SIMULASI NUMERIK FINITE ELEMENT METHOD (FEM) UNTUK OPTIMALISASI PENAMPANG U-DITCH 2 m TERHADAP PELAKSANAAN HANDLING

Abstract

Increasing precast concrete usage in many sectors automatically spur fabricators to improve the quality of their products. Related to that, the application of u-ditch type 2 m domestic product, during product handling (when concrete was 7 hours old), many cracks occur at the section. Therefore, this optimization aims to improve product quality. Besides, this optimization also supports to increase production capacity due to the reinforcement volume. The results obtained from FEM simulation, the stress distribution is more favorable in the modified crosssection. Stress distribution of the section inner corner (cracks zone of the existing section), turn from tension become compression and then turn again to tension. Meanwhile, the modified section gives different stress distribution, stress transition from compression turns back again to tension not happen here. While the evaluation due to the strain value, the modified cross-section gives a smaller strain value than the existing cross-section strain. Reinforcement deformation that offers a direct effect to the concrete deformation decreases due to modified reinforcement configuration. Besides, this optimization results in a reduction of reinforcement volume by 10.54%.

Kajian Geoteknik untuk Penentuan Geometri Lereng Front Penambangan di PT. XYZ

“…Input yang dilakukan dalam lereng tunggal berdasarkan hasil properties material (uji laboratorium sifat fisik dan mekanik batuan). Nilai kondisi material digunakan untuk mengetahui faktor keamanan pada lereng tunggal guna memodelkan lereng dengan geometri yang berbeda sebagai acuan geometri yang paling optimal [9]…”