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中文摘要：
在深入研究山区高桥墩-桩基结构屈曲机理基础上,首先,根据工程实际及桩柱式高桥墩-桩基结构平面受力模式,确定出符合工程特性的框架结构简化计算模型,其次,通过研究其失稳模式及内力计算方法,求得考虑高桥墩-桩基轴向变形的转角-位移方程,并结合能量分析方法建立桩柱式高桥墩-桩基结构平面内稳定性分析方法,然后,框架结构平面外受力特点确定出其稳定性分析力学模型,进而建立出考虑竖向荷载与水平荷载共同作用时高桥墩-桩基结构平面外稳定性分析方法,工程实例分析表明,考虑高桥墩与桩基共同作用的框架结构稳定系数比高桥墩框架结构稳定系数低,符合工程实际,表明了本文所建立方法的合理性与可行性。
英文摘要：
Based on lucubrating of the buckling mechanism of higher pile-column bridge pier and pile structure, the simplified calculating model of frame structure with practical engineering feature was firstly confirmed according to the engineering practical and the plane bearing model of higher pile-column bridge pier and pile structure. Secondly, the corner and displacement equation was gained by studying the instability mode and internal force calculating method, which considered the axis distortion of higher bridge pier and pile. And the plane inside stability analysis method of higher pile-column bridge pier and pile structure was established combining the energy analysis method. Then, the mechanics model of frame structure plane outside stability analysis was confirmed by its bearing feature. And the plane outside stability analysis method of higher pile-column bridge pier and pile structure was set up, which can reflect the together action of vertical load and level load. Engineering example analysis shows that the sta- bility coefficient of the frame structure of higher bridge pier and pile together action is lower than the higher bridge pie frame structure＇s, which is according to the engineering practical. And it indicates the rationality and feasibility of the method proposed.
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