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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Teknik Sipil LANGKAU BETANG: JURNAL ARSITEKTUR Jurnal Rekayasa Sipil Jurnal Ilmu dan Teknologi Kayu Tropis PERENNIAL Journal of Infrastructural in Civil Engineering (JICE) JURNAL HUTAN TROPIS
Fengky Satria Yoresta
Departemen Hasil Hutan, Fakultas Kehutanan Institut Pertanian Bogor Jl. Raya Darmaga, Bogor 16680
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science Transportation

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Karakteristik Kekuatan Leleh Lentur Baut Besi dengan Beberapa Variasi Diameter Baut Herawati, Evalina; Sadiyo, Sucahyo; Nugroho, Naresworo; Karlinasari, Lina; Yoresta, Fengky Satria
Jurnal Teknik Sipil Vol 24, No 3 (2017)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1236.88 KB) | DOI: 10.5614/jts.2017.24.3.4

Abstract

AbstrakBaut merupakan salah satu jenis alat sambung mekanis atau pengencang yang banyak digunakan dalam sambungan kayu. Penelitian ini bertujuan untuk menentukan kekuatan leleh lentur (Fyb) dari tiga ukuran diameter baut besi yang umum digunakan untuk sambungan kayu dan satu ukuran diameter baut baja sebagai pembanding. Spesifikasi baut yang digunakan dilihat dari dimensi dan komposisi penyusunnya. Nilai Fyb baut diperoleh dari pengujian momen leleh lentur dengan mengacu pada standar ASTM F1575. Hasil pengujian menunjukkan baut besi yang digunakan berasal dari bahan baja karbon rendah sedangkan baut baja berasal dari bahan baja karbon sedang. Nilai Fyb baut baja lebih tinggi dibandingkan baut besi. Nilai Fyb baut besi diameter 1/2 inci berbeda nyata dengan nilai baut diameter 5/8 dan 3/4 inci. Nilai Fyb ketiga diamater baut berada di atas nilai Fyb baut yang tercantum dalam SNI 7973:2013 tentang Spesifikasi desain untuk konstruksi kayu.AbstractBolt is one of the mechanical fasteners that are widely used in wood connections. This study aims to determine the bending yield strength (Fyb) of three measures of bolt diameter made from iron which commonly used for the connection of wood and one measure of bolt diameter made from steel as a comparison. Specifications of bolts used can be seen from the dimensions and composition of the constituent. Testing of the bending yield strength was conducted according to ASTM F1575. The results showed that iron bolts used comes from low carbon steel, while steel bolts derived from medium carbon steel materials. Fyb value of steel bolts was higher than iron bolt. Fyb value of 1/2 inch diameter iron bolts was significantly different from the value of the bolts 5/8 and 3/4 inch in diameter. The Fyb value of three bolt diameter were above the Fyb value listed in SNI 7973:2013 concerning design specification for wood constructions.
PHYSICAL AND MECHANICAL PROPERTIES OF BLACK WOOD (EBONY) AS A CONSTRUCTION MATERIAL Yoresta, Fengky Satria
LANGKAU BETANG: JURNAL ARSITEKTUR Vol 2, No 1 (2015)
Publisher : Department of Architecture, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (283.89 KB) | DOI: 10.26418/lantang.v2i1.13837

