Surjono Surjokusumo
Fakultas Kehutanan, Institut Pertanian Bogor, Kampus IPB Darmaga Bogor, Jawa Barat, 16680.

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Bamboo Connection Design for Space Truss Member Gina Bachtiar, Gina; Surjokusumo, Surjono; Nugroho, Naresworo; Hadi, Yusuf Sudo
Forum Pasca Sarjana Vol 31, No 1 (2008): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Abstract

Space truss is a three dimensional structure, which can draw forces work on its member either tension or compression without torsion. Space truss is favorable to build a large, light and stiff structure, which are made from relatively short bars.  This research is a feasibility study of using bamboo as space truss members.  This study focuses on designing bamboo connection, that strong enough for both tension and compression.  According to the analysis done, bamboo culm with diameter 4 cm and 6 cm could be use to make space truss member for a simple 3m x 4 m canopy structure.  The critical point of failure was on shear, because the shear strength of bamboo observed was only 3.9kg/cm2.  Designing with uniform length members of one meter, it’s found that for bamboo of 4 cm and 6 cm in diameter, depth of shear area of 5 cm and 3 cm, respectively, are needed.   Keywords: bamboo connection, space truss member, tension, compression
KEKUATAN TEKAN DAN RASIO POISSON KAYU PANGSOR (Ficus callosa WILLD) DAN KECAPI (Sandoricum kucape MERR) WARDANI, Lusita; BAHTIAR, Effendi Tri; SULASTININGSIH, Ignasia Maria; DARWIS, Atmawi; KARLINASARI, Lina; NUGROHO, Naresworo; SURJOKUSUMO, Surjono
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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Abstract

Pangsor (Ficus callosa WILLD) and kecapi (Sandoricum kucape MERR) are usually planted in garden and rural forest. The objective of this study was to determine its specific gravity (SG), maximum crushing strength (σc//), longitudinal modulus elasticity (EL), and Poisson’s ratio (n).  The compression test  was conducted referring to  ASTM D143-94(2000) using UTM Instron 3369 which is equipped with two biaxial clip on extensometers.  The result showed that vertical and horizontal position of wood in the trees statistically significant influenced on SG and σc//.  Horizontal position in Pangsor wood affected its EL, but the other position in both species were not significantly different.  There were poor correlations between SG with EL and σc//.   Poisson’s ratio value of both woods were in a range 0.0045 – 0.275 for longitudinal-radial direction (nLR), and 0.0151 – 0.1289 for longitudinal-tangensial direction (nLT).   Keywords :    Longitudinal Modulus of Elasticity, Maximum Crushing Strength, Poisson’s Ratio, Pangsor wood, Kecapi wood
SEBARAN DAN KARAKTER MORFOLOGI RAYAP TANAH Macrotermes gilvus Hagen DI HABITAT HUTAN ALAM SUBEKTI, Niken; DURYADI, Dedy; NANDIKA, Dodi; SURJOKUSUMO, Surjono; ANWAR, Syaiful
Jurnal Ilmu dan Teknologi Hasil Hutan Vol 1, No 1 (2008): Jurnal Ilmu Teknologi Hasil Hutan
Publisher : Departemen Hasil Hutan, IPB

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Abstract

Subterranean termite, Macrotermes, play important role on plant nutritive cycles through disintegration and decomposition of organic matter processes.  In the other hand, subterranean termite can cause wooden damage in the nature and human dormitory as well. Therefore, Macrotermes are potential pest and need to be controlled.  Effective pest-control of subterranean termite can be made when their species status and distribution are well known. This research is aimed to identify the status of species and the dispersal of Macrotermes at their natural habitat in order to explore natural bio-resources richness and as an effort towards effective pest-control due to increasing risk of attack.  Survey method was used termite samples were collected at four different locations which are defined by global positioning system (GPS).  Nest classification is according to Meyer et al. (2003). The nest mapping is based on the elevations of their natural habitat in Gunung Halimun Salak National Park (900-1000 asl), and (600-700 asl), Yanlappa sanctuary (200-300 asl), and Ujung Kulon Nasional Park (0-100 asl). Phylogenetic relationships analysis showed that subterranean termite Macrotermes in the natural forest community are belongs to one big group Macrotermes gilvus Hagen. Based on nest size, the colony of Macrotermes can be classified into three different sizes: large, medium, and small nest.  Large and medium nest can be found in large amount in Yanlappa sanctuary (15 and 23 colonies, respectively) and the majority of small nest occurred in Gunung Halimun Salak National Park at 900 asl (78 colonies). Temperature and humidity is the most environmental factor that can influence on termite and other factor is rain fall, soil structure, and plant vegetation.   Keywords:  Distribution, identify, Macrotermes gilvus Hagen, nest
NILAI DISAIN LATERAL SAMBUNGAN GESER GANDA BATANG KAYU TROPIS DENGAN PAKU BERPELAT SISI BAJA SADIYO, Sucahyo; NUGROHO, Naresworo; SURJOKUSUMO, Surjono; WAHYUDI, Imam
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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Abstract

