required post-tensioning force

PCI Bridge Desing Manual 3rd Edition

 

8.9 TRANSVERSE DESIGN OF ADJACENT BOX BEAM BRIDGES

8.9 인접한 박스 빔 교량의 횡방향 설계

 

The following design equation was developed for calculating the required post-tensioning force (P) for
intermediate diaphragms per unit length of the bridge (Hanna, et al., 2007) from the data from the grid analyzes:

 

 

SI  Unit

Where,
D = box depth, m
W = bridge width, m
L = bridge span, m
𝜃 = skew angle, degrees
K_L = correction factor for span-to-depth ratio more than 30
𝐾_𝐿 = 1.0 + 0.003 (L/D - 30)
K_S = correction factor for skew angle more than 0°
𝐾𝑆 = 1.0 + 0.002𝜃