). Pada penelitian ini didapatkan nilai kuat lentur pengujian numerik pada pelat PL0_NUM dan PB17_NUM berturut turut sebesar 54 kN dan 53 kN. Sementara itu nilai kuat lentur pengujian eksperimen untuk PL0_EKS dan PB17_EKS berturut-turut sebesar 43,29 kN dan 46, 29 kN.. Perbedaan nilai kuat lentur tersebut terjadi karena model numerik mensimulasikan kondisi struktur yang ideal. Kuat lentur, kekakuan dan daktilitas pelat beton berongga bola akan menurun seiring bertambahnya rasio rongga pada pelat.
PEMODELAN ELEMEN HINGGA NON LINIER PELAT SATU ARAH BETON BERTULANG BERONGGA BOLA Dinar Gumilang Jati
Jurnal Teknik Sipil Vol. 12 No. 4 (2014)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (348.626 KB) | DOI: 10.24002/jts.v12i4.631

Abstract

Pelat beton bertulang berongga bola merupakan salah satu teknologi alternatif yang bertujuan untuk mengurangi berat sendiri struktur dan menghemat material beton. Penempatan bola pada area tarik beton diharapkan tidak akan mengurangi kekuatan lentur pelat tersebut. Kondisi non linier material beton dan keberadaan rongga dalam beton mendorong perlunya permasalahan ini didekati dengan pemecahan numerik menggunakan program ATENA. Pada penelitian ini membahas perilaku lentur pelat solid dengan ketebalan 12 cm (PL0), dan pelat beton bertulang berongga bola dengan ketebalan 12 cm (PB17), dengan sistem beton cor ditempat, menggunakan metode elemen hingga non linier. Pengujian ini menggunakan pembebanan statis dari hydraulic jack yang diterapkan pada dua titik beban. Studi parameter penelitian ini mengamati pengaruh rasio rongga pada pelat terhadap perilaku lenturnya. Analisis numerik dilakukan dengan program ATENA dan program GID sebagai graphical user interface. Perilaku yang diamati pada penelitian ini antara lain kuat lentur, kekakuan dan daktilitas. Penentuan tipe elemen pada pemodelan numerik mempengaruhi hasil analisisnya. Perbandingan tipe elemen mengindikasikan bahwa kuat lentur pelat solid dengan elemen hexahedral (PL0_NUM_HEX) lebih mendekati hasil pengujian eksperimen (PL0_EKS) daripada pelat solid dengan elemen tetrahedral (PL0_NUM_TET). Pada penelitian ini didapatkan nilai kuat lentur pengujian numerik pada pelat PL0_NUM dan PB17_NUM berturut turut sebesar 54 kN dan 53 kN. Sementara itu nilai kuat lentur pengujian eksperimen untuk PL0_EKS dan PB17_EKS berturut-turut sebesar 43,29 kN dan 46, 29 kN.. Perbedaan nilai kuat lentur tersebut terjadi karena model numerik mensimulasikan kondisi struktur yang ideal. Kuat lentur, kekakuan dan daktilitas pelat beton berongga bola akan menurun seiring bertambahnya rasio rongga pada pelat.
Peningkatan Kualitas Penanganan Pascapanen Kopi Di Gapoktan Sejahtera Umbulharjo Cangkringan Sleman Yogyakarta Yuliana Reni Swasti; Dinar Gumilang Jati; Ekawati Purwijantiningsih
Agrokreatif: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 8 No. 1 (2022): Agrokreatif Jurnal Ilmiah Pengabdian Kepada Masyarakat
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrokreatif.8.1.22-31

Abstract

The coffee farmers of Farmer Union (Gapoktan) Sejahtera Umbulharjo had a lack of knowledge of good coffee post-harvest handling such as the best harvesting time, fermentation, drying, roasting green been extracting, and packaging roasted coffee need to be improved through extension and training postharvest handing. This research aimed to improve the quality of the coffee postharvest handling. The methods employed are extension and training. The result showed the increase of Gapoktan farmers’ understanding, especially in harvesting technique (pre-test score 33,33 and post-test score 93,33) and drying coffee (pre-test score 44,44 and post-test score 100). In addition, the improvement of postharvest handling reduced the drying time from 30 days to 14 days.
PERKERASAN JALAN MENUJU ECO CAMP MANGUNKARSA PANTAI GRIGAK KELURAHAN GIRIKERTO,KAPANEWON PANGGANG,KABUPATEN GUNUNGKIDUL John Tri Hatmoko; Dinar Gumilang Jati
PeKA: Jurnal Pengabdian Kepada Masyarakat Vol 5, No 1 (2022): Juni
Publisher : LPPM, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/peka.v5i1.3932

Abstract

Mangunkarsa Ecocamp is located on Grigak Beach, the village of Karang, Gunungkidul egency. It was built as the conservation area. However, there is almost no connection between Ecocamp and Karang village ; then it is required to build the roadway connecting those two locations. To meet the requirement, this public service programs attempted to provide the connecting roadway of those two locations. The roadway was designed with the length of 2,00 km and 3,00 meters width, and the surface course was designed as sand sheet pavement. The budget for material was supported by the government, and it was also provided by the local society for project execution . There were three steps to complete the program. The first step was location field-survey to make sure the site conditions, followed by soil sampling for subgrade design. The second was to perform laboratory experiment to verify physical and mechanical properties of soil, and it was followed with design the pavement , and the last was to execute the project. The laboratory experiment was done according to the standard, the pavement design was done according to the guidance issued by the Ministry of PUPR, and the project execution was done according to the basic standard. The results showed that the soil was met the requirement as subgrade, the thickness of the pavement was obtained 6 cm thick. The project execution was finished within 10 days
EFEKTIVITAS ANGKUR EPOKSI TERHADAP KEKANGAN EKSTERNAL BALOK BETON BERTULANG DENGAN PERKUATAN CFRP Dinar Gumilang Jati; Junaedi Utomo; Felix Adi Tanudjaja; Han Ay Lie
Jurnal Teknik Sipil Vol. 17 No. 2 (2023)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jts.v17i2.7021

Abstract

Externally Bonded Carbon Fiber Reinforced Polymer (EB-CFRP) with U-wrap is one of the alternative external strengthening of modern reinforced concrete beams, which has been proven effective in significantly increasing flexural and deformation capacities. Although quite effective in increasing the structural capacity, external reinforcement needs to be studied further about its failure behavior, the avoided failure is called debonding, an interface bond failure between the FRP composite material and the concrete material. Epoxy has a fairly high material resistance, but its use as a reinforcing composite bonding material needs further investigation. Adding epoxy anchors at the ends of CFRP can mobilize the tensile strength in CFRP, eliminating or delaying debonding failure. Epoxy anchors (epoxy-filled grooves) are expected to be effective and flexible for application to various forms of components of reinforced concrete structures that have been reinforced with EB-CFRP. Currently, there are no standards and guidelines for applying FRP anchors. However, research has been conducted on the failure pattern of FRP anchors with U-style wrapping which can avoid debonding so that failure with FRP rupture can be achieved. This study examines the effectiveness of epoxy anchorage in improving the external strengthening of reinforced concrete beams with EB-CFRP reinforcement. The behavior of epoxy anchors in reinforced concrete beams with EB-CFRP will be investigated through experimental tests.  
Co-Authors Felix Adi Tanudjaja Han Ay Lie John Tri Hatmoko Junaedi Utomo Purwijantiningsih , Ekawati Yuliana Reni Swasti