KEKUATAN BAMBU BETUNG (Dendrocalamus asper Backer ex K.Heyne) MENAHAN GAYA NORMAL TEKANAN DAN TARIKAN

Nugroho, Naresworo; Bahtiar, Effendi Tri; Lelono, Arya Budhijatmiko

doi:10.20886/jphh.2022.40.1.37-48

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…The warm, humid, and rainy environments result in wood's high equilibrium moisture content. This study measured that the specimen's average air-dry moisture contents ranged from 15.92% to 17.13%, in line with some research reports on wood [17,[56][57][58][59] or bamboo [60][61][62][63][64][65] located in Bogor (ID), but wetter than the equilibrium moisture content (EMC) in the subtropical region such as Coventry (UK) [66,67]. The air-dry timber is wetter than mortar [68].…”

Section: The Physical Propertiessupporting

confidence: 82%

Comparing the Building Code Sawn Lumber’s Wet Service Factors (CM) with Four Commercial Wood Species Laboratory Tests

Bahtiar

Denih

Priadi

et al. 2022

Forests

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Indonesian Wooden Building Code (SNI 7973-2013) has adopted the National Design Specification (NDS) for Wood Construction since 2013. A periodic harmonization of the building-code-designated values (i.e., reference design values and adjustment factors) with the experimental data of commercial wood species is necessary. This study aimed to compare the building code’s wet service factors (CM) with the laboratory test of some commercial wood species. Since wood is weaker when its moisture content is high, the wet service factor (CM) must adjust the sawn lumber reference design values if the building serves in wet or aquatic environments. Four commercial wood species, namely pine (Pinus merkusii), agathis (Agathis dammara), red meranti (Shorea leprosula), and mahogany (Swietenia mahagoni), were subjected to mechanical property tests. To calculate the empirical CM values, the mechanical properties tests were conducted on air-dry and wet wood. Instead of testing the full-sized timber, which contains the growth characteristics and defects, this study chose clear-wood specimens to resemble the boundary condition of the ceteris paribus (other things being equal). The wet (water-saturated) specimens were immersed in water for 65 days, and the test was carried out when the specimen was still immersed. The test arrangement imitated the submerged wood as the worst-case scenario of the wet environment where the construction serves, rather than green or partially immersed timber. As many as 40 specimens were tested to compare each mechanical property’s wet service factor; thus, this study reported 200 specimens’ laboratory test results. The empirical CM values to adjust the modulus of elasticity, modulus of rupture, shear strength parallel-to-grain, tensile strength parallel-to-grain, and maximum crushing strength (CM = 0.59, 0.76, 0.65, 0.73, and 0.67, respectively) were significantly lower than SNI 7973-2013 designated values (CM = 0.9, 0.85, 0.97, 1, and 0.8, respectively). The empirical CM for the compression stress perpendicular-to-grain at the proportional limit and that at the 0.04″ deformation (CM = 0.66) were slightly lower than the designated values (CM = 0.67), although they were not significantly different. This study resulted in lower empirical CM values than the designated ones, which found that the building code lacked conservativeness. The lacked conservativeness is mainly attributed to the building code’s recent choices, e.g., (1) the wet service environment basis is the green timber rather than the fully water-saturated one, and (2) the ratio of near minimum (5% lower) distribution value is chosen as the CM value rather than the average of wet timber’s mechanical property divided by the air-dry one. This study proposes changing both recent choices to alternative ones to develop more safe and reliable designated CM values.

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Section: The Physical Propertiessupporting

confidence: 82%

Comparing the Building Code Sawn Lumber’s Wet Service Factors (CM) with Four Commercial Wood Species Laboratory Tests

Bahtiar

Denih

Priadi

et al. 2022

Forests

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“…Pemanfaatan bambu sebagai bahan konstruksi bangunan menjadi produk komersil memiliki keuntungan yaitu bersifat elastis, mudah dibentuk, mudah direparasi apabila terjadi kerusakan, serta tahan dari tekanan gempa (Febrianto et al, 2017;Nugroho et al, 2022). Disisi lain, bambu memiliki kelemahan terhadap kekuatan tarik tegak lurus serat.…”

Section: Pendahuluanunclassified

Evaluasi Kekuatan Oriented Strand Board (Osb) Bambu Andong Pada Berbagai Rasio Lapisan Face-Core Berdasarkan Pengujian Non-Destruktif Dan Destruktif

