桩基概率极限状态设计中抗力分项系数的研究

The Study of the Partial Factors of Pile Resistances in Probabilistic Limit State Design

根据桩基工作机理，建立了桩基按概率极限状态设计的实用设计表达式，并按照《建筑结构设计统一标准》的规定对设计表达式中分项系数的内涵及规律进行了研究，提出了运用＂等β法＂确定抗力分项系数的方法。通过实例计算验证了此确定方法的可行性和可信性，为桩基由定值设计过渡到概率极限状态设计作了有益的探索。

On the basis of the work property of piles,the expression of probabilistic limit state design of pile foundation is defined.And,according to《The Unified Standard for Building 'Structure,the study of the partial factors in design expression is performed.Using the method of equivalent β,the partial factors of the resistances are determined.Through calculation of a example,the availability of the method is verified.