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Nilai Kekuatan Tumpu Baut pada Empat Jenis Kayu Rakyat Indonesia Sadiyo, Sucahyo; Susanto, Dwi; Pratiwi, Nanda Elsa Sara
Jurnal Teknik Sipil Vol 24, No 2 (2017)
Publisher : Institut Teknologi Bandung

AbstrakKekuatan tumpu baut merupakan salah satu parameter penting yang memengaruhi nilai desain rujukan (Z) padaÂ sambungan tipe dowel. Di Indonesia penentuan nilai kekuatan tumpu baut dapat ditentukan berdasarkan SNI 7973-2013 yang mengadopsi standar NDS. Penelitian ini dilakukan untuk menentukan nilai kekuatan tumpu bautÂ menggunakan tiga ukuran diameter baut (1/2 in, 5/8 in, dan 3/4 in) dan empat jenis kayu rakyat Indonesia yaituÂ sengon (Paraserianthes falcataria), jabon (Anthocephalus cadamba), manii (Maesopsis eminii) dan nangkaÂ (Artocarpus heterophyllus) kemudian membandingkannya dengan SNI 7973. Hasil pengujian menunjukkan nilaiÂ kekuatan tumpu baut dipengaruhi oleh kerapatan dan berat jenis kayu. Nilai kekuatan tekan maksimum sejajarÂ serat dapat digunakan sebagai parameter dalam menduga nilai kekuatan tumpu baut yang dihasilkan. SemakinÂ tinggi kekuatan tekan maksimum sejajar serat maka kekuatan tumpu baut yang dihasilkan akan semakin tinggiÂ pula. Nilai kekuatan tumpu baut berdasarkan jenis kayu berturut-turut yaitu sengon 161 kg/cm2, jabon 151 kg/cm2,Â manii 243 kg/cm2 dan nangka 392 kg/cm2. Baut dengan diameter 1/2 in memiliki nilai kekuatan tumpu baut tertinggi kecuali pada kayu jabon. Perbandingan nilai kekuatan tumpu baut pada kayu sengon dan jabon terhadapÂ SNI 7973 cukup signifikan (16-27%) sedangkan pada kayu manii dan nangka tidak signifikan (2-3%).AbstractThe fasteners bearing strength is one of the properties that affect reference design value (Z) on dowel-typeÂ connections. In Indonesia, the value of bolt bearing strength can be determined in theory by SNI 7973 which adoptÂ NDS standard. This study was conducted to determine the bolt bearing strength by using three bolts diameter (1/2Â in, 5/8 in and 3/4 in) and four Indonesian woods community species which are sengon (Paraserianthes falcataria),Â jabon (Anthocephalus cadamba), manii (Maesopsis eminii) and nangka (Artocarpus heterophyllus) compared withÂ SNI 7973. The results showed that bolt bearing strength can be affected by density and specific gravity. Moreover,Â the compression strength parallel to grain can be used as a parameter to predict bolt bearing strength. The higherÂ compression strength parallel to grain, the higher bolt bearing strength will be. The bolt bearing strength based onÂ wood species were sengon 161 kg/cm2, jabon 151 kg/cm2, manii 243 kg/cm2 and nangka 392 kg/cm2 respectively.Â Bolt with 1/2 in diameter has the highest bolt bearing strength except for jabon wood. The difference of bolt bearingÂ strength on sengon and jabon versus SNI 7973 was differ significantly by 16-27% while the bolt bearing strength onÂ manii and nangka was not differ significantly by 2-3%.

