2Alkhairi F M, Naaman A E. Analysis of beam prestressed with unbolted internal or external tendons [J]. Journal of Structural Engineering, 1993, 119(9): 2680-- 2700.
3Pisanil M A. Numerical model for external prestressed beams [J]. Structural Engineering and Mechanics, 1996, 4(2): 177-- 190.
4Aparicio A C, Ramos G~ Flexural strength of externally prestressed concrete bridges [J]. Structural Journal, 1996, 93(5): 512--523.
5Saiidi M, Douglas B, Feng S. Prestressed force effect on vibration frequency of concrete bridges [J]. Journal of Structure Engineering, 1994, 120(7): 2233--2241.
6Ayaho Miyamoto. Behavior of prestressed beam strengthened with external tendons [J]. Journal of Structure Engineering, 2000, 1030-- 1037.
7范立础.桥梁工程[M].北京:人民交通出版社,1988..
8李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,2003.
9T. YLin. , Ned H. Bums, design of prestressed concrete structures[M]. Third Ddition. NewYork: John Wiley&Sons, 1981.