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All Journal TEKNIK REKA RACANA Paduraksa : Jurnal Teknik Sipil Universitas Warmadewa Jurnal Teknik Sipil Journal of Engineering and Technological Sciences Jurnal Teknik Sipil Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil E-Dimas: Jurnal Pengabdian kepada Masyarakat Jurnal Rekayasa Sipil Jurnal Ilmiah Universitas Batanghari Jambi PROZIMA (Productivity, Optimization and Manufacturing System Engineering) BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Jurnal Aplikasi Teknik Sipil Jurnal Permukiman Jurnal Abdimas Mandiri JURNAL REKAYASA Jurnal ABDINUS : Jurnal Pengabdian Nusantara Menara: Jurnal Teknik Sipil Journal of Industrial Engineering and Operation Management (JIEOM) Wood Research Journal : Journal of Indonesian Wood Research Society Wood Research Journal : Journal of Indonesian Wood Research Society Journal of Economic, Business and Engineering (JEBE) Jurnal Talenta Sipil SERVIRISMA: Jurnal Pengabdian kepada Masyarakat Jurnal Konstruksi dan Infrastruktur : Teknik Sipil dan Perencanaan Dinamika Teknik Sipil: Majalah Ilmiah Teknik Sipil Jurnal Teknik Sipil Sasambo: Jurnal Abdimas (Journal of Community Service) Journal of Green Science and Technology IJIES (International Journal of Innovation in Enterprise System)
Yosafat Aji Pranata
Universitas Kristen Maranatha
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Uniaxial Tension of Yellow Meranti Timber at an Angle to the Grain Yosafat Aji Pranata; Roky Surono
Wood Research Journal Vol 4, No 2 (2013): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2013.4.2.83-87

Abstract

Tensile strength measures the force applied to a timber element/structural element to the point where it breaks. In this paper, a finite element analysis (FEA) of uniaxial tension of Yellow Meranti timber (Shorea spp.), using von Mises Criterion to include orthotropic nature of the material, was used to derive a prediction of tensile strength at an angle to the grain (cross grain) in plane stress (2D) modeling. To investigate the validity of the finite element analysis results, various 5°, 10°, and 15° cross grain specimens of Yellow Meranti (Shorea spp.) were tested in laboratory under uniaxial tension stress using UTM instrument. Comparison with experimental results shows that the FEA simulation predicts the stress-strain curves lower than experimental results, which result shows good agreement, it is seen from %-relative difference which is less than 30%. Calculations were performed with the numerical analysis (FEA) and Experimental Tests gives results that the difference is not too significant, for specimens with a grain angle of 5° difference in outcomes by 27%, for a grain angle of 10° difference in outcomes by 25%, and for a grain angle 15° difference in outcomes by 22%.
Beam-Column Timber Joint Connection Behavior Due to Nail and Modified-Washer Reinforcement Tests Yosafat Aji Pranata; Anang Kristianto; Olga Pattipawaej
Wood Research Journal Vol 10, No 1 (2019): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2019.10.1.6-10

Abstract

Timber connection capacity, in case of beam-column joint connection provides significant impact on the wooden building structures. Strength and stiffness of timber connections using reinforcement technique of wooden building structures have not been studied intensively. This paper studies the use of nails and modified-washer to improve wood connection’s performance. The experimental tests were conducted in the laboratory by comparing the partial connection between test specimen timber without reinforcement (standard type) and the reinforcement (PRP type). The testing was conducted based on partial connection beam-column joint test using Universal Testing Machine’s with a modified holder. Wood studied includes Meranti (Shorea spp.) and Mersawa (Anisoptera spp.). PRP type connection was using nails and modified-washer strengthening, and standard type connection was using a classic washer. Parameters studied were strength and stiffness of the connection, reviewed both: proportional limit load and ultimate limit load conditions. Result obtained from this research indicates that the use of nails and modified-washer make a positive contribution to improving the performance of the beam- column timber joint connections, in terms of strength capacity (both of proportional limit and ultimate limit loads) and stiffness capacity (displacement ductility ratio). Meranti beam-column timber joint is more brittle than Mersawa beam column timber joint, it has an impact on the results. PRP-type of Mersawa timber connection produces a higher ductility than the standard type, while the PRP-type of Meranti timber connection produces a similar ductility to the standard type.
Strength and Stiffness Behavior of Earthquake Resistant Pedestrian LVL Timber Bridge Bernardinus Herbudiman; Delima Delima; Yosafat Aji Pranata
Wood Research Journal Vol 11, No 2 (2020): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2020.11.2.53-57

