Construction Monitoring And Control Of A Special-Shaped Cable-Stayed Pedestrian Bridge

A monitoring system for a cable-stayed bridge consists four sub-systems, measuring sub-system, calculating sub-system for construction, the analysis sub-system of error elements, and calibrating and predicting sub-system. The calculating for construction is the premise of construction monitoring system. Accurate calculation for construction process is the basis of the other sub-systems. The construction monitoring and control of TEDA street special-shaped cable-stayed pedestrian bridge in the Economic Developing Area of Tianjin are systematically performed.In this thesis, besides general analysis on a special-shaped cable-stayed pedestrian bridge, special attention is paid to the analysis on thin-wall coffer. To measure a parameter, there are several measuring techniques for choosing. The option of the measuring techniques for the special-shaped cable-stayed bridge monitoring is discussed, with special reference to practical usage. The calculation of the forces of the cable under dead load is the basis of analysis on a cable-stayed bridge. Based on the review of the calculation theory of the cable forces under dead load, the principle, method and usage of theory are discussed. As a case history, the behavior under load of a pedestrian bridge across TEDA Street in the Economic Developing Area of Tianjin is analyzed and cable forces are calculated. According to the prescript of the"Design Specifications of Highway Cable-stayed Bridge (on Trial)", a finite element model is proposed to analyze structure and calculate cable forces of the monitored bridge. With the monitoring of the cable forces, and the elevations of tower and beam, the construction process is successfully accomplished under author's instrumentation.The research has ensured the successful construction of the special-shaped cable-stayed pedestrian bridge across TEDA Street in the Economic Developing Area of Tianjin.