The structure model including beams,slabs,and columns was set up by using the finite element analysis soft-ware ANSYS. The influence of uneven settlement of foundation on upper frame structure was simulated and analyzed. In the simulation,four kinds of conditions including S 1 ,S 2 ,S 3 ,and S 4 were set. Under the condition of S4 ,the contrasted settlement was set to be twice as much as the settlements of the fore three working conditions. The results show that under the condition of the uneven settlement of foundation being the same,the influence of uneven settlement of mid-span found-ation on the upper frame component is larger than that of the side-span. When the foundation uneven settlement occurs, the adjacent beam with smaller span is more prone to damage under the same settlement condition.%运用有限元分析软件ANSYS,建立含有梁、板和柱的结构模型,模拟分析基础不均匀沉降对上部框架结构的影响;在模拟中设置S1、S 2、S 3、S 4这4种工况,设置S 4工况下的对照沉降量是前3种工况下沉降量的2倍.结果表明:在基础不均匀沉降量相同的条件下,中跨基础不均匀沉降对上部框架构件的影响程度比边跨的大;当基础发生不均匀沉降时,在相同的沉降条件下,跨度较小的相邻梁更容易产生破坏.
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