Abstract

A bridge is a structure which is used to connect two areas separate by obstacles. The environmental damage caused a number of reductions in the production of timber, and by that, the LVL timber which is a high quality processed or engineered timber is chosen. This research determined the design of the timber bridge structure for pedestrian with simple beam type and earthquake resistant. The load in this bridge is referring to the SNI 1725:2016 and SNI 2833:2008, the design of the girder and the connection is referring to SNI 7973:2013, and the deflection is referring to the LFRD for Highway Bridge Superstructures. The timber bridge is designed to have a span of 10 metres long and 3 metres wide. The modeling and designing of the wooden bridge are using an application called SAP2000 based on finite element analysis. Result obtained from this research indicated that the longitudinal dimension of the girder is 360 mm x 630 mm and the cross sectional dimension is 180 mm x 270 mm. The number of bolts and lock screws needed on the connection among the longitudinal girders are 40 pieces, between the longitudinal girders and the cross sectional girders is three pieces, and between the railing and the slab are two pieces. Based on the stiffness review, the results showed that the bridge deflection that occurred was lower than the permit deflection
Uniaxial Tension of Yellow Meranti Timber at an Angle to the Grain Yosafat Aji Pranata; Roky Surono
Wood Research Journal Vol 4, No 2 (2013): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2013.4.2.83-87

Abstract

Tensile strength measures the force applied to a timber element/structural element to the point where it breaks. In this paper, a finite element analysis (FEA) of uniaxial tension of Yellow Meranti timber (Shorea spp.), using von Mises Criterion to include orthotropic nature of the material, was used to derive a prediction of tensile strength at an angle to the grain (cross grain) in plane stress (2D) modeling. To investigate the validity of the finite element analysis results, various 5°, 10°, and 15° cross grain specimens of Yellow Meranti (Shorea spp.) were tested in laboratory under uniaxial tension stress using UTM instrument. Comparison with experimental results shows that the FEA simulation predicts the stress-strain curves lower than experimental results, which result shows good agreement, it is seen from %-relative difference which is less than 30%. Calculations were performed with the numerical analysis (FEA) and Experimental Tests gives results that the difference is not too significant, for specimens with a grain angle of 5° difference in outcomes by 27%, for a grain angle of 10° difference in outcomes by 25%, and for a grain angle 15° difference in outcomes by 22%.
Studi Pengaruh Radius Kelengkungan terhadap Efektifitas Kekangan pada Kolom Persegi dengan Perkuatan FRP Anang Kristianto; Yosafat Aji Pranata; Noek Sulandari
Jurnal Ilmiah Universitas Batanghari Jambi Vol 22, No 1 (2022): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/jiubj.v22i1.1949

Abstract

Revised code of earthquake-resistant building design from SNI 1726:2012 to SNI 1726:2019 as a result of changes in the earthquake magnitude that occurred in recent years and developments in earthquake engineering research resulted in many building structural elements should be strengthened, especially on column elements. One of the most adopted strengthening techniques for enhancing the performance of existing RC columns consists of wrapping a member with CFRP (Carbon Fiber Reinforcement Polymer) sheets, inducing a passive confinement action capable of increasing the columns axial strength and displacement capacity. The use of CRFP as strengthening on square columns in existing buildings should consider various factors, including the column corner radius and the width of the strip of FRP required if not using full wrapping. This paper presents the confinement stresses analysis at the different radius of curvature of the square column corner and analyzes the correlation of stress-strain in the cross-section using data from various existing studies. An experimental study will also be done by axial loading test FRP column (100mm x 100mm x 200mm) with several different curvature radii. The results of the axial compression test to the specimens found that the effect of curvature is quite significant for confinement effectiveness at r/b < 0.15. Based on this experiment,  a slight increase of the axial capacity on the column specimens with radius curvature r=0mm and r=10mm ( below r=13mm, the smallest radius allowed by the code). Rectangular concrete columns strengthened by FRP with r/b < 0.15 could not be effective to the confined concrete core due to stress concentration at the corner.
Nonlinear Finite Element Modeling of Red Meranti Compression at an Angle to the Grain Yosafat A. Pranata; Bambang Suryoatmono
Journal of Engineering and Technological Sciences Vol. 45 No. 3 (2013)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2013.45.3.2

