Tahanan Lateral pada Sistem Komposit LVL Kayu Sengon dan WPC

Abstract

Abstrak Pemanfaatan produk turunan kayu Laminated Veneer Lumber (LVL) Kayu Sengon dan Wood plastic composites (WPC) Jati sebagai bahan konstruksi perlu dikaji lebh lanjut. Penelitian membahas tentang kinerja sambungan kedua bahan tersebut untuk mendapatkan kapasitas sambungan, nilai tahanan lateral serta pola kegagalan pada sistem komposit LVL Kayu Sengon dan WPC akibat dari penggunaan sambungan baut dengan variasi diameter yang berbeda. Benda uji merupakan balok LVL kayu sengon dan WPC yang disambung dengan baut dalam sistem satu bidang geser. Variasi diameter baut yaitu 6 mm, 8 mm, 10 mm dan 12 mm. Pengujian mengacu pada ASTM D 5652-95. Pengujian dilakukan secara analitis sebagai prediksi kekuatan sambungan dan pola kegagalan dan secara eksperimental di laboratorium. Kegagalan sambungan dilihat dari kegagalan yang terjadi pada kuat tumpu kayu dan kegagalan baut. Hasil penelitian menunjukkan nilai kapasitas sambungan baut 6 mm, 8 mm, 10 mm dan 12 mm berturut-turut sebesar 5453,887 N; 5420,986 N; 9200,262 N; 10207,340 N. Sambungan baut 6 mm membentuk pola kegagalan berupa terbentuknya dua sendi plastis pada alat penyambung dalam satu bidang geser sedangkan sambungan baut 8mm, 10mm dan 12 mm terjadi pola kegagalan tumpu kayu samping disertai dengan satu sendi plastis pada alat sambung dalam satu bidang geser. Kata kunci: LVL kayu sengon, tahanan lateral, WPC, wood plastic composites. Abstrak The use of wood engineering products Laminated Veneer Lumber (LVL) of Sengon Wood and Teak Wood plastic composites (WPC) as construction materials needs further study. Research discusses about the joint performance of the two materials to obtain the connection capacity, lateral resistance value and failure patterns in the LVL Wood Sengon and WPC composite system due to the use of bolted connections with different diameter variations. The test objects are LVL beams of sengon wood and WPC which are connected by bolts in a single plane shear system. Variations in bolt diameter are 6 mm, 8 mm, 10 mm and 12 mm. Testing refers to ASTM D 5652-95. Tests were carried out analytically as a predictor of joint strength and failure patterns and experimentally in the laboratory. Connection failure is seen from the failure that occurs in the wooden support and bolt failure. The results showed that the bolt connection capacity values ​​of 6 mm, 8 mm, 10 mm and 12 mm were 5453.887 N, respectively; 5420,986 N; 9200,262 N; 10207.340 N. The 6 mm bolt connection forms a failure pattern in the form of the formation of two plastic hinges on the connecting device in one shear plane while the 8mm, 10mm and 12 mm bolt connections occur a side wood support failure pattern accompanied by one plastic hinge on the connection tool in one shear plane. Keywords: LVL sengon wood, lateral resistance, WPC, wood plastic composite.