Analisis pengaruh jumlah strand terhadap persentase jacking force

Prestressed bridges are widely used in highway construction. In designing prestressing, there are many considerations to achieve effective results. One parameter is interrelated with another. For example, the number of strands is related to the percentage of jacking force. In detail, this study examines how the number of strands affects the percentage due to jacking force in post-tensioned PCI beams for the Yogyakarta-Bawen Toll Road Project (Package 1 Part 1). A quantitative analytical approach is applied using project documents and relevant loading and design provisions. Variations in the number of strands from 46 to 62 are evaluated by comparing the percentage of jacking force. The results show that increasing the number of strands reduces the percentage of jacking force, from 79.38 percent at 46 strands to 58.89 percent at 62 strands. Although the number of strands affects the distribution of jacking force, the difference in the percentage of jacking-related prestress across the various variations is relatively small. Therefore, the effect of strand variation on the percentage of prestress due to jacking force is not significant, but this is a first step to find prestress loss. so that other loss components may be more dominant in the total prestress loss.