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
KAJIAN KONSEP DESAIN TAMAN DAN RUMAH TINGGAL HEMAT ENERGI Kurniawaty, Prima; Gunawan, Andi; Surjokusumo, Surjono
Jurnal Lanskap Indonesia Vol 4, No 1 (2012): Jurnal Lanskap Indonesia (JLI)
Publisher : http://web.ipb.ac.id/~landscapearch/

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Abstract

The primary factor of high energy consumption in housing sector is caused by unconformity between architectural and landscape design. Housing design which has been developed and adopted by people now is more oriented towards building aspect and in current trends design, but lack of environmental and landscape aspect. The environment and landscape aspects has a profound influence as the results of this study. Using Analytical Hierarchy Process (AHP) method, the study results in the influence of landscape (site design) on energy saving in housing landscape unit is very significant (67%) compared to building design (33%). In this case, the plant is a ma-jor component that contribute to energy saving design (48.3%). The Criteria for each component are discussed specifically in this paper, both physically and visually.
Teknik Rekayasa Pemadatan Kayu II : Sifat Fisik dan Mekanik Kayu Agatis (Agathis lorantifolia Salisb.) Terpadatkan dalam Konstruksi Bangunan Kayu ., Sulistyono; Nugroho, Naresworo; Surjokusumo, Surjono
Jurnal Keteknikan Pertanian Vol 17, No 1 (2003): Buletin Keteknikan Pertanian
Publisher : PERTETA

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Abstract

Pemadatan kayu dapat dilakukan dengan dua langkah utama, yaitu perlakuan perendaman, perebusan dan pengukusan agar kayu bersifat plastis dan perlakuan pemadatan pada arah tegak lurus serat. Proses plastisasi dan pemadatan kayu yang sesuai dapat meningkatkan sifat fisik dan sifat mekanik kayu terpadatkan dan berkualitas tinggi. Kualitas yang dimaksud adalah kemudahan proses pemadatan, stabilitas dimensi, keseragaman dan peningkatan kekuatan papan kayu, kehalusan corak permukaan papan dan fiksasi permanen.
Analisis Layer System Bambu Laminasi Berdasarkan Penyebaran Kerapatan Ikatan Pembuluhnya Bahtiar, Effendi Tri; Nugroho, Naresworo; Surjokusumo, Surjono; Karlinasari, Lina; Darwis, Atmawi
Jurnal Ilmu Pertanian Indonesia Vol 18, No 1 (2013): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

Anatomically, bamboo is constructed from many types of cells. Vascular bundles are the cells which give the highest contribution to the bamboo strength, thus the density distribution of vascular bundles could be used as the main variable for analyzing the layer system of bamboo strip and laminated bamboo. The density of vascular bundles distribution decreases gradually from the outer to inner part in a regular manner which could be fitted by linear or nonlinear function. Ratio of modulus of elasticity (E) which widely used in transformed cross section (TCC) method for analyzing the layer system are substituted by ratio of density distribution of vascular bundles with asumption that both are highly correlated. The data in this study proved that there are high Pearson’s corellation between the theoretical and the empirical result, and the paired t-student test also showed both are not significantly different; thus, this new method could be applied in very good result. There are 3 models applied in this study, namely linear, logarithm, and power. Power model is the best among others since its theoretical gives the nearest estimation to the empirical measurement. Keywords: bamboo and laminated bamboo, mechanical properties, model, transformed cross section, vascular bundles
Teknik Rekayasa Pemadatan Kayu II : Sifat Fisik dan Mekanik Kayu Agatis (Agathis lorantifolia Salisb.) Terpadatkan dalam Konstruksi Bangunan Kayu ., Sulistyono; Nugroho, Naresworo; Surjokusumo, Surjono
Jurnal Keteknikan Pertanian Vol 17, No 1 (2003): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pemadatan kayu dapat dilakukan dengan dua langkah utama, yaitu perlakuan perendaman, perebusan dan pengukusan agar kayu bersifat plastis dan perlakuan pemadatan pada arah tegak lurus serat. Proses plastisasi dan pemadatan kayu yang sesuai dapat meningkatkan sifat fisik dan sifat mekanik kayu terpadatkan dan berkualitas tinggi. Kualitas yang dimaksud adalah kemudahan proses pemadatan, stabilitas dimensi, keseragaman dan peningkatan kekuatan papan kayu, kehalusan corak permukaan papan dan fiksasi permanen.
Analisis Layer System Bambu Laminasi Berdasarkan Penyebaran Kerapatan Ikatan Pembuluhnya Bahtiar, Effendi Tri; Nugroho, Naresworo; Surjokusumo, Surjono; Karlinasari, Lina; Darwis, Atmawi
Jurnal Ilmu Pertanian Indonesia Vol 18, No 1 (2013): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1654.066 KB)