Abstract

This research is aimed to determine physical and mechanical properties of Ebony wood as a construction material. The physical and mechanical properties test is conducted based on ASTM D 143-94 code. The mean value of moisture content and specific gravity of Ebony wood is obtained 12,90% and 0,92 gr.cm-3 respectively. Meanwhile MOE, bending strength, compressive strength parallel to grain, shear strength, and tensile strength parallel to grain are 180.425,87 kg.cm-2; 1656,22 kg.cm-2; 861,55 kg.cm-2; 119,61 kg.cm-2; dan 2.319,03 kg.cm-2 respectively. Based on the test results, it can be concluded that Ebony wood is classified to Strength Class I due to PKKI 1961, so it can be recommended for use in heavy construction such as bridge and building structures Penelitian ini bertujuan menentukan sifat fisis dan mekanis kayu  Ebony sebagai material konstruksi. Pengujian sifat fisis dan mekanis dilakukan berdasarkan standar ASTM D 143-94. -3Nilai kadar air rata-rata kayu Ebony diperoleh sebesar 12,90% dan berat jenis 0,92 gr.cm . Sementara nilai rata-rata MOE, kuat lentur, kuat tekan sejajar serat, kuat geser, dan kuat tarik -2 -2 -2sejajar serat berturut-turut adalah 180.425,87 kg.cm ; 1656,22 kg.cm ; 861,55 kg.cm ; -2 -2119,61 kg.cm ; dan 2.319,03 kg.cm . Berdasarkan hasil penelitian dapat disimpulkan bahwa kayu Ebony tergolong kelas kuat I menurut PKKI 1961, sehingga dapat direkomendasikan untuk digunakan pada konstruksi-konstruksi berat seperti jembatan dan struktur bangunan. REFERENCESAghayere A & Jason V. 2007. Structural Wood Design: A Practice-Oriented Approach Using the ASD Method. John Wiley & Sons, Inc., New JerseyBoen T. 2009. Constructing Seismic Resistant Masonry Houses in Indonesia. United Nation.Chauf KA. 2005. Karakteristik Mekanik Kayu Kamper sebagai Bahan Konstruksi. Majalah Ilmiah MEKTEK . Vol 7 : 41-47.Dolan JD. 2004. Timber Structures. Pp 628-669 in Wai FC & Eric ML (Eds) Handbook of Structural Engineering – 2nd ed. USA. Duggal SK. 2008. Building Materials – 3rd ed. New Age International (P) Ltd, New Delhi.Kim NT, Matsumura J & Oda K. 2011. Effect of growing site on the fundamental wood properties of natural hybrid clones of Acacia in Vietnam. Wood Science 57: 87–93.Lempang M & Muhammad A. 2008. Anatomical Structure, Physical and Mechanical Properties of Kumea Batu Wood. Jurnal Penelitian Hasil Hutan. Vol.26(2): 138-147 (In Indonesian)Martawijaya A., Kartasujana I, Mandang YI, Prawira SA, & Kadir K. 2005. Atlas Kayu Indonesia, Jilid II. Departemen Kehutanan, Badan Penelitian dan Pengembangan Kehutanan, Bogor.PKKI (Peraturan Konstruksi Kayu Indonesia). 1961. PKKI NI – 5 1961. Direktorat Jenderal Cipta Karya Departemen Pekerjaan Umum, Bandung.Wanneng PX, Ozarska B, & Daian MS. 2014. Physical Properties Of Tectona Grandis Grown In Laos. Journal of Tropical Forest Science 26(3): 389–396Winandy JE. 1994. Wood Properties. Hal 549-561 dalam Arntzen, Charles J., (Editor) Encyclopedia of Agricultural Science. Vol. 4. October 1994. Academic Press, Orlando.Wood Handbook. 2010. Wood as Engineering Material. Forest Product Laboratory. United States Department of Agriculture Forest Service, Madison.Yancey CW. et al. 1998. A Summary of the Structural Performance of Single Family Wood Framed Housing, Building and Fire Research Laboratory, National Institute of Standards and Technology, Gaithersburg, MD.
FLEXURAL TESTING OF WOOD-CONCRETE COMPOSITE BEAM MADE FROM KAMPER AND BANGKIRAI WOOD Yoresta, Fengky Satria
LANGKAU BETANG: JURNAL ARSITEKTUR Vol 2, No 2 (2015)
Publisher : Department of Architecture, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (180.563 KB) | DOI: 10.26418/lantang.v2i2.13833

