Analisis keragaan panel sandwich untuk rumah pra-pabrikasi

In the last five years, several earthquakes struck several places in Indonesia and thousands of people died caused of their masonry house. Therefore, the idea of bamboo utilization in the form of structural sandwich panel components for anti-seismic pre-fabrication house is one of appropriate way out. This research describes the performance and behavior of engineered structure wooden-bamboo sandwich panel in full sized test. The wall frame being use were meranti wood, this frame attached by plywood as face and back, then 5 em bamboo cutting as core; the fastener used in this study were isocyanate resin and nails. This study carried out by experimental data of full scale structural tests on shear wall (ISO 22452). These result showed that the seismic reliability of the wall frame system made of bamboo sandwich panel was appropriate and will be useful for prefabrication houses as anti-seismic and environment friendly residential building

Analisis keragaan panel sandwich untuk rumah pra-pabrikasi

In the last five years, several earthquakes struck several places in Indonesia and thousands of people died caused of their masonry house. Therefore, the idea of bamboo utilization in the form of structural sandwich panel components for anti-seismic pre-fabrication house is one of appropriate way out. This research describes the performance and behavior of engineered structure wooden-bamboo sandwich panel in full sized test. The wall frame being use were meranti wood, this frame attached by plywood as face and back, then 5 em bamboo cutting as core; the fastener used in this study were isocyanate resin and nails. This study carried out by experimental data of full scale structural tests on shear wall (ISO 22452). These result showed that the seismic reliability of the wall frame system made of bamboo sandwich panel was appropriate and will be useful for prefabrication houses as anti-seismic and environment friendly residential building

Ciri Bilah Bambu dan Buluh Utuh pada Bambu Tali dan Bambu Ampel

Bamboo is a natural resource that can be used as a basic commodity to substitute wood. To determine the use of a basic commodity, it is needed to study the basic characteristic of bamboo, in terms of anatomy, physical, and mechanical properties. Some studies of this topic, especially for engineering purpose, have been done, but the most of them used sample experiment in the form of bamboo culm. Therefore, it is necessary to find out whether experiments using bamboo strip are equivalent with the value of bamboo culm. This study used tali and ampel bamboos. The anatomy observation followed the Manual of Anatomy Practical Work and Wood Identification by Pandit (1991) and Nuryatin (2000), tests were based on Nuryatin’s study (2000). Sample tests for mechanical properties were based on ASTM D 143-94 and modification of ISO 22157-1:2004. The results showed that physical properties of internode of tali bamboo were inferior than that of the node, in contrary to ampel bamboo, which was better than that of the node. For all mechanical properties, internodes of tali and ampel bamboos were better than that of the node. The modulus of elasticity of the bamboo culm was lower 110% than that of the bamboo strip and the modulus of rupture of the bamboo culm was lower 230% than that of the bamboo strip. On the other side, τTk// of the bamboo culm was 15% higher than that of the bamboo strip

Ciri Bilah Bambu dan Buluh Utuh pada Bambu Tali dan Bambu Ampel

Bamboo is a natural resource that can be used as a basic commodity to substitute wood. To determine the use of a basic commodity, it is needed to study the basic characteristic of bamboo, in terms of anatomy, physical, and mechanical properties. Some studies of this topic, especially for engineering purpose, have been done, but the most of them used sample experiment in the form of bamboo culm. Therefore, it is necessary to find out whether experiments using bamboo strip are equivalent with the value of bamboo culm. This study used tali and ampel bamboos. The anatomy observation followed the Manual of Anatomy Practical Work and Wood Identification by Pandit (1991) and Nuryatin (2000), tests were based on Nuryatin’s study (2000). Sample tests for mechanical properties were based on ASTM D 143-94 and modification of ISO 22157-1:2004. The results showed that physical properties of internode of tali bamboo were inferior than that of the node, in contrary to ampel bamboo, which was better than that of the node. For all mechanical properties, internodes of tali and ampel bamboos were better than that of the node. The modulus of elasticity of the bamboo culm was lower 110% than that of the bamboo strip and the modulus of rupture of the bamboo culm was lower 230% than that of the bamboo strip. On the other side, τTk// of the bamboo culm was 15% higher than that of the bamboo strip

