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      Analisis Kekuatan Tekuk Kolom Bambu Tali (Gigantochloa apus (J.A. & J.H. Schultez) Kurz) dengan Variasi Panjang dan Jumlah Batang Penyusun Kolom

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      Date
      2022-01-10
      Author
      Absari, Gustini Woro
      Bahtiar, Effendi Tri
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      Abstract
      Bambu tali berpotensi dijadikan sebagai kolom. Tekuk merupakan titik kritis penyebab kegagalan struktur kolom dalam menahan beban tekan. Penelitian ini bertujuan mengetahui kekuatan tekuk maksimum kolom bambu tali dengan variasi panjang dan jumlah batang penyusun. Bambu tali diperoleh dari pasar komersial di Jl. Raya Dramaga, Bogor, Jawa Barat. Bambu dipotong menjadi ukuran 1, 2, dan 3 m. Pengukuran dimensi berdasarkan BS ISO 19624:2018, sedangkan pengukuran geometri berdasarkan BS ISO 22157:2019. Pengujian sifat fisis meliputi kadar air, kerapatan, dan kerapatan linear, serta pengujian mekanis yaitu kekuatan tekuk kolom bambu tali. Uji lanjut Duncan digunakan untuk membandingkan hasil pengujian tekuk kolom bambu tali dengan variasi panjang dan jumlah batang penyusun kolom. Contoh kolom berukuran 1 m, 2 m, dan 3 m. Pengujian tekuk kolom 1 m mengunakan UTM SATEC-Baldwin berkapasitas 30 ton, sedangkan pengujian tekuk kolom 2 m dan 3m menggunakan alat uji tekan berkapasitas 100 ton. Pengujian tekuk kolom dilakukan dengan memberikan pembebanan secara vertikal pada kolom. Pengolahan data faktor tekuk menggunakan Formula Ylinen’s. Kolom bambu panjang memiliki angka kelangsingan tinggi dan menghasilkan nilai tekuk rendah, sehungga kolom mudah mengalami tekuk. Kolom bambu tali komposisi ganda dua, tiga, maupun empat memiliki nilai kekuatan tekuk lebih tinggi dibandingkan jumlah kekuatan tekuk masing-masing batang penyusunnya karena adanya kerjasama antar komponen penyusun. Peningkatan kekuatan akibat kerjasama antar komponen penyusun ini dapat dinyatakan sebagai repetitive member factor (komponen struktur berulang) yang masih perlu diperhitungkan.
       
      Bamboo tali has the potential to be used as a column. Buckling is a critical point that causes the failure of the column structure to withstand compressive loads. This study aims to determine the maximum buckling strength of the bamboo tali column with variations in length and number of comonents. The bamboo tali was obtained from commercial market on Jl. Raya Dramaga, Bogor, West Java. The bamboo is cut into 1, 2, and 3 meters. Dimensional measurements are based on BS ISO 19624:2018, while geometric measurements are based on BS ISO 22157:2019. Physical properties tests include moisture content, density, and linear density, as well as mechanical testing, namely the buckling strength of the bamboo tali column. Duncan's further test was used to compare the results of the buckling test of bamboo tali columns with variations in length and number of components making up the column. The column test speciments are 1 m, 2 m, and 3 m. The 1 m sized columns are tested using UTM SATEC-Baldwin 30 tons capacity, while the 2 m and 3 m sized column were tested using compressive testing machine 100 tons capacity. The column buckling test is carried out by applying vertical loading to the column. Buckling factor data processing using Ylinen's Formula. Long bamboo columns have a high slenderness rate and produce a low buckling value, so that the column is prone to buckling. The the buckling strength of bamboo multicolumns are higher than the sum of single colunms buckling strengths because of the cooperation between the column’s components. The strength improvement because of the column’s components cooperation can be determined as repetitive member factor which should be considered.
       
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      http://repository.ipb.ac.id/handle/123456789/110538
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