Abstract

Anatomically, bamboo is constructed from many types of cells. Vascular bundles are the cells which give the highest contribution to the bamboo strength, thus the density distribution of vascular bundles could be used as the main variable for analyzing the layer system of bamboo strip and laminated bamboo. The density of vascular bundles distribution decreases gradually from the outer to inner part in a regular manner which could be fitted by linear or nonlinear function. Ratio of modulus of elasticity (E) which widely used in transformed cross section (TCC) method for analyzing the layer system are substituted by ratio of density distribution of vascular bundles with asumption that both are highly correlated. The data in this study proved that there are high Pearson?s corellation between the theoretical and the empirical result, and the paired t-student test also showed both are not significantly different; thus, this new method could be applied in very good result. There are 3 models applied in this study, namely linear, logarithm, and power. Power model is the best among others since its theoretical gives the nearest estimation to the empirical measurement.
Rasio Ikatan Pembuluh sebagai Substitusi Rasio Modulus Elastisitas pada Analisa Layer System pada Bilah Bambu dan Bambu Laminasi Bahtiar, Effendi Tri; Nugroho, Naresworo; Karlinasari, Lina; Darwis, Atmawi; Surjokusumo, Surjono
Jurnal Teknik Sipil Vol 21, No 2 (2014)
Publisher : Institut Teknologi Bandung

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Abstract

Abstrak. Anatomi bambu disusun oleh sel-sel yang heterogen. Komponen anatomi bambu yang memberikan sumbangan terbesar pada sifat mekanisnya adalah ikatan pembuluh, sehingga kerapatan ikatan pembuluh dapat digunakan sebagai variabel dasar untuk menganalisa sifat mekanis bambu. Kerapatan ikatan pembuluh bergradasi dari tepi hingga ke dalam bambu sehingga dapat diturunkan suatu fungsi linier ataupun non linier sebagai pendekatannya. Rasio modulus elastisitas (E) yang lazim digunakan pada metode transformed cross section, pada penelitian ini dicoba diganti dengan rasio ikatan pembuluh dengan asumsi bahwa keduanya adalah ekuivalen. Hasil penelitian memperlihatkan bahwa terdapat nilai korelasi Pearson yang tinggi antara hasil teoritis dan hasil empiris, sedangkan hasil uji t-student data berpasangan menunjukkan bahwa tidak ada perbedaan yang signifikan antara keduanya. Dengan demikian model transformasi yang diturunkan dapat digunakan untuk melakukan analisa layer system pada bilah bambu maupun bambu laminasi dengan hasil yang dapat dipertanggungjawabkan. Dari ketiga model transformasi terpilih (linier, logaritmik, dan power) model power adalah model yang terbaik karena menghasilkan nilai yang paling mendekati data empiriknya.Abstract. Bamboo anatomy is constructed from many types of cells. Vascular bundles are the cells which give the highest contribution to the bamboo strength, thus the density distribution of vascular bundles could be used as the main variable for analyzing the layer system of bamboo strip and laminated bamboo. The density of vascular bundles distribution degrade from outer to inner in a regular manner which could be fitted by linear and nonlinear function. Ratio of modulus of Elasticity (E) which widely used in transformed cross section method for analyzing the layered system was substituted by ratio of density distribution of vascular bundles within assumption that both are highly correlated. The data in this study proved that there was high Pearson’s correlation between the theoretical and empirical result, and the paired t-student test also showed both were not significantly different; thus the new method could be applied in very good result. There are three model applied in this study namely linear, logarithm, and power. Power model is the best among others since its theoretical results the nearest estimation to the empirical measurement.