pdf,
1,5 MB
ETA_12-0150_BBV_System_EW_L7_to_L31_2018-06-20.pdf
meter. 1.3.3. Prestressing force Prestressing and over-tensioning forces are specified in the respective national provisions. The maximum force P0 applied to a tendon shall not exceed the force P0,max = 0.9 Ap fp0,1k laid down in Table 2 (150mm²). The value of the initial prestressing force Pm0 applied [...] not exceed the force Pm0,max = 0.85 Ap fp0,1k laid down in Table 2 (150 mm²). Table 2 Maximum prestressing forces for tendons with Ap = 150 mm² Tendon designation Number of strands Cross section Ap Prestressing force Y 1860 S7 fp0,1k = 1640 N/mm² Pm0,max P0,max [mm²] [kN] [kN] BBV L7 EW 7 1050 1464 1550 [...] wedges have to be pressed in to prevent slipping out. The admissible prestressing force is reduced per left out strand as shown in Table 3. ETA 12/0150 – version 2 - of 20/06/2018 – Page 8 of 36 Table 3 Reduction of the prestressing force when leaving out a strand Ap Y 1860 S7 ∆Pm0 ∆P0 [kN] [kN] 150 mm²[...]