PEMODELAN SAMBUNGAN LAS PADA STRUKTUR BALOK KOLOM BAJA BERBASIS PROGRAM ELEMEN HINGGA
Abstrak
Pada konstruksi baja pemilihan jenis dan detail pemasangan sambungan adalah faktor penting yang tidak dapat diabaikan. Terdapat tiga jenis sambungan baja, yaitu: baut, las, dan paku keling. Sambungan las akan menghasilkan kekuatan yang baik apabila dilakukan suatu kontrol kualitas yang tepat. Selain itu, sambungan las merupakan sambungan yang murah dan mudah diaplikasikan. Fokus dari penelitian ini adalah melakukan pemodelan sambungan las pada struktur balok kolom menggunakan program bantu elemen hingga yang mana hasilnya akan mendekati hasil dari suatu eksperimen yang sudah pernah dilakukan. Terdapat dua pemodelan yang dilakukan; Model-1 menggunakan interaksi jenis tie constraint interaction, sementara Model-2 menggunakan tipe merge and chamfer. Hasil penelitian menunjukan bahwa Model-2 lebih mendekati hasil eksperimen dengan tingkat akurasi beban ultimate sebesar 97.75%. Bentuk deformasi yang terjadi pada model ini juga mendekati hasil eksperimen. Dalam hal energi disipasi, hasil eksperimen adalah sebesar 78,036.396 kN.mm sementara hasil untuk Model-2 adalah 94,456.982 kN.mm. Tingkat keakuratan hasil energi disipasi Model-2 mencapai 82.62%.
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