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联合采用swipe加载模式、固定位移比与固定荷载比加载模式,对于裙板式浅基础在水平荷载与力矩荷载的复合加载条件下的承载性能进行比较系统的平面应变有限元分析,主要探讨了裙板式基础埋深、地基土不排水强度的非均质性对于基础破坏包络面的影响,揭示了地基在水平和力矩荷载的不同组合条件下的失稳破坏机制。同时,对于两种swipe加载模式的有效性进行了比较。计算结果表明:对于非均质土,当裙板式基础埋深与宽度之比大于0.3时,破坏包络面产生正方向倾斜;当埋深与宽度之比小于0.3时,基础的破坏包络面出现负方向倾斜。而在均质土中,基础的破坏包络面没有出现负方向倾斜。
The combination of swipe loading mode, fixed displacement ratio and fixed load ratio loading mode is used to analyze the plane strain of the shallow foundation under the composite loading of horizontal load and moment load. The main contents are as follows: The results show that the failure mechanism of foundation under different combinations of horizontal and moment loads is revealed. At the same time, the effectiveness of the two swipe loading modes is compared. The results show that for the heterogeneous soil, when the ratio of buried depth to width of apron is greater than 0.3, the destructive enveloping surface is inclined in the positive direction. When the ratio of depth to width is less than 0.3, Negative tilt appears. However, in the homogeneous soil, the basal destructive envelop did not appear to be tilted in the negative direction.