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

AbstrakBaut merupakan salah satu jenis alat sambung mekanis atau pengencang yang banyak digunakan dalamÂ sambungan kayu. Penelitian ini bertujuan untuk menentukan kekuatan leleh lentur (Fyb) dari tiga ukuran diameterÂ baut besi yang umum digunakan untuk sambungan kayu dan satu ukuran diameter baut baja sebagai pembanding.Â Spesifikasi baut yang digunakan dilihat dari dimensi dan komposisi penyusunnya. Nilai FybÂ baut diperoleh dariÂ pengujian momen leleh lentur dengan mengacu pada standar ASTM F1575. Hasil pengujian menunjukkan baut besiÂ yang digunakan berasal dari bahan baja karbon rendah sedangkan baut baja berasal dari bahan baja karbonÂ sedang. Nilai FybÂ baut baja lebih tinggi dibandingkan baut besi. Nilai FybÂ baut besi diameter 1/2 inci berbeda nyataÂ dengan nilai baut diameter 5/8 dan 3/4 inci. Nilai FybÂ ketiga diamater baut berada di atas nilai FybÂ baut yangÂ 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 theÂ bending yield strength (Fyb) of three measures of bolt diameter made from iron which commonly used for theÂ connection of wood and one measure of bolt diameter made from steel as a comparison. Specifications of bolts usedÂ can be seen from the dimensions and composition of the constituent. Testing of the bending yield strength wasÂ conducted according to ASTM F1575. The results showed that iron bolts used comes from low carbon steel, whileÂ steel bolts derived from medium carbon steel materials. FybÂ value of steel bolts was higher than iron bolt. FybÂ valueÂ of 1/2 inch diameter iron bolts was significantly different from the value of the bolts 5/8 and 3/4 inch in diameter.Â The FybÂ value of three bolt diameter were above the FybÂ value listed in SNI 7973:2013 concerning designÂ specification for wood constructions.

Desain Kekuatan Sambungan Geser Tunggal Menggunakan Paku pada Lima Jenis Kayu Indonesia Sutanto, Riezky Rakamuliawan; Sadiyo, Sucahyo; Nugroho, Naresworo
Jurnal Teknik Sipil Vol 25, No 1 (2018)
Publisher : Institut Teknologi Bandung

AbstrakStandar Nasional Indonesia (SNI) 7973 (2013) adalah standar yang umum digunakan dalam penentuan konstruksi kayu di Indonesia. Dalam SNI-7973 terdapat cara penentuan nilai desain sambungan kayu secara teoritis yang saat ini masih mengadopsi nilai-nilai yang diperoleh dari National Desain Specification (NDS) (2012). NDS sendiri disusun berdasarkan sifat-sifat kayu berdaun jarum yang umum digunakan di Amerika. Nilai-nilai yang diadopsi tersebut tentunya meningkatkan resiko ketidaksesuaian jika digunakan langsung di Indonesia, hal ini karena Indonesia sebagai negara tropis memilki kayu dengan rentang berat jenis yang lebih besar dan didominasi oleh kayu berdaun lebar dengan struktur anatomi yang berbeda. Penelitian ini membandingkan nilai desain sambungan kayu yang diperoleh dari pengujian secara empiris dengan nilai desain sambungan yang dihasilkan secara teoritis berdasarkan SNI-7973 dan Eurocode 5 (EC-5) (2004). Hasil penelitian menunjukan nilai desain sambungan kayu terendah diperoleh pada sambungan kayu Paraserienthes falcataria menggunakan paku 10 cm sebesar 53.66 kgf dan nilai tertinggi diperoleh pada sambungan kayu Shorea laevifolia menggunakan paku 15 cm sebesar 149.89 kgf. Penentuan nilai desain teoritis SNI-7973 menghasilkan nilai lebih rendah sebesar 13.65% sedangkan EC-5 menghasilkan nilai lebih tinggi 8.87% dibandingkan nilai yang diperoleh pada pengujian empiris.AbstractStandar Nasional Indonesia (SNI) 7973 (2013) is a standard that commonly used in the determination of wood construction in Indonesia. In SNI-7973 there is a theoretical method to determining the design value of wood connection that currently still adopt the values derived from National Design Specification (NDS) (2012). NDS itself is structured based on the properties of softwood that commonly used in America. The values adopted are certainly increase the risk of incompatibility if used directly in Indonesia, this is because Indonesia as a tropical country has wood with wider range of specific gravity and dominated by hardwood with different anatomical structures. This study compares the value of single shear wooden connection design obtained from empirical testing with theoretically generated connection values based on SNI-7973 and Eurocode 5 (EC-5) (2004). The results showed the lowest design value of wood connections obtained on Paraserienthes falcataria wood connection using 10 cm nail by53.66 kgf and the highest value obtained on Shorea laevifolia wood connection using 15 cm nail by 149.89 kgf. The determination of the theoretical design value based on SNI-7973 yielded a lower value of 13.65% while EC-5 yielded a higher value of 8.87% than the value obtained from empirical testing.Â

