4Jean Muller. Some Recent International Projects with External Prestressing[ J ]. AFPC External Prestressing in Structures,France. 1993:71 - 83.
5Godart B. Strengthening prestressed concrete box girder bridges: the French experience [J]. Structural Engineering International. 1995(2) :81 -84.
6Virlogeux M P. External Prestressing - From Construction History to Modern Technique and Technology, External Prestressing in Bridges[SO]. ACI sp - 120,1990.
7Muller J. Construction of Long Key bridge[J]. PCI Journal,1980(6) :97 - 111.
8Azez Hindi, Robert Macgregor, etc. Enhancing the Strength and Ductility of Post - Tensioned Segmental Box Girder Bridge [J]. AFPC External Prestressing in Structures, France. 1993:153 - 162.
9American Concrete Institute. External prestressing in bridges [M]. ACI Special Publication SP2120. Detroit, MI, 1990..
10Straninger W, Wicke M. Bridge strengthening with additional prestressing [J]. Structural Engineering International. 1995(2) :78 -80.
