连续刚构桥超高墩非线性稳定性影响研究  

Study on Nonlinear Stability of Super-High Pier of Continuous Rigid Frame Bridge

作　　者：周小东 孙亚刚[1] 乔星昇 ZHOU Xiao-dong;SUN Ya-gang;QIAO Xing-sheng(Xi'an Municipal Engineering Design&Rescarch Institute Co.Ltd,Xi'an 710068.China)

机构地区：[1]西安市政设计研究院有限公司,西安710068

出　　处：《工程建设与设计》2023年第2期90-92,共3页Construction & Design for Engineering

摘　　要：目前,对于连续刚构桥超高墩稳定性的研究多偏于理论,论文以实际工程为例,对比采用线性与非线性分析方法的影响差异,分析不同墩高和墩形对超高墩稳定性的影响。结果表明,几何非线性在超高墩的挠曲变形中所占比例较大,材料非线性次之;墩高超过125m后超高墩效应趋势明显增大;应根据稳定性和抗推刚度大小的范围选取适宜的墩形。At present, the research on the stability of super-high pier of continuous rigid frame bridge is mostly theoretical. Taking practical engineering as an example, this paper compares the influence difference between linear and nonlinear analysis methods, and analyzes the influence of different pier height and shape on the stability of ultra-high pier. The results show that geometric nonlinearity accounts for a large proportion in the flexural deformation of super-high pier, followed by material nonlinearity;When the pier height exceeds 125 m, the effect of super-high pier increases obviously;The appropriate pier shape shall be selected according to the range of stability and thrust stiffness.

关 键 词：连续刚构桥 超高墩 稳定性 非线性 悬臂施工 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]