Connection is the weakest point of the structural building system. Structural construction building system must ensure that there is only a tensile force or just axial compression that is working on the connection. Data on the lateral design values (Z) double shear connection wood beam with nails of steel side plates for various types of tropical Indonesian wood have not studied much. Average moisture content (MC) for the main member varies from 13.3 to 22.5% while average specific gravity (r) f Sucahyo SADIYO; Naresworo NUGROHO; Surjono SURJOKUSUMO; Imam WAHYUDI
Jurnal Ilmu dan Teknologi Hasil Hutan Vol. 3 No. 1 (2010): Jurnal Ilmu Teknologi Hasil Hutan
Publisher : Departemen Hasil Hutan, IPB

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Connection is the weakest point of the structural building system. Structural construction building system must ensure that there is only a tensile force or just axial compression that is working on the connection. Data on the lateral design values (Z) double shear connection wood beam with nails of steel side plates for various types of tropical Indonesian wood have not studied much. Average moisture content (MC) for the main member varies from 13.3 to 22.5% while average specific gravity (r) from 0.27 to 0.76 and then wood density from 0.31 to 0.89 g/cm3. From this average value of MC, SG and wood density the lowest is sengon and the highest is rasamala wood. Average allowable load of compression parallel to grain ( ) and parallel tensile ( )is sengon, but the highest is bangkirai. There is a general tendency that and is linier to r of those wood. is approximately 2 times greater than its . The number of nail (4-10 pieces) did not give effect of average Z, but with the nail diameter 4.1 to 5.2 mm Z increased significantly and this value decreased on 5.5 mm diameter nail. Average Z also increases with increasing of ρ for displacement 1.50 mm (Indonesian Standard PKKI NI-5 1961)) and 5.0 mm (breaking load). The increasing of Z happens because ρ effect. At 5.0 mm displacement the increase of Z is not as sharp as that of 1.5 mm. Power regression type is the best equation to predict Z of wood density for several diameters of nails. Keywords : Allowable load of tensile parallel to grain, density, displacement, double shear connection, lateral design values

The use of wood as a construction material is still the primary choice for most Indonesian people. For the purposes of structural construction, it would require a long span of wood, whereas stock in the market is limited, so usually it is overcomed with joint technique which can be done with type of joint and connector. Kind of joint that is needed to be considered seriously is tensile, shear and moment joint. Nail joint is relatively cheap and easy to be done. Variables which are used to see an Sucahyo SADIYO; Imam WAHYUDI; Yeyet .
Jurnal Ilmu dan Teknologi Hasil Hutan Vol. 4 No. 1 (2011): Jurnal Ilmu Teknologi Hasil Hutan
Publisher : Departemen Hasil Hutan, IPB

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The use of wood as a construction material is still the primary choice for most Indonesian people. For the purposes of structural construction, it would require a long span of wood, whereas stock in the market is limited, so usually it is overcomed with joint technique which can be done with type of joint and connector. Kind of joint that is needed to be considered seriously is tensile, shear and moment joint. Nail joint is relatively cheap and easy to be done. Variables which are used to see and predict the level of allowable load for a nail joint are diameter and number of nails. Therefore, the objective of this research was to know the influence from the variables to the strength of joints under uni-axial compression loading from 3 wood species. The results showed that double shear connections strength of nangka wood (allowable load per nail and also total load) has the highest value compared with rasamala and sengon. Nangka wood also reached the highest value for maximum crushing strength. Maximum crushing strength had positive relationship with double shear connections strength. Based on the result of this research, maximum crushing strength is applicable to predict the strength of nails. Keywords : allowable load, maximum crushing strength, nails, double shear connections, tensile joint

PERBAIKAN KARAKTERISTIK KAYU KELAPA HIBRIDA MELALUI METODE PEMANASAN DAN PEMADATAN . Suhasman; Sucahyo Sadiyo; Zahrial Coto
PERENNIAL Vol. 5 No. 1 (2009)
Publisher : Forestry Faculty of Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v5i1.183