Ningsih,

Karlinasari

2023

J. Penelitian Hasil Hutan

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Oriented strand board (OSB) merupakan produk papan komposit struktural yang dapat dibuat dari bahan berlignoselulosa seperti kayu dan bambu. Penelitian ini bertujuan untuk mengevaluasi hubungan antara pengujian non-destruktif metode kecepatan gelombang bunyi (stress wave velocity, SWV) dan pengujian destruktif ((modulus of elasticity, MOE) dan modulus of rupture, MOR)) OSB yang terbuat dari strand bambu andong (Gigantochloa verticillata Munro). Strand bambu diberi perlakuan steam dengan cara memasukkan strand bambu ke dalam autoklaf pada suhu 126°C dan tekanan 1,4 kg/cm2 selama 1 jam. Perekat yang digunakan adalah fenol formaldehida (PF) dengan kadar 8% dan penambahan parafin sebanyak 1% berdasarkan berat kering oven strand bambu. OSB dibuat tiga lapisan yaitu lapisan inti tegak lurus strand bambu terhadap lapisan muka pada berbagai rasio lapisan muka:inti (face:core:face) papan yang berbeda (25:50:25, 27,5:45:27,5, 30:40:30, 32,5:35:32,5, 35:30:35, dan 37,5:25:37,5). Nilai SWV dihitung menggunakan waktu rambatan gelombang dan digunakan untuk mengukur nilai modulus elastis dinamis (MOEd). Hasil penelitian menunjukkan bahwa semakin tinggi komposisi lapisan permukaan (face) pada arah sejajar panjang strand bambu dapat meningkatkan sifat mekanis papan OSB. Komposisi rasio lapisan face-core mempengaruhi sifat mekanis papan (MOE, MOR, SWV, dan MOEd). Terdapat hubungan yang baik antara pengujian non-destruktif berbasis gelombang bunyi dengan pengujian destruktif yang menggunakan model regresi linear.

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“…and ndolo (Imperata conferta (J.Presl) Ohwi.) which are used as construction materials that are known for their elastic properties so that they are resistant to earthquake shocks and are easily renovated if damage occurs (Nugroho, et al ., 2022). Ater bamboo (Gigantochloa atter Kurz.)…”

Section: Figure 12 Procession Ampa Fare Aspect Botany and Conservatio...mentioning

confidence: 99%

Bima Traditional House Ethnobotany: Uma Lengge

Yusmerianti,

Khairuddin,

Mertha

2023

jppipa, pendidikan ipa, fisika, biologi, kimia

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Ethnobotany is a science that explains the knowledge of traditional communities on the use of plants to support their lives. One of the uses of plants for traditional building materials can be seen in the Uma Lengge building which is a traditional building located in the Wawo District, Bima Regency, West Nusa Tenggara. This building used to function as a residence for the Mbojo tribe. However, along with the development of the times, the function of the building has been transferred only as a place to store rice. This research aims to analyze the types of constituent plants and explore information about the local wisdom contained in Uma Lengge's architecture. This research type is qualitative using descriptive methods and plant anatomy approaches. Data collection is done using observations, interviews, and documentation. The selection of informants used the snowball sampling method. Based on the results of the study 7 types of plants were used as constituents for the construction of traditional Uma Lengge houses in Maria Village, teak (Tectona grandis Lf.), areca nut (Areca catechu L.), coconut (Cocos nucifera L.), banyan (Ficus benjamina L.), bamboo (Gigantochloa atter Kurz.), hibiscus (Hibiscus tiliaceus L.), and ndolo (Imperata confera (J.Presl) Ohwi). The local wisdom contained in Uma Lengge architecture is still being applied by the people of Maria Village for generations which include customs, and the preservation of annual traditions or rituals that have good values to be passed down

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KEKUATAN BAMBU BETUNG (Dendrocalamus asper Backer ex K.Heyne) MENAHAN GAYA NORMAL TEKANAN DAN TARIKAN

Cited by 6 publications

References 10 publications

Comparing the Building Code Sawn Lumber’s Wet Service Factors (CM) with Four Commercial Wood Species Laboratory Tests

Comparing the Building Code Sawn Lumber’s Wet Service Factors (CM) with Four Commercial Wood Species Laboratory Tests

Evaluasi Kekuatan Oriented Strand Board (Osb) Bambu Andong Pada Berbagai Rasio Lapisan Face-Core Berdasarkan Pengujian Non-Destruktif Dan Destruktif

Bima Traditional House Ethnobotany: Uma Lengge

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