Abstract

In an orthotropic material, the grain angle has a significant influence on its mechanical properties. The aim of this research was to perform a numerical simulation using a nonlinear finite element analysis (FEA) to obtain the compression strength of the Red Meranti (shorea spp.) timber species at an angle to the grain ranging from 12° to 80°. The material properties needed for the analysis were obtained from clear specimen tests. To investigate the validity of the numerical results, various cross grain specimens were tested under uniaxial compressive stress. It has been shown in this study that an FEA based on the distortion energy of an orthotropic material can be used to obtain the compressive strength at proportional limit for cross grain specimens. Compa-rison with the experimental results showed that for a cross grain angle between 12° and 80° the FEA predicted the strength to be 9.4% to 33.6% lower than the experimental results. Compared to using Hankinson's formula to predict the compressive strength at a cross grain angle, using the FEA always gave a lower value, ranging from 13.2% to 30.5%. Based on these results, an FEA incorporating Hill's yield criterion is a conservative method for predicting compressive strength at an angle to the grain.
ANALISIS KEGAGALAN STRUKTUR BANGUNAN RUMAH TINGGAL DENGAN METODE ELEMEN HINGGA LINIER Yosafat Aji Pranata Leny Elvira
Jurnal Teknik Sipil Vol. 12 No. 3 (2013)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (439.372 KB) | DOI: 10.24002/jts.v12i3.624

Abstract

Komponen utama penyusun struktur bangunan rumah tinggal adalah kolom dan balok. Dinding bata sebenarnya merupakan komponen struktur utama pula, namun sering diasumsikan sebagai komponen non-struktural dalam peraturan SNI 03-2847-2002, sehingga pada umumnya pengaruh kekuatan dan kekakuan dinding bata jarang diperhitungkan dalam perencanaan bangunan. Tujuan dari penelitian ini adalah membuat model rumah tinggal dua lantai secara 3D (bangunan eksisting) dengan metode elemen hingga. Analisis dibuat dengan pemodelan dua dimensi (elemen shell). Pemodelan rumah tinggal meliputi balok, kolom, pelat lantai, dinding bata, kusen dan tulangan balok. Beban yang direncanakan adalah beban gravitasi dan beban lateral (gempa), sehingga dapat diketahui pengaruhnya terhadap struktur rumah tinggal. Kemudian dipelajari dan dianalisis deformasi pada balok dan tegangan S11 yang terjadi pada balok, pelat lantai, dinding bata, kolom dan kusen. Hasil yang diperoleh dari penelitian adalah memperlihatkan bahwa lendutan yang terjadi pada semua balok masih memenuhi batasan lendutan ijin. Terjadi kegagalan pada beberapa daerah balok, dinding, dan lantai, dengan indikasi dari informasi besarnya tegangan (S11) yang terjadi telah melebihi batasan kuat tekan beton. Sedangkan hasil simulasi memperlihatkan bahwa tegangan (S22) yang terjadi pada kolom masih lebih kecil daripada nilai kuat tekan beton, sehingga kolom masih dalam kondisi kuat. Hasil simulasi memperlihatkan bahwa tegangan yang terjadi pada kusen lebih kecil daripada nilai kuat tarik dan kuat tekan kayu jenis meranti merah, sehingga kusen masih dalam kondisi utuh. Secara umum informasi kegagalan struktur pada bagian dinding bata menggambarkan bahayanya kerusakan rumah tinggal akibat gempa.
KEKUATAN LENTUR, MOE, DAN MOR KAYU ULIN (EUSIDEROXYLON ZWAGERI) Yosafat Aji Pranata Johnny Gunawan Palapessy
Jurnal Teknik Sipil Vol. 13 No. 1 (2014)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3307.913 KB) | DOI: 10.24002/jts.v13i1.641

Abstract

Dalam perencanaan balok kayu (komponen struktur lentur), diperlukan parameter kekuatan lentur kayu (Fb) dan modulus elastisitas (MoE). Kekuatan lentur dapat diperoleh dari hasil pengujian eksperimental di laboratorium dengan acuan standar antara lain ASTM D143. Penelitian ini bertujuan melakukan pengujian eksperimental uji lentur kayu Ulin (Eusideroxylon Zwageri) dengan alat Universal Testing Machine (UTM). Hasil yang diperoleh adalah kekuatan lentur (Fb) pada beban batas proporsional, kekuatan lentur pada beban ultimit (MoR), dan modulus elastisitas (MoE) lentur. Jumlah benda uji adalah tiga benda uji ukuran penampang 50 mm x50 mm x 760 mm sesuai metode uji primer ASTM D143. Hasil yang diperoleh adalah Fb sebesar 52,45 MPa (deviasi standar 226,24 MPa dan koefisien variasi 25,40%), MoE sebesar 5573,79 MPa, MoR sebesar 85,92 MPa (deviasi standar 112,55 MPa dan koefisien variasi 7,71%).
Rasio Modulus Penampang Elastik Balok Kayu Laminasi-Baut Yosafat Aji Pranata; Bambang Suryoatmono; Johannes Adhijoso Tjondro
Jurnal Teknik Sipil Vol 19 No 3 (2012)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2012.19.3.4

