ANALISIS KEKUATAN ATAP KUBAH DENGAN STRUKTUR RANGKA KAYU KELAPA
Abstract
The dome roof truss structure with coconut wood is an innovation initiated by CV. Bali Mandala on one of their projects located in Hawaii. Where the main material uses coconut wood which has been treated first to increase termite and fire resistance. This dome roof has a unique floral patterned truss structure, because of this unusual shape of the structure, so to ensure that the structure is safe and can be marketed widely, it is necessary to complete a feasibility test. The limited facilities for direct wind load testing are the reasons why analysis with three-dimensional (3D) computer modeling is needed. To be able to obtain the appropriate structural behavior between reality and the 3D model, validation was carried out by trial and error on the elasticity of the wood to obtain the appropriate deformation between the structure in the field and the 3D model. The validated 3D model is provided with roof loads, wind and snow loads following ASCE 7-22 provisions for the Hawaii area. From the combination of service load (D+Lr) the maximum deformation is 20.7 mm while the maximum allowable deflection is 30 mm. The tensile, compressive, shear, and flexural capacity of wooden elements, is checked based on the Allowable Stress Design Method (ASD) SNI 7973: 2013, where the compressive, tensile, shear, and flexural stresses due to the load are smaller than the allowable stress. So, from the results of stress control and deflection which are still below the limit value, it can be said that the dome roof with the coconut wood frame structure is safe and can be applied.
References
ASCE 7. (2022). Minimum Design Loads and Associated Criteria for Buildings and Other Structures. American Society of Civil Engineers.
ASTM E69. (2002). Standard Method for Combustible Properties of Treated Wood by the Fire Tube Apparatus. ASTM International.
Bachtiar, G. (2007). Pengawetan Beberapa Jenis Kayu dengan Proses Rendaman Dingin. Jurnal Menara Jurusan Teknik Sipil FT. UNJ, II.
BSN. (2012). SNI 7973-2013 tentang spesifikasi desain untuk konstruksi kayu. Badan Standardisasi Nasional.
BSN. (2020). SNI 1727-2020 tentang beban desain minimum dan kriteria terkait untuk bangunan gedung dan struktur lain. Badan Standardisasi Nasional.
Can, A., Grzeskowiak, W., & Ozlusoylu, I. (2018). Improving the Fire Resistance of Heat Treated Wood by Using Environment Friendly Substance. Journal of Bartin Faculty of Forestry, 20, 519-524.
Darmono, Atun, S., & Prasetyo, S. (2013). Pemanfaatan Campuran Boraks dan Asam Borat sebagai Bahan Pengawet Kayu terhadap Serangan Rayap. Jurnal Inotek, 17, 82-99.
Dayadi, I. (2021). Ketahanan Api Kayu Sengon (Paraserianthes falcataria (L.) Nielsen) yang Diawetkan dengan Bahan Pengawet Boraks. Perennial, 17, 19-25. https://doi.org/10.24259/perennial.v17i1.13650
Dumanauw, J. F. (1993). Mengenal Kayu. Kanisius.
Effendi, A. (2007). Natrium Silikat Sebagai Bahan Penghambat Api Aman Lingkungan. Jurnal Teknologi Lingkungan, 8(3), 245-252.
Faghih, A. K., & Bahadori, M. N. (2011). Thermal performance evaluation of domed roofs. Energy and Buildings, 43(6), 1254-1263. https://doi.org/10.1016/j.enbuild.2011.01.002
Indrosaptono, D., Sukawi, & Indraswara, M. S. (2014). Kayu Kelapa sebagai Alternatif Bahan Konstruksi Bangunan. Jurnal Modul, 14, 53-58.
Kim YC, Yoon SW, Cheon DJ, & Song JY. (2019). Characteristics of wind pressures on retractable dome roofs and external peak pressure coefficients for cladding design. Journal of Wind Engineering and Industrial Aerodynamics, 188, 294-307. https://doi.org/10.1016/j.jweia.2019.02.016
Noguchi M, & Uematsu Y. (2003). Design wind pressure coefficients for spherical domes. Journal Wind Eng, 177-178.
Ostman, B., Voss, A., Hughes, A., Hovde, P. J., & Grexa, O. (2001). Durability of Fire Retardant Treated Wood Products at Humid and Exterior Conditions. Review of Literature, 95-104.
PKKI. (1961). Peraturan Konstruksi Kayu Indonesia. Departemen Pekerjaan Umum.
Rangkang, J., Sondakh, F., & Saerang, E. J. (2016). Karakteristik Kayu Kelapa di Berbagai Zona di Indonesia Timur Berdasarkan Sifat Fisis dan Mekanisnya. Jurnal Teoritis Dan Terapan Bidang Rekayasa Sipil, 23.
Runsheng, T., Meir, I. A., & Etzion, Y. (2003). An analysis of absorbed radiation by domed and vaulted roofs as compared with flat roofs. Energy and Buildings, 35, 539-548.
Susilaning, L. S., & Suheryanto, D. (2011). Optimasi Moisture Content Proses Dry Kiln Menggunakan Design Of Experiment (DOE) Taguchi. Prosiding Seminar Nasional Teknik Kimia.
Uematsu Y, Yamada M, Inoue A, & Hongo T. (1997). Wind loads and wind-induced dynamic behavior of a single-layer latticed dome. Journal of Wind Engineering and Industrial Aerodynamics, 66(3), 227-248.
Yamauchi, S., Sakai, Y., Watanabe, Y., & Kubo, M. (2007). Distribution Boron in Wood Treated with Aqueous and methanolic boric acid solutions. J. Wood Sci, 53, 324-331.
Yudodibroto, H. (1983). Pengeringan Kayu. Universitas Gajah Mada.
Authors who publish with this journal agree to the following terms:
1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
Abstract viewed = 289 times
PDF downloaded = 641 times