Abstract

Certain wood has a tensile strength that almost equal with steel rebar in reinforced concrete beams. This research aims to understand the capacity and flexural behavior of concrete beams reinforced by wood (wood-concrete composite beam). Two different types of beams based on placement positions of wood layers are proposed in this study. Two kinds of wood used are consisted of Bangkirai (Shorea laevifolia) and Kamper (Cinnamomum camphora), meanwhile the concrete mix ratio for all beams is 1 cement : 2 fine aggregates : 3 coarse aggregates. Bending test is conducted by using one-point loading method. The results show that composite beam using Bangkirai wood is stronger than beams using Kamper wood. More thicker wood layer in tensile area will increase the flexural strength of beams. Crack patterns identified could be classified into flexural cracks, shear cracks, and split on wood layer Beberapa jenis kayu tertentu memiliki kekuatan tarik yang hampir sama dengan tulangan baja pada balok beton bertulang. Penelitian ini bertujuan memahami kapasitas dan perilaku lentur balok beton bertulang yang diperkuat menggunakan kayu (balok komposit beton-kayu). Dua tipe balok yang berbeda berdasarkan posisi penempatan kayu digunakan dalam penelitian ini. Dua jenis kayu yang digunakan adalah kayu Bangkirai (Shorea laevifolia) and Kamper (Cinnamomum camphora), sementara itu rasio campuran beton untuk semua balok menggunakan perbandingan 1 semen : 2 agregat halus : 3 agregat kasar. Pengujian lentur dilakukan menggunakan metode one-point loading. Hasil penelitian menunjukkan bahwa balok komposit dengan kayu Bangkirai lebih kuat dibandingkan balok dengan kayu Kamper. Semakin tebal lapisan kayu yang berada di daerah tarik akan meningkatkan kekuatan lentur balok. Pola kerusakan yang teridentifikasi dapat diklasifikasikan menjadi retak lentur, retak geser, dan pecah pada kayuREFERENCESBoen T. (2010). Retrofitting Simple Buildings Damaged by Earthquakes. World Seismic Safety Initiative. Indonesia.Chauf KA. (2005). Karakteristik Mekanik Kayu Kamper sebagai Bahan Konstruksi. Majalah Ilmiah MEKTEK 7: 41-47.Gangarao HVS, Narendra T & Vijay PV. (2007). Reinforced Concrete Design with FRP Composites. CRC Press, Boca Raton.PKKI (Indonesian Timber Construction Code). (1961). PKKI NI – 5 1961. Direktorat Jenderal Cipta Karya Departemen Pekerjaan Umum, Bandung.Pranata YA, Bambang S & Johannes AT. (2012). Rasio Modulus Penampang Elastik Balok Kayu Laminasi-Baut. Jurnal Teknik Sipil 19: 223-236.Thelandersson S. (2003). Introduction: Wood as a construction material. Pp 15-22 in Sven T & Hans JL (Eds) Timber Engineering. John Wiley & Sons Ltd, West Sussex.
KARAKTERISTIK MEKANIS DAN PERILAKU LENTUR BALOK KAYU LAMINASI MEKANIK Putri, Ratna Prasetyowati; Yoresta, Fengky Satria
LANGKAU BETANG: JURNAL ARSITEKTUR Vol 3, No 1 (2016)
Publisher : Department of Architecture, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (271.07 KB) | DOI: 10.26418/lantang.v3i1.16717

