本文根据64个偏心局部承压试验结果和70个国外试验数据发现相对偏心距对局部承压强度的影响符合线性降低规律,提出了确定计算底面积A_d取值的新法则—同心对称有效面积法,论证了采用此法则时偏心及轴心局部承压可以采用统一的强度计算公式,可以等效表达偏心局部承压强度的线性降低规律。局部承压强度也可以做到自动限值。 Based on the results of 64 eccentric partial pressure tests and 70 foreign test data, this paper finds that the influence of relative eccentricity on the local bearing strength is in line with the law of linear reduction, and proposes a new rule to determine the value of calculated bottom area A_d—concentric symmetrical effective area method. It is demonstrated that when this law is adopted, the eccentricity and the axial partial pressure can adopt a unified strength calculation formula, which can equivalently express the linear decreasing law of the eccentric partial bearing strength. The local bearing strength can also be automatically limited.