Abstract
The excessive longitudinal horizontal displacement of pier top has become one of the common defects of high-pier bridge, which seriously affects the safety of the bridge structure. In order to determine the influencing factors of the horizontal displacement of the pier top of high-pile and high-pier bridges, this paper establishes the finite element model of the whole bridge based on the high-pile and high-pier bridge of the Qianhuang Expressway, and considers the influence of dead load, vehicle load, vehicle braking force, temperature load, bearing friction coefficient, and bearing under eccentric compression on the horizontal displacement of the pier top. By comparing and analyzing the law of various factors influence on the horizontal displacement of the pier top, the main causes of the horizontal displacement of the pier top of high-pile and high-pier bridges are summarized, which can provide reference for the analysis of pier top deviation of similar high-pile and high-pier bridges.
Highlights
With the development of Chinese economy, construction of highway bridges in mountainous regions has been implemented increasingly, many highways have to cross deep gullies and river valleys
As to the deviation of pier top of high-pier bridge in operation stage, Tian Shiqing et al [6] believe that there is an obvious relationship between the pier deviation and the slope of beam-bearing contact surface caused by the bearing installation defects
Wu Hongye [7] summarized the influence of bearing installation defects on the stress of high-pier bridge and concluded that the non-level sliding surface of the pot bearing is the direct cause of pier top deviation
Summary
With the development of Chinese economy, construction of highway bridges in mountainous regions has been implemented increasingly, many highways have to cross deep gullies and river valleys. Piers with obvious longitudinal horizontal deviation have other defects such as bearing exceeding slip displacement limit, bearing shear failure, main beam sliding, pier annular crack etc. These defects seriously affect the bridge safety [2,3,4,5]. As to the deviation of pier top of high-pier bridge in operation stage, Tian Shiqing et al [6] believe that there is an obvious relationship between the pier deviation and the slope of beam-bearing contact surface caused by the bearing installation defects. This paper summarizes the main factors affecting the horizontal pier top deviation of the high-pile and high-pier bridge
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