Abstract

Penggunaan paku atau baut maupun kombinasinya dengan perekat sebagai penghubungantar lamina pada balok kayu laminasi akan mempengaruhi karakteristik mekanis danperilaku keruntuhan balok tersebut. Penelitian ini bertujuan menentukan karakteristikmekanis dan menganalisa perilaku lentur balok kayu laminasi mekanik. Tiga tipe baloklaminasi digunakan dalam penelitian ini, ditambah balok glulam sebagai kontrol. Balok tipe 1menggunakan baut/paku di sepanjang bentang sebagai penghubung antar lamina. Balok tipe 2hanya menggunakan paku/baut pada sepertiga bentang di kedua ujung balok, sedangkan padasepertiga bentang lainnya menggunakan perekat. Paku atau baut pada balok tipe 3ditempatkan pada sepertiga bentang di tengah balok dan sisanya menggunakan perekat.Pengujian lentur dilakukan dengan metode one point centre loading dengan jarak antartumpuan 90cm. Hasil penelitian menyimpulkan balok tipe 3 memiliki nilai ModulusElastisitas (MOE) tertinggi dibandingkan balok tipe 1 dan tipe 2. MOE balok laminasitertinggi terdapat pada balok laminasi-paku diameter 0.3 cm tipe 3 (52162.95 kg/cm2)sedangkan terendah pada balok laminasi-paku diameter 0.3 cm tipe 1 (11077.41 kg/cm2).Modulus of Rupture (MOR) tertinggi terdapat pada balok laminasi-paku diameter 0.3 tipe 3(368.16 kg/cm2) dan terendah pada balok laminasi-baut diameter 0.5 cm tipe 3 (207.36kg/cm2). Balok kontrol memiliki nilai MOE dan MOR tertinggi dibandingkan semua baloklaminasi mekanik. Posisi penempatan baut, paku, dan perekat pada balok laminasi hanyaberpengaruh terhadap nilai MOE. Semua kerusakan yang ditemukan pada balok laminasimekanik adalah berupa kerusakan lentur dan geser antar lamina The use of nails or bolts or its combination with adhesive as connector between lamina on laminated wood beams will affect the mechanical characteristics and collapse behavior of the beam. This study aims to determine the mechanical characteristics and analyze the flexural behavior of mechanical-laminated wood beams. Three types of the mechanical-laminated beams used in this study beside glulam beams as control. The type 1 using bolts/nails along the span as a connector between laminas. Beam type 2 only using nails/bolts on the one-third span at both ends of the beam, while adhesive on the other space of span. Nails or bolts on beam type 3 is placed on the one-third span at the middle of the beam, and the other space using adhesive. Bending test was conducted by using one-point centre loading method with 90 cm of span. The study concluded that beam type 3 has the highest value of Modulus of Elasticity (MOE) compared to beam type 1 and type 2. The highest MOE for laminated beams is found on nail-laminated beam with diameter of 0.3 cm type 3 (52162.95 kg/cm2) while the lowest one is on nail-laminated beam with diameter of 0.3 cm type 1 (11077.41 kg/cm2). The highest Modulus of Rupture (MOR) is found on nail-laminated beam with diameter of 0.3 cm type 3 (368.16 kg/cm2), and the lowest one is on bolt-laminated beam with diameter of 0.5 cm type 3 (207.36 kg/cm2). The control beam has the highest value of MOE and MOR compared to all mechanical-laminated wood beams. Position of bolts, nails, and adhesive on the laminated beams is only affects to MOE. All damage found on the mechanical-laminated beams is in form of flexural collapse and shear failure among laminas.REFERENCESAnshari, B (2006). Pengaruh variasi tekanan kempa terhadap kuat lentur kayu laminasi dari kayu meranti dan keruing. Civil Engineering Dimension. 1(8):25-33.Gere, JM dan Timoshenko, SP (2000). Mekanika Bahan. Suryoatmono B, penerjemah; Hardani W, editor. Jakarta (ID): Penerbit Erlangga. Terjemahan dari: Mechanics of Material Fourth Edition.[JAS] Japanese Agricultural Standard (2003). Glued Laminated Timber. JAS 234:2003.Mardikanto, TR., Karlinasari, L., Bahtiar, ET (2011). Sifat Mekanis Kayu. Bogor (ID): IPB Press.Moody RC., Hernandez, R., Liu, JY (1999). Glued structural members. Di dalam: Wood and Handbook, Wood as Engineering Material. Madison, WI: USDA Forest Service, Forest Product Laboratory.P3HH (2008). Petunjuk Praktis Sifat-Sifat Dasar Jenis Kayu Indonesia. Indonesia (ID): Indonesian Sawmill and Woodworking Association (ISWA) ITTO Project Pd 286/04.Sadiyo, S., Wahyudi, I., Yeyet (2011). Pengaruh diameter dan jumlah paku terhadap kekuatan sambungan geser ganda tiga jenis kayu. Jurnal Ilmu dan Teknologi Hasil Hutan. 4(1): 26-32.Widiati, KY (2001). Pengaruh Tekanan dan Waktu Tekan  terhadap Keteguhan Rekat dan Penetrasi Perekat pada Kayu Lamina Prosiding Seminar Nasional IV MAPEKI; 6-9 Agustus 2001; Samarinda (ID).Yap KHF (1999). Konstruksi Kayu. Bandung (ID): Trimitra Mandiri
Analisis Ketahanan Gempa Rumah Tembokan Beton Bertulang di Perumahan Graha Arradea Yoresta, Fengky Satria
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 24, Nomor 1, JULI 2018
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1122.203 KB) | DOI: 10.14710/mkts.v24i1.18097

