Design and Fabrication of the Tower Column of Nanjing No.3 Yangtze River Bridge
CUI Bing, MENG Fan-chao, FENG Liang-ping, DONG Meng(China Highway Planning and Design Institute, Beijing 100010, China)
Nanjing No.3 Yangtze River Bridge is the first cable-stayed bridge adopting steel tower column in China. Its steel concrete joint is located on the top of the lower crossbeam under the cable tower. In order to avoid whirlpool-excited vibration and galloping, the pattern selection of tower column is carried out through air hole experiment under different situations of attack angle by 10 kinds of incisal angle solutions and 3 kinds of incisal angle type sections. A set of equipment is installed at the end of the tower to control the vibration caused in the process of cable tower erecting. Segments are connected by high strength bolts. Finite element analysis on the structure is carried through by ANSYS program. Check computation is done on the most unfavorable construction condition. Plates and anchor cells are manufactured in the factory. The segments of the steel tower column are group welded on the construction site and are installed on the bridge site. Welding process and welding sequence are determined by welding evaluation test. Large end face with digital display is employed to process floor type boring milling machine and accurate measuring equipment so as to insure machining accuracy.
【CateGory Index】： U442.5