| The most common construction method for the prestressed concrete continuous rigid frame bridge is the cantilever construction method.During the construction process,the line shape and structural force are constantly changing and developing.In order to achieve the ideal design of the line shape and the force state after the construction,the deformation and force of the bridge during the entire cantilever construction period must be monitored and controlled.Due to the structural characteristics of the pier beam consolidation,the main beam will also cause large internal forces and deformations when subjected to load or deformation.Therefore,it is necessary to analyze the force of the continuous rigid frame bridge pier under different working conditions.This paper takes the cantilever construction process of a typical continuous rigid frame bridge – Niu Zai Gu 1# bridge as the research background and Monitor the construction process of the bridge.Midas/Civil was used to simulate and calculate the construction process.This paper analyzes the deformation and force changes during the construction of the main beam and the influence of different factors on the shape of the bridge was analyzed.The monitoring scheme of the bridge and the results of construction monitoring are summarized.The force of the bridge pier is analyzed and the influence of the pushing on the pier before the closing and pile-soil effect on the stress is mainly analyzed.The dynamic characteristics of the bridge are calculated and the influence of pile-soil effect on the dynamic characteristics is analyzed.The response of continuous rigid frame bridge piers under seismic action is calculated by response spectrum method and time history analysis method.The stress characteristics of continuous rigid frame bridge piers under seismic loading are analyzed.The conclusion can be used to provide reference for the design and construction of continuous rigid frame bridge. |
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