Abstract

The concept of earthquake resistant houses is basically that all building components must be well tied each other. In addition, quality of materials and workmanship must also be good so as to produce a strong building when receiving shocks. This study aims to determine whether houses in Perumahan Graha Arradea (Tahap 3 in Ciherang Village, Dramaga Subdistrict, Bogor District - West Java are built following the design principles of earthquake  resistant houses. The research is conducted by observing the construction process at the location. Every stage of the construction process is recorded using a digital camera (Sony Cyber-shot DSC-W730). Interviews are also conducted on related parties to obtain accurate informations. The results conclude that the houses that are built have not met minimum requirements for design of earthquake resistant masonry houses with reinforced concrete frame. In addition to quality of some materials that have not met minimum requirements, the quality of workmanship of building component is also still low. The ties of all building components have not been properly connected.
ANALISIS KEKUATAN SAMBUNGAN GESER GANDA ENAM JENIS KAYU PADA BERBAGAI SESARAN MENURUT DIAMETER DAN JUMLAH BAUT Sucahyo Sadiyo; Imam Wahyudi; Fengky Satria Yoresta; . Nurhasanah; Muhammad Sholihin
PERENNIAL Vol. 8 No. 2 (2012)
Publisher : Forestry Faculty of Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v8i2.215

Abstract

This research aims to determine the effect of double shear connection strength of six types of timber in various displacement based on diameter and the number of bolts. Six types of wood used are bangkirai, punak, meranti, sengon, bintangur and kapur. Double shear connection consists of the main member (wood) and side member (steel plate) with bolts connected. The average moisture content of sengon, meranti, bintangur and bangkirai are relatively similar (about 12 %), while kapur and punak are slightly higher at around 14 %. In contrast, the average density of six wood species are greatly vary ranging from the lowest sengon 0.26 g cm-3, to the highest 0.82 g cm-3 of bangkirai wood. The total load and load per bolt on double shear connection using bolts connector are influenced by the type of wood, diameter and number of bolts. There is a strong tendency that the higher specific gravity or density of the wood makes higher total load and load per bolt on double shear connection for each displacement. In addition, an increasing number of bolts makes the total load increased. On the other hand, it decreases load per bolts for each of bolts diameter. The use of 10 pieces of 7.9 mm diameter bolts on double shear connection for almost all type of wood produces the highest average total load compared to the other bolt diameter for both displacement 1.5 mm and 5 mm. In the same connection displacement the highest load per bolt is still obtained from using 7.9 mm bolt diameter but with the use of 4 pieces of bolts for almost all types of wood with the exception for punak and bitangur showing the highest values are obtained from 6 pieces of bolts. Bangkirai wood, kapur, punak, bintangur and meranti can be used as the main member in double shear connection by using bolt with diameter 6.4 mm, 7.9 mm and 9.5 mm because of fulfilling the requirements of PKKI (1961). Key words: Bolts, double shear connections, displacement, total load, load per bolt
Karakteristik Kekuatan Leleh Lentur Baut Besi dengan Beberapa Variasi Diameter Baut Evalina Herawati; Sucahyo Sadiyo; Naresworo Nugroho; Lina Karlinasari; Fengky Satria Yoresta
Jurnal Teknik Sipil Vol 24 No 3 (2017)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2017.24.3.4

Abstract

AbstrakBaut merupakan salah satu jenis alat sambung mekanis atau pengencang yang banyak digunakan dalam sambungan kayu. Penelitian ini bertujuan untuk menentukan kekuatan leleh lentur (Fyb) dari tiga ukuran diameter baut besi yang umum digunakan untuk sambungan kayu dan satu ukuran diameter baut baja sebagai pembanding. Spesifikasi baut yang digunakan dilihat dari dimensi dan komposisi penyusunnya. Nilai Fyb baut diperoleh dari pengujian momen leleh lentur dengan mengacu pada standar ASTM F1575. Hasil pengujian menunjukkan baut besi yang digunakan berasal dari bahan baja karbon rendah sedangkan baut baja berasal dari bahan baja karbon sedang. Nilai Fyb baut baja lebih tinggi dibandingkan baut besi. Nilai Fyb baut besi diameter 1/2 inci berbeda nyata dengan nilai baut diameter 5/8 dan 3/4 inci. Nilai Fyb ketiga diamater baut berada di atas nilai Fyb baut yang tercantum dalam SNI 7973:2013 tentang Spesifikasi desain untuk konstruksi kayu.AbstractBolt is one of the mechanical fasteners that are widely used in wood connections. This study aims to determine the bending yield strength (Fyb) of three measures of bolt diameter made from iron which commonly used for the connection of wood and one measure of bolt diameter made from steel as a comparison. Specifications of bolts used can be seen from the dimensions and composition of the constituent. Testing of the bending yield strength was conducted according to ASTM F1575. The results showed that iron bolts used comes from low carbon steel, while steel bolts derived from medium carbon steel materials. Fyb value of steel bolts was higher than iron bolt. Fyb value of 1/2 inch diameter iron bolts was significantly different from the value of the bolts 5/8 and 3/4 inch in diameter. The Fyb value of three bolt diameter were above the Fyb value listed in SNI 7973:2013 concerning design specification for wood constructions.
An Experimental Study on the Flexural Behavior of Glulam Beam of Pinus Wood (Pinus merkusii) Fengky S Yoresta
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 12, No 1 (2014): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (263.343 KB) | DOI: 10.51850/jitkt.v12i1.80