Abstract

Abstrak. Balok laminasi dapat menjadi alternatif pengganti kayu utuh, karena memberikan keuntungan yaitu dapat difabrikasi dengan bentang sesuai kebutuhan dan membuat penampang kayu yang lebih besar. Tujuan penelitian ini adalah menemukan persamaan empiris rasio modulus penampang elastik balok kayu laminasi-baut. Rasio modulus penampang elastik yaitu rasio antara modulus penampang elastik balok laminasi terhadap balok utuh. Ruang lingkup penelitian yaitu sistem laminasi secara horisontal, kayu Indonesia dengan berat jenis berkisar 0,4-0,8 yaitu meranti merah (shorea spp), keruing (dipterocarpus spp), dan akasia mangium, penampang balok prismatis, penelitian dilakukan secara eksperimental di laboratorium dan numerikal metode elemen hingga nonlinier. Parameter yang dibahas adalah jenis kayu, ukuran baut, jumlah baris baut, dan jarak baut. Balok mempunyai bentang 3 meter dan disusun oleh 4 lamina. Model tegangan-regangan kayu untuk simulasi numerikal berdasarkan kriteria plastisitas Hill, model tegangan-regangan baut menggunakan model elastoplastik. Kesimpulan yang diperoleh yaitu tren kurva hubungan beban-lendutan balok kayu laminasi-baut adalah berbentuk bilinier, persamaan empiris rasio modulus penampang elastik merupakan fungsi dari jenis kayu, diameter baut, dan rasio jumlah baris terhadap jarak baut. Rasio modulus penampang elastik dapat digunakan untuk memprediksi kuat lentur balok laminasi pada beban batas proporsional. Abstract. Laminated beam can be an alternative for solid timber, because it provides the advantage that it can be fabricated with a needed-span and a bigger cross section. The purpose of this research is to obtain an empirical equation of the bolt-laminated timber beam elastic section modulus ratio. Elastic section modulus ratio is elastic section modulus ratio between laminated and solid beams. Scope of this research are horizontally laminated system, Indonesian timber with specific grafity ranged 0.4-0.8 which are red meranti (shorea spp), keruing (dipterocarpus spp), and acacia mangium, prismatic beam section, experimental test in laboratorium and numerical simulation using nonlinear finite element method. The parameters discussed are timber type, bolt diameter, number of row, and spacing. Beam has a 3-meter span and arranged by 4 laminae. Timber stress-strain model for numerical simulation based on Hill plasticity, bolt stress-strain model is elasto-plastic. Results obtained are beam load-displacement curve trend is bilinear, the elastic section modulus ratio equation are the fuction of timber type, bolt diameter, and number of row against bolt spacing ratio. The elastic section modulus ratio can be used to predict the bending strength at the proportional limit.
Kekuatan Tekan Sejajar Serat dan Tegak Lurus Serat Kayu Ulin (Eusideroxylon Zwageri) Yosafat Aji Pranata; Bambang Suryoatmono
Jurnal Teknik Sipil Vol 21 No 1 (2014)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2014.21.1.2

