Study on Durability Design and Measures of Expressway Super-large Bridges——Taking the Yellow River Bridge Project on the Puyang to Hubei Yangxin County Expressway as an Example
Study on Durability Design and Measures of Expressway Super-large Bridges——Taking the Yellow River Bridge Project on the Puyang to Hubei Yangxin County Expressway as an Example
This paper takes the project of the Super-large Bridge of the Yellow River(the second phase of the Puyang section)of the Puyang-yangxin County Expressway in Henan Province as the research object,in the design and construction of the project,analyzes the issues of the controlled factors of the middle span of continuous beam,the seismic fortification intensity of wandering river and the hydrology of complex geological environment,and carries out the anti-seismic control of bridge durability.By calculating the durability and shock wave aseismic test,we can judge whether the design and anti-seismic control of the Super-large Bridge of the Yellow River meet the requirements of durability.At the same time,combined with practical examples and experiment results,this paper presents the design scheme of the prestressed concrete box girder and the seismic prevention and control with the friction pendulum bearing,and points out the durability control of the concrete structure is an important measure to ensure the structural safety.
关键词
桥梁工程/特大型桥梁/耐久性设计/减震与隔震/防控抗震/连续梁桥
Key words
bridge engineering/super-large bridge/durability design/shock absorption and isolation/seismic prevention and control/continuous beam bridge
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