Struktur Kayu, Sambungan Baut
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Transcript of Struktur Kayu, Sambungan Baut
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STRUKTUR KAYU
“ANALISIS SAMBUNGAN BAUT”
Oleh:
Kurnia Hadi Putra, S.Pd., M.T.
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Pendahuluan
Alat sambung baut umumnya difungsikanuntuk mendukung beban tegak lurus sumbu
panjangnya. Kekuatan sambungan bautditentukan oleh kuat tumpu kayu, teganganlentur baut, dan angka kelangsingan (nilaibanding antara panjang baut pada kayu utama
dengan diameter baut). Ketika angkakelangsingan kecil, baut menjadi sangat kakudan distribusi tegangan tumpu kayu di bawahbaut akan terjadi secara merata.
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Distribusi Tegangan Tumpu Kayu pada
Sambungan Baut
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Tahanan lateral acuan
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Tahanan lateral acuan
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Tahanan lateral acuan
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Keterangan
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Kuat Tumpu Kayu
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Kuat Lentur Kayu
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Tabel Kuat tumpu kayu (Fe) dalam
N/mm2 untuk baut ½“
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Tabel Kuat tumpu kayu (Fe) dalam
N/mm2 untuk baut 5/8“
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Tabel Kuat tumpu kayu (Fe) dalam
N/mm2 untuk baut ¾“
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Geometrik Sambungan Baut
Jarak antar alat sambung baut harus direncanakan
agar masingmasing alat sambung dapat mencapai
tahanan lateral ultimitnya sebelum kayu pecah. Jarak
antar alat sambung pada Gambar dapat dilihat pada
Tabel. Apabila jarak antar alat sambung kurang dari
yang disyaratkan pada Tabel, maka tahanan lateral
alat sambung harus direduksi.
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Gambar.
Geometrik
sambungan
baut: (A)
sambungan
horisontal, dan(B) sambungan
vertikal
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Tabel Jarak tepi, jarak ujung, dan persyaratan spasi
untuk sambungan baut
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Tabel Jarak tepi, jarak ujung, dan persyaratan spasi
untuk sambungan baut
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Faktor koreksi sambungan baut
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Tabel Nilai
Cg (NDS dari
U.S, 2001)
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Contoh menghitung Faktor aksi kelompok Cg
menurut SNI – 5 (2002)
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Data sambungan:
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Faktor koreksi sambungan baut
Tabel yang dimaksud yaitu Tabel Jarak tepi, jarak ujung, dan
persyaratan spasi untuk sambungan baut
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Tabel yang dimaksud yaitu Tabel Jarak tepi, jarak ujung, dan
persyaratan spasi untuk sambungan baut
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Contoh Soal 1
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Penyelesaian
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Contoh Soal 2
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Contoh Soal 3
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