BUILT-UP MEMBERSAdrian Satriaji WM. Akbar Faereza Bagus Dwi WicaksanaNovita IndraswariSheila Aryntha

Compression MemberBuilt-Up MembersBUILT-UP MEMBERSPenampang Tersusun / Majemuk : penampang yang terdiri dari dua atau lebih profil baja yang dihubungkan satu dengan lainnya dengan pelat penghubung (pelat koppel). Kekuatan dari built-up members merupakan fungsi dari rasio kelangsingan KL/r

Compression MemberHubungan antara elemen batang dengan penghubung harus kakuAda dua macam sumbuSumbu bahan : memotong semua elemen batang; sumbu yang melalui bahan(profil) atau paling banyak melalui bahan (profil). Sumbu bebas bahan : tidak memotong atau memotong sebagian elemen batang; sumbu yang sama sekali tidak atau paling sedikit melalui bahan (profil)

BUILT-UP MEMBERS

Compression MemberCONNECTION REQUIREMENTS FOR BUILT-UP MEMBERS COMPOSED OF ROLLED SHAPES

CONNECTION REQUIREMENTS FOR BUILT-UP MEMBERS COMPOSED OF ROLLED SHAPESYang paling umum adalah double siku.Diperlukan pemasangan filler (spacer) antar siku yang ketebalannya sama dengan gusset plate.Jika terjadi buckling pada x-axis maka konektor (baut) tidak diperhitungkan dalam perhitungan beban.

Compression MemberBuilt up member acts as a unit, AISC E6.2Dimana : a = spasi antar bautri = jari-jari girasi terkecilKa/ri = effective slenderness ratio of the componentKL/r = maximum slenderness ratio of built-up member.

Compression MemberJika terjadi buckling pada y-axis baut diperhitungkan menjadi shearing force.

AISC E6 membagi connector menjadi 2 kategori:1. Snug-tight bolts2. welds or fully-tensioned bolts

Compression Member

Untuk welds or fully tightened bolts

(KL/r)m = modified slenderness ratio(KL/r)0 = original unmodified slenderness ratiorib = radius gyration of component about axis parallel to member axis of buckling= seperation ratio = h/2ribh= distance between component centroidsUntuk snug-tight bolts

Compression MemberConnection Requirements for Built-Up Members of Plates or Both Plates and Shapes

Compression MemberWhen a built-up member consists of two or more rolled shapes separated by a substantial distance, plates must be used to connect the shapes. AISC E6 contains many details regarding the connection requirements and the proportioning of the plates.

Compression Member

Compression Member

Compression Member

Compression Member

Compression Member

Compression Member

Compression Member