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利用有限元法,通过对一栋12 层钢筋混凝土框架结构在10 种地基土支承损失条件下,土与上部结构协同工作的三维分析,探讨了框架柱内力变化的基本趋势.结果表明,支承损失对柱子轴力影响很小,对弯矩值的影响较大;但随着楼层的增高和表示地基土支承损失的土中孔洞尺寸的减小,以及其所在位置与基础地面距离的加大,对柱弯矩的影响逐渐减小.
Using the finite element method, through the three-dimensional analysis of a 12-story reinforced concrete frame structure under the condition of 10 kinds of foundation soil bearing loss and the collaborative work between the soil and the superstructure, the basic trend of the internal force of the frame column was discussed. The results show that the bearing loss has little effect on the axial force of the column and has a greater influence on the bending moment; however, with the increase of the floor and the decrease of the size of the hole in the soil that represents the bearing loss of the foundation soil, as well as its location and foundation ground As the distance increases, the effect on the bending moment of the column gradually decreases.