For optimum utilization of coconut wood, there are necessity to improve the quality of the wood caused by higroscopicity, low dimensional stability, and extreme variability of dimension in lateral direction. The purpose of the research were to analyze the characteristics of coconut wood that had been treated by heating and densification. The treatment consist of one or two hours heating, one hour heating combined to 10 or 20% densification, two hours heating combined to 10 or 20% densification. Temperature that applied for all specimen were 180 oC. The research results are as follows: (1) Heating treatment combined to densification effective to reduce higroscopicity of coconut wood, (2) Heating treatment for two hours are suffice as pretreatment to densify the soft part of coconut wood for 20%, (3) Dimensional stability of coconut wood may improve using heating combined to densification treatments that indicated by decreasing rate of dimensional change, (4) Heating and densification treatment effective to improve the hardness of soft part coconut wood. Keywords : coconut wood, heating treatment, densification References

NILAI DESAIN ACUAN SAMBUNGAN KAYU GESER GANDA DENGAN PAKU BERPELAT SISI BAJA AKIBAT BEBAN UNI-AKSIAL TEKAN MENURUT BERBAGAI ANALISIS PENDEKATAN Sucahyo Sadiyo; Naresworo Nugroho; Surjono Surjokusumo; Imam Wahyudi
PERENNIAL Vol. 6 No. 1 (2010)
Publisher : Forestry Faculty of Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v6i1.191

The purposes of this research are to know the influence of woods specific gravity and nail diameter to reference design value in double shear timber connections with steel side plates nail on four species of Indonesian commercial wood according to various approximation analysis. Analysis is done to four values and it is compared with other research that has been done. This research result from testing which have done by Ziannita (2009) referred as approach of A; result of research of Sadiyo and Sriyanto (2009) and Mansur (2009) referred as approach of B; values referring at literature referred as approach of C and compressive-joint total load divided by nail amount and factor of safety referred as approach of D (Sadiyo and Sriyanto, 2009 and Mansur, 2009). Joint done by using four species of Indonesian commercial wood which is meranti merah (Shorea leprosula), mabang (Shorea pachyphylla), kempas (Koompassia malaccensis) and bangkirai (Shorea laevifolia). Nails that applied in this research are nail with diameter of 4.1 mm length of 10 cm, nail with diameter of 5.2 mm length of 12.5 cm and nail with diameter of 5.5 mm length of 15 cm. The calculation of this research is done according to National Design Specification for Wood Construction-2005. Analysis results indicate that wood specific gravity influence the strength of connection, excelsior wood specific gravity will produce high strength of connection also. This can be influenced by mechanical properties from wood such as maximum crushing strength. Bangkirai have higher specific gravity than three others wood but result approach of D shows that the connections assess reference design value which is lower compared with two other woods (kempas and mabang wood). Then, the bigger on nail diameter brings bigger strength of connection also, but this thing depends on the conditions from nail and quality of nail materials. Key words: compression loading, double shear connections, nail, reference design value, steel side plates.

PENGARUH DIAMETER DAN JUMLAH PAKU TERHADAP KEKUATAN SAMBUNGAN GESER GANDA BALOK KAYU NANGKA (Artocarpus heterophyllus) dan RASAMALA (Altingia excelsa Noronha) DENGAN PELAT BAJA Sucahyo Sadiyo; Emma Yusrina Wulandari
PERENNIAL Vol. 8 No. 1 (2012)
Publisher : Forestry Faculty of Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v8i1.213

The application of nail connection for part of the structural construction in Indonesia is still become the main choice. Connection type that must be counted on seriously for structural construction, are tension, shear and momen connection. Nangka wood is a type of woods that available in sawing or community woods work around Bogor. Rasamala is endemic and unique woods from West Java. Nails as connection are cheap, available and workable. This research objective is to investigate the effect of diameter and amount of nails to double shear connection strength on two type of woods. The results showed that the increase of diameter and amount of nail will rise the capacity of total allowable load per shear plane (RT) or double shear connection strength of nangka woods and rasamala-steel plate, but this phenomena is different for allowable load capacity per nail per shear plane (R) for both of that type. Design value for nangka wood based on diameter size 4,1; 5,2 and 5,5 mm are 261; 358 and 365 kg respectively, and for rasamala wood the design value is sligthly low, which is 227; 311 and 321 kg respectively. The minimum value becomes fundamental for determining design value of total allowable load per shear plane connection (RT) based on amount of nail (4-10), which is determined by multiply the value of certain type woods with amount of nails used. Key words: double shear, displacement, allowable load per nail per shear plane (R), total allowable load per shear plane (RT)

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

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

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.

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