独柱空心薄壁墩剪切变形对抗震性能的影响研究

Study on the Influence of Single Column Hollow Thin-walled Pier Shear Deformation on Anti-seismic Property

西部地区地质构造复杂、地震多发、山区坡面陡峻处的公路简支梁桥下部结构多采用抗震能力好的独柱空心薄壁墩。通过对独柱空心薄壁墩采用Euler-Bernoulli梁理论和Timoshenko梁理论研究,运用有限元分析方法进行结构的静力和动力分析,对比研究剪切变形对墩柱抗震性能的影响,提出了高烈度地区简支体系桥梁独柱空心薄壁墩剪切变形对抗震性能的影响因素及计算方法。该方法计算精度高、速度快,对高烈度地区公路桥梁抗震性能研究具有很好的借鉴价值。

Owing to the complex and earthquake-prone geological structure in western China,the supporting structure of charpy bridges located in the steep mountain slope on road mostly adopt single column hollow thin-walled pier which is of fine anti-seismic property.On the basis of Euler-Bernoulli beam theory and Timoshenko beam theory for single column hollow thin-walled pier.This paper uses the finite element method for static and dynamic analysis of structure,it makes a comparative study on the impact of shear deformation on the seismic performance of the pier column,it proposes the calculation method and factors having influences on the seismic properties of charpy bridges with single column hollow thin-walled pier shear deformation in high earthquake intensity areas.This calculationmethod is of high accuracy,fast speed,and has very good reference value to study the seismic performance of Highway Bridge in high earthquake intensity area.