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以底面为方形的基础为例,通过对双向偏心压力的矢量求和将双向偏心问题转化为单向偏心问题,提出了双向偏心压力作用下基础底面脱开后的基础底面反力和脱开面积的计算方法,该方法便于计算程序的实现,补充了规范尚无规定的脱开面积的计算。对该方法与规范的计算结果进行了比较,计算结果与规范一致,计算误差不大于5‰,能够满足工程设计的精度要求。
Taking the foundation of the square bottom as an example, the bidirectional eccentricity problem is transformed into a unidirectional eccentricity problem by vector summation of bidirectional decentering pressure. The base reaction force and the disengagement area under the unbalanced biasing pressure are put forward. The method is easy to calculate the implementation of the program, to supplement the specification does not require the calculation of the area off. The results of the method and the standard are compared. The calculation results are consistent with the specifications. The calculation error is not more than 5 ‰, which can meet the accuracy requirements of engineering design.