Research On The Mechanical Behavior Of Part Prestressed Concrete Cable-stayed Bridge With Corrugated Steel Webs

The part prestressed concrete cable-stayed bridge with corrugated steel webs have the advantages of girder bridge stiffness and light weight of cable-stayed bridge,it's main beam is much lighter and higher material utilization efficiency than the part prestressed concrete cable-stayed bridge, is a new type of bridge with excellent comprehensive performance. However, the design standards and methods of corrugated steel webs and prestressed concrete bridges are not unified,and the whole is still in the stage of accumulated experience. Chaoyanggou Reservoir Bridge has been completed in 2015, the 188m main span is the world's largest span among the partially prestressed concrete cable-stayed bridge with corrugated steel webs to now.This thesis takes Chaoyanggou Reservoir Bridge in Zhengzhou as an example,the design method and standard system of the partially prestressed concrete cable-stayed bridge with corrugated steel webs is studied systematically. By using the finite element analysis program to analyze the static and dynamic performances of Chaoyanggou Reservoir Bridge, the main research contents are as follows:1. The design of prestressed concrete bridge with corrugated steel webs should be within the framework of the unified ?standard for reliability design of Engineering structures?,and adopts the comprehensive technical requirements and checking computation contents of the local professional standards.2. The static analysis of Chaoyanggou Reservoir Bridge shows that the bridge's ultimate limit state?serviceability limit state?transient component stress?stress of persistent condition all accord with our country's departmental standard. It's also accord with local standard requirements on prestressed concrete box-girder bridge with corrugated steel webs. The risk analysis of the bridge indicates that the structural safety risk is under control during the construction period and operation period.3. The vibration modal analysis shows that the dynamic characteristics are similar to the part prestressed concrete cable-stayed bridge and the first 6 vibration modes of the main girder do not show torsion mode.