Abstract

The aimed of this research was to determine the flexural behavior of glulam beam made from pine wood (Pinus merkusii) under various laminate thicknesses and then compared to its solid beam. The material used was pine wood with moisture content of 10% and and polyurethane adhesive (Water based polymer isocyanate, WBPI). Four types of glulam beams (namely, Glulam A, B, C, and D) produced with laminate thickness of 25, 16.67, 12.5, and 10 mm, respectively. Solid beam was also prepared as control. All beams have a cross sectional dimension of (50x50) mm2. Bending test is conducted using a 5 ton capacity of Universal Testing Machine, Instron 330. The results indicated that incerasing in number of laminate to a point tend to increase the values of stiffness and modulus of rupture (MOR) of glulam beams. However, the higher of laminate thickness tends to decrease the stiffness and MOR values. Energy absorption of solid beam was noted twice compared to glulam beams.Key words: flexural behavior, glulam beam, modulus of rupture, Pinus merkusii, stiffness
Elastic Load-Deflection Behavior of Timber Laminated Beam on Flexural Test Fengky S Yoresta
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 1 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (474.869 KB) | DOI: 10.51850/jitkt.v13i1.56

Abstract

This research aims to understand the behavior of elastic bending curve on several types of timber laminated beams using bolts and combination of bolt-adhesive as connector among the timber layers. The beams are divided into types A, B, and C based on position of bolts and adhesive on beam. Flexural testing is conducted with one-point loading method using 5 tons capacity of Instron machine. The test results are then compared with theory of beam deflection by Euler-Bernoulli and Timoshenko. The research concludes that Timoshenko beam equation is accurate enough to predict the elastic behavior of beams. Deflection obtained from experiment is about two times larger than Euler-Bernoulli beam and not more than 1% error to Timoshenko.Keywords: adhesive, bolts, elastic behavior, flexural testing, laminated beam
Karakteristik Perubahan Warna dan Kekerasan Kayu Termodifikasi Panas pada Berbagai Suhu dan Jenis Kayu (Color Changes and Hardness Properties of Thermally Modified Wood at Various Temperatures and Wood Species) Lina Karlinasari; Fengky S Yoresta; Trisna Priadi
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 1 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1782.271 KB) | DOI: 10.51850/jitkt.v16i1.443

Abstract

Thermally modified wood by heat treatment are conducted to improve wood quality through high temperature application dealing with to increase dimensional stability and biological durability. However, this treatment can decrease others properties such as mechanical properties and color changes. The aim of this study was to evaluate the color changes as well as hardness properties which undergone heat treatment. Sengon (Paraserianthes falcataria), jabon (Anthocephalus cadamba), and mangium (Acacia mangium) wood species were heat treated at temperature 120, 150, and 180 °C for duration 2 and 6 h. Pretreatments were carried through natural drying and kiln dryer at low temperature 40 °C. The result showed that the temperature and duration of heat treatment were effected on color changes to become darken mainly in jabon and mangium wood. Heat treatment at three temperature which subjected to the samples was not influenced significantly on hardness properties. Pretreatment maintained the moisture content stability but not influenced on wood properties tested.
Co-Authors . Nurhasanah Adiyantara Gumilang Agustina Hayatunnufus Akrom, Akrom Anne Carolina Evalina Herawati Fauzi Febrianto Imam Wahyudi Indrawan, Imam Wahyudi Kenny Setiasih Lina Karlinasari Lona Mahdriani Puspita Muhammad Irsyad Sidiq Muhammad Sholihin Naresworo Nugroho Putri, Ratna Prasetyowati Sadiyo, Sucahyo Sucahyo Sadiyo Sucahyo Sadiyo Trisna PRIADI