Electronic Theses and Dissertation

Penelitian ini bertujuan untuk mengkaji efektivitas penambahan wing plate dengan
panjang 150 mm serta variasi lebar (25 mm dan 50 mm) terhadap peningkatan kuat
lentur sambungan flush end-plate. Pemodelan numerik dilakukan menggunakan
perangkat lunak Abaqus dengan membandingkan tiga model sambungan: Model 1
(tanpa wing plate), Model 2 (wing plate lebar 25 mm, panjang 150 mm), dan Model
3 (wing plate lebar 50 mm, panjang 150 mm). Beban terpusat diberikan pada jarak
400 mm dari bidang sambungan dan ditingkatkan secara bertahap hingga mencapai
kegagalan. Pengukuran perpindahan dilakukan pada tiga titik utama, yaitu sayap
bawah balok (TP1), pelat badan (TP2), dan pelat ujung (TP3). Hasil analisis
menunjukkan bahwa penambahan wing plate meningkatkan kapasitas kuat lentur
secara bertahap. Model 1 mencapai 72,85 kN.m, Model 2 meningkat 6,7% menjadi
77,76 kN.m, dan Model 3 meningkat 10,4% menjadi 80,45 kN.m. Perpindahan
ultimit pada sayap bawah (TP1) berturut-turut sebesar 42,41 mm, 35,34 mm, dan
25,62 mm, sedangkan perpindahan pada pelat ujung (TP3) menurun dari 26,26 mm
menjadi 20,48 mm (turun 22,0%) dan 12,92 mm (turun 50,8%). Sebaliknya,
perpindahan pada pelat badan (TP2) meningkat dari 3,26 mm menjadi 5,74 mm
(naik 76,1%) dan 6,03 mm (naik 84,4%). Hal ini mengindikasikan bahwa wing
plate efektif mengurangi perpindahan lentur dari pelat ujung ke badan balok.
Perbandingan dengan nilai teoritis (SNI 03-1729-2020) menunjukkan bahwa
perhitungan teoritis memberikan hasil yang sangat konservatif (32,18 kN.m)
dibandingkan hasil numerik. Mode kegagalan bergeser dari dominasi lentur pelat
ujung pada Model 1 menuju keterlibatan tekuk badan pada Model 2 dan Model 3.

This study aims to investigate the effectiveness of adding a wing plate with a length of 150 mm and width variations (25 mm and 50 mm) on the flexural strength improvement of flush end-plate connections. Numerical modeling was conducted using Abaqus software by comparing three connection models: Model 1 (without wing plate), Model 2 (wing plate width 25 mm, length 150 mm), and Model 3 (wing plate width 50 mm, length 150 mm). A concentrated load was applied at a distance of 400 mm from the connection face and was gradually increased until failure occurred. Displacement measurements were taken at three key points: the bottom beam flange (TP1), the web plate (TP2), and the end plate (TP3). The analysis results indicate that the addition of the wing plate progressively increases the flexural capacity. Model 1 achieved 72.85 kN.m, Model 2 increased by 6.7% to 77.76 kN.m, and Model 3 increased by 10.4% to 80.45 kN.m. The ultimate displacements at the bottom flange (TP1) were 42.41 mm, 35.34 mm, and 25.62 mm, respectively, while the displacements at the end plate (TP3) decreased from 26.26 mm to 20.48 mm (a 22.0% reduction) and 12.92 mm (a 50.8% reduction). Conversely, the displacements at the web plate (TP2) increased from 3.26 mm to 5.74 mm (a 76.1% increase) and 6.03 mm (an 84.4% increase). This indicates that the wing plate effectively reduces flexural displacement from the end plate to the beam web. A comparison with theoretical values (SNI 03-1729-2020) shows that the theoretical calculation yields highly conservative results (32.18 kN.m) compared to the numerical results. The failure mode shifted from the dominance of end plate bending in Model 1 toward the involvement of web buckling in Models 2 and 3.