Reliability analysis of prestressed concrete beams with unbonded tendons in accordance with NBR 6118-2014: parametric study for load ratios and compressive strength of concrete. RSD [Internet]. 2020 Oct. 16 [cited 2025 Dec. 6];9(10):e7239109172. Available from: https://www.rsdjournal.org/rsd/article/view/9172