Abstract

Abstrak. Kayu Ulin (Eusideroxylon Zwageri) termasuk salah satu kayu dengan kekuatan tinggi. Penelitian ini bertujuan untuk mendapatkan kekuatan tekan sejajar serat dan tegak lurus serat kayu Ulin dengan pengujian eksperimental. Hasil yang diperoleh adalah kekuatan tekan sejajar serat pada beban proporsional sebesar 50,53 MPa (deviasi standar 11,35 MPa dan koefisien variasi 22,47%), kekuatan tekan sejajar serat pada beban ultimit 55,64 MPa (deviasi standar 11,17 MPa dan koefisien variasi 20,07%), kekuatan tekan tegak lurus serat pada beban proporsional sebesar 20,26 MPa (deviasi standar 2,10 MPa dan koefisien variasi 10,31%), dan kekuatan tekan tegak lurus serat pada beban ultimit 29,74 MPa (deviasi standar 4,62 MPa dan koefisien variasi 15,52%). Modulus elastisitas tekan sejajar serat yang diperoleh sebesar 10155,05 MPa, dan modulus plastisitas tekan sejajar serat sebesar 1317,83 MPa. Modulus Elastisitas tekan sejajar serat yang diperoleh sebesar 1381,84 MPa, dan  modulus plastisitas tekan tegak lurus serat sebesar 195,77 MPa. Hasil penelitian ini diharapkan dapat memberikan sumbangan ilmiah untuk basis data sifat mekanika kayu Indonesia dan khususnya untuk perencanaan komponen struktur tekan dan lentur.Abstract. Ulin (Eusideroxylon Zwageri) is one of wood species with high strength. This study aims to obtain the compressive strength parallel and perpendicular to the grain carry by experimental tests. The result obtained are the compressive strength parallel to the grain at proportional load 50.53 MPa (standard deviation 11.35 and coefficient of variation 22,47%), the compressive strength parallel to the grain at ultimate load 55.64 MPa (standard deviation 11.17 and cov 20,07%), the compressive strength perpendicular to the grain at proportional load 20.36 MPa (standard deviation 2.10 MPa and cov 10,31%), and the compressive strength perpendicular to the grain at ultimate load 29.74 MPa (standard deviation 4.62 MPa and cov 15,52%). Modulus of elasticity compression parallel  to the grain obtained from this research is 10155.05 MPa, and modulus of plasticity compression parallel to the grain 1317,83 MPa. Modulus of elasticity compression perpendicular to the grain is 1381,84 MPa, and modulus of plasticity compression perpendicular to the grain is 195,77 MPa. The result is expected to contribute to general scientific databases mechanical properties of wood in Indonesia and particularly in the design of the compressive and flexural structural components.
Co-Authors AAN DARMAWAN Alfatama, Jasen Anang Kristianto Andrias Suhendra Nugraha Ary Dharmawan Bambang Suryoatmono Bas Boys, Maher Salal Hesy Bernardinus Herbudiman Bernardinus Herbudiman Bernardinus Herbudiman Bernardinus Herbudiman, Bernardinus Boys, Salal Hesy Bas Calvien Haryanto Chandra, Jonathan Daud R. Wiyono Daud Rahmat Wiyono Dedi Hadian Delima Delima Deni Setiawan DENI SETIAWAN Deni Setiawan Deni Setiawan Dharmawan, Ary Elty Sarvia Fadlillah Ariani Suroso Faraz Haiatul Maknun Frisda, Tani Gaol, Ricky Fransiskus Lumban Ginardy Husada Hagiyanto, Sofhie Angela Hanny Juliani Dani Hartono, Sutantra Hendry Wong Hutasoit, Aldi Febri Iswandi Imran Jimmy Agustian Loekito Jimmy Agustian Loekito Johannes Adhijoso Tjondro Johnny Rakhman Kevin Tjahyadi Keysie Chelsie Shidney Rapar Laia, Viencent Cheristian Lehman, Andrew Sebastian Loekito, Jimmy Agustian Maknun1, Faraz Haiatul Maria Christine Sutandi Markus Tanubrata Marvin Chandra Wijaya Michael Wijaya Muhammad Rusli Nathan Madutujuh Noek Sulandari Noek Sulandari Noek Sulandari Noek Sulandari Novi Novi Novi Soesilo Novie Theresia Br. Pasaribu Olga Catherina Pattipawaej Pin Panji Yapinus, Pin Panji Prasodjo, Kaira Jesusa Pricillia Sofyan Tanuwijaya Riko Arlando Saragih Robby Yussac Tallar Roi Milyardi Roky Surono Saputra, Yonathan Adi Saudila, Aulia Jessica Semuil Tjiharjadi Shidney Rapar, Keysie Chelsie Simanta, Djoni Soesilo, Novi Sugianto, Joesack Renaldi Suhanda, Felix Suhendar, Prabu Mandvi Hafiz Anjar Suroso, Fadlillah Ariani Syafarina Nurmah Rialita Verena Bernadetta C. N Viencent Cheristian Laia Wiyono, Daud R Wiyono, Daud Rahmat Yonathan Aditya Santoso Yunizar Yunizar