超高悬挑结构支撑架体顶部立杆受力状态分析

Stress analysis on the top pole of supporting frames in high cantilevered structure

以渡江战役纪念馆为工程背景,将高支撑体系离散化,分别对施工中型钢混凝土梁、架体进行位移计算。根据相对位移量判定结构与架体的相对运动趋势,确定了结构与架体共同作用下支撑立杆顶部的复杂应力状态,揭示了与悬挑结构接触立杆顶部存在拉应力的力学机理,并得到了现场实测验证,为今后类似工程设计与施工提供了理论参考依据。

The paper demostrates the Yangtze-Crossing Campaign Memorial as the project background and calculates to the displacement of shape steel concrete beams and frames during the construction,by ultilizing the discretization to the high-support system.The calculation determines the relative motion trends between structures and frames based on the quantities of relative displacement,confirms the complexible stress status of the top of corbelled erect pole under the synergistic effect of structures and frames,reveals the existance of a mechanics mechanism that there is tension stress at the top of erect pole osculating with cantilever structure and the mechanism has been tested and validated at the work field.Those calculation will provide a theoretical reference for similar project design and construction in the future.