Title:
The Evolution of Concrete Cable-Stayed Bridges
Author(s):
Walter Podolny Jr.
Publication:
Concrete International
Volume:
3
Issue:
8
Appears on pages(s):
34-42
Keywords:
bridges (structures); bridge piers; con-cretes;
concrete construction; precast concrete;
prestressed concrete; suspension bridges.
DOI:
Date:
8/1/1981
Abstract:
Morandi’s Lake Maracaibo Bridge constructed in 1962 is generally considered to be the first modern concrete cable-stayed bridge; however, it was preceded by two other little known concrete cabie-stayed structures. The evolution of concrete cabie-stayed bridges is traced from Torroja’s Tempui Aqueduct in Spain, completed in 1925, to present day design concepts. To the author’s knowledge, 21 cable-stayed bridges have been constructed and others are in the design stage. As late as 1970, the practical span limit for steel cable-stayed structures was considered to be 1000 ft (300 m). Currently, the Dame Point Bridge, concrete alternate, contemplates a 1300 ft (396 m) main span. Concrete cable-stayed bridges with spans of 1600 ft (500 m) are considered technically feasible. The concept of a concrete cabie-stayed bridge has extended the practical and competitive economic span range to the extent that concrete is a viable material alternative in the long-span bridge range. This article discusses the history, advantages, structural arrangement, and stay cable spacing of concrete cable-stay bridges. [Author]