KARAKTERISTIK CROSS LAMINATED BAMBOO SEBAGAI BAHAN KOMPOSIT STRUKTURAL

The research produced Cross laminated bamboo (CLB) to examine the effect of layer thickness andorientation angle of CLB layer on physical and mechanical properties of CLB products. In this study, thepreparation of the angular variation between CLB layer with an angle between the core and face/back of 0o, 45oand 90o were investigated. The type of bamboo used was betung bamboo splits were cut into size of 115 cm x 2cm with thickness of 0.80 cm, 1.00 cm and 1.33 cm respectively. The CLB products were made with a thicknessof 4 cm by using isocyanate adhesive (glue spread 280 g/m2). Testing was conducted on the test density, moisturecontent, swelling and shrinkage volume, delamination, bonding strength, compresive strength parallel to grain,MOE and MOR with reference to ASTM D 143 (2005), and JAS 1152 (2007). Based on the test results, the valueof delamination, MOE, MOR, and bonding strength were still under the standard requirements of JAS 1152(2007). When compared with CLT (Cross Laminated Timber) products of solid wood which had a value ofcompressive strength parallel to the fiber of 245 kg/cm2, compressive strength parallel to grain value of CLBcould reach 434 kg/cm2.Keywords: cross laminated bamboo, bamboo betung, isocyanate adhesive, physical mechanical propertie

KARAKTERISTIK CROSS LAMINATED BAMBOO SEBAGAI BAHAN KOMPOSIT STRUKTURAL

The research produced Cross laminated bamboo (CLB) to examine the effect of layer thickness andorientation angle of CLB layer on physical and mechanical properties of CLB products. In this study, thepreparation of the angular variation between CLB layer with an angle between the core and face/back of 0o, 45oand 90o were investigated. The type of bamboo used was betung bamboo splits were cut into size of 115 cm x 2cm with thickness of 0.80 cm, 1.00 cm and 1.33 cm respectively. The CLB products were made with a thicknessof 4 cm by using isocyanate adhesive (glue spread 280 g/m2). Testing was conducted on the test density, moisturecontent, swelling and shrinkage volume, delamination, bonding strength, compresive strength parallel to grain,MOE and MOR with reference to ASTM D 143 (2005), and JAS 1152 (2007). Based on the test results, the valueof delamination, MOE, MOR, and bonding strength were still under the standard requirements of JAS 1152(2007). When compared with CLT (Cross Laminated Timber) products of solid wood which had a value ofcompressive strength parallel to the fiber of 245 kg/cm2, compressive strength parallel to grain value of CLBcould reach 434 kg/cm2.Keywords: cross laminated bamboo, bamboo betung, isocyanate adhesive, physical mechanical propertie

Analisis Layer System Bambu Laminasi Berdasarkan Penyebaran Kerapatan Ikatan Pembuluhnya

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

Sifat Mekanis Kayu

Dalam buku ini dibahas tentang hubungan beban, tegangan dalam kayu dan perubahan bentuk yang terjadi akibat beban; sifat elastisitas dan sifat orthotropis kayu; sifat mekanis kayu; pengujian sifat mekanis kayu dan faktor yang mempengaruhi kekuatan kayu. Selain itu dibahas pula tegangan dasar; tegangan ijin; prosedur pengujian di laboratorium; pengantar pemilahan kayu bangunan (stress grading); serta pengujian sifat mekanis kayu komposit.210 Ha

Faktor Stabilitas Balok Kayu pada Konfigurasi Pembebanan Terpusat: Stability Factor of Wooden Beams in One Point Loading

The use of wood as a building material must be designed quite rigid and strong. According to SNI 7973:2013, the corrected design value on the wooden structure components must be in accordance with the condition of wood to be used. The objective of this study is to determine the value of timber beams stability (CL) both of softwood and hardwood based on SNI 7973:2013 for construction purposes. The material in this research to be used are pine (Pinus merkusii), agathis (Agathis dammara), mahagony (Swietenia macrophylla), and red meranti (Shorea leprosula). Testing of physical properties include moisture content, specific gravity, and density, meanwhile testing of mechanical properties include flexural strength, modulus of elasticity, and ductility. Mechanical testing is carried out on a small clear specimens and full-size specimens, while the physical properties are tested only on a small clear specimens. The full-size specimens are visually sorted and the strength ratio (S) is determined prior to mechanical testing. The result of this study showed that the highest strength ratio was in meranti 55.85%, agathis 52.98%, pine 46.76%, and mahogany 46.60%. Softwood has a lower S value to more knot defects than hardwood. The slenderness ratios of agathis, pine, mahogany, and meranti wood respectively are 7.48, 7.45, 7.40 and 7.66 so that all specimens are referred to as short beams. The value of beam stability (CL) is close to 1 that indicates that the beams are stable and does not twist