material quantities are usually not the most important items of such complex construction projects. A design with minimum materials does not necessarily represent the most efficient design. How a structure can be built is extremely important. The main purpose of this paper is to describe how the bridge configuration and cable arrangement were modified to facilitate simpler construction and how the constuction equipment was designed to make the operation more efficient. The dame point bridge in jacksonville, florida is a cable-stayed bridge with a mainspan of 1300 feet. It is presently the longest spancable-stayed bridge in the united states. It has a harp cable arrangement. The girder is 105 feet wide consisting of two solid edge girders. The bridge deck is supported by transverse floor beams framed into these edge girders. The deck slab varies from 9 in. To 2 ft. The floor beams are spaced at 17 ft 6 in. On centers. The cables have dywidag bar tendons grouted inside a steel pipe. This is the only cable-stayed bridge in north america that uses bar cables. Towers are solid sections with cables enclosed in a crisscross pattern. The tower legs and columns are interconnected to each other by three bow-tie shaped cross-struts. Contruction of the deck was by cast-in-place method which used specially designed form travelers. Construction progressed smoothly. Aerodynamic stability during construction was studied based on results from wind tunnel tests. Special tie-downs weredesigned and installed to safeguard against possible buffeting of the bridge under hurricane. This paper appears in transportation research record no. 1290, Third bridge engineering CONFERENCE, MARCH 10-13, 1991, DENVER, COLORADO, VOLUME 2.
Samenvatting