Sutong Cable-stayed Bridge Research Articles

Study on Wind-Induced Vibration Control of a Long-Span Cable-Stayed Bridge Using TMD-Type Counterweight

AbstractIt has been widely acknowledged that a tuned mass damper (TMD) can effectively control the wind-induced vibration of the main deck of long-span bridges. However, the unfavorable effect on static characteristics of the increased dead load cannot be avoided if the TMD is installed straight on the main deck. A TMD-type counterweight is designed in this paper, where the counterweight originally designed for reducing the live load–induced displacements at the central span are taken as the mass block in the TMD. The Sutong Cable-Stayed Bridge (SCB), with a main span of 1,088 m, is taken as an example. The buffeting responses of the bridge with the stationary counterweight and the proposed TMD-type counterweight are compared, and the control performance of the bridge with and without auxiliary piers is also investigated. Results indicate that the TMD has notable effects on reducing the vibration of the main deck without auxiliary piers, whereas the impact is not significant for the presence of the auxili...

Research on the Structural System of Kilometer-Scale Cable-Stayed Bridges

At the beginning of the 21st century, Su-tong and Stonecutters cable-stayed bridges were born into the world, which make the original span record of 890m up to 1088m. The increasing range of the span is so large that it is necessary to carry out a special research on structural system of the cable-stayed bridge with kilometer-scale span. Therefore, two cable-stayed bridges have been designed as the research objects, which come from the background of Su-tong cable-stayed bridge. And the main span is respectively 1308m and 1500m. In this paper, an analysis is carried out from the aspect of girder-tower relationship which comes from the concept of the structural system. In the static analysis, structural system, which is respectively floating, half floating and rigid, has been studied. And in the dynamic analysis, the girder-tower relationship has also been studied, which is respectively with no dampers, elastic links and viscous dampers. Based on the analysis results, structural system applicable for kilometer-scale cable-stayed bridges is summarized.

Global Analysis of the SuTong Cable-stayed Bridge

The SuTong cable-stayed bridge is the Primary Fairway Bridge of the Suzhou-Nantong Yangtze River Bridge Project.lt will be the most important project with significant target to minish the economy gap and promote balanced development between Suzhou and Nan- tong city in China.The total length of the cable-stayed portion of this project is 2 088 m with main span of 1 088 m.The height of the py- lons is about 300 m.When completed it will be the longest cable-stayed bridge in the world.This paper gives a brief description of the bridge and some considerations on structural design and static analysis. The total length of the bridge portion in this link is about 8.2 km.At the bridge site there are two navigation channels, the Primary Fairway and the Special Fairway for the exclusive use by port Nantong.The proposed bridge project consists accordingly of the Primary Fairway Bridge, the Special Fairway Bridge and the approach spans.The Pri- mary Fairway Bridge (hereinafter named the bridge in brief) is a cable-stayed bridge. The Special Fairway Bridge is a pre -stressed concrete continuous rigid frame bridge with a span arrangement of (140 + 268 + 140) m.And the approach spans are some pre - stressed concrete continuous girder