大悬臂连续刚构桥梁施工稳定性分析研究

STUDY ON STABILITYANALYSIS OF LARGE CANTILEVER CONTINUOUS RIGID FRAME BRIDGE CONSTRUCTION

以某大桥连续刚构联段为研究对象,运用欧拉弹性理论结合有限元分析方法,研究对温泉特大桥连续刚构联段各施工阶段的空间稳定性进行了分析。通过分析多工况下的稳定性,对桥梁主墩封顶阶段、T形桥梁结构(下称T构)的最大悬臂阶段和成桥阶段等3个关键阶段,总结了连续刚构桥悬臂冬季期间可能对施工监控产生影响的各项因素。对各项因素进行荷载分析与组合,并结合有限元建模计算得出了具体的影响值。对了解该桥及该类型桥梁主要施工阶段的稳定性状况具有参考意义。

Taking the continuous rigid frame connection section of a certain bridge as the research object,the spatial stability of the continuous rigid frame connection section of the wenquan extra large bridge during various construction stages was analyzed using Euler elastic theory combined with finite element analysis method.By analyzing the stability of the bridge under multiple working conditions in three key stages:the top sealing stage of the main pier,the maximum cantilever stage of the bridge T-structure,and the completion stage,various factors that may affect the construction monitoring of the continuous steel frame bridge cantilever during winter were summarized.load analysis and combination of various factors were conducted,and specific impact values were calculated through finite element modeling.It has reference significance for understanding the stability status of this bridge and its main construction stages.