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既有结构材料强度的统计推断是既有结构可靠性评定中的一项关键工作。针对目前既有结构材料强度推断方法在理论上存在的缺陷,利用信度理论研究回弹法、钻芯法检测推断混凝土强度的新方法:针对实际工程中常用的回弹—钻芯综合法,建立了信息基础不同的三组构件的混凝土强度推断方法,形成基于信度理论的回弹—钻芯综合检测推断方法。论文提出的信度推断方法,能够合理地考虑测量不确定性的影响;同时,论文充分考虑了被测构件本身所提供的信息,使得既有结构材料强度的推断过程更为完整。
The statistical inference of the strength of existing structural materials is a key task in the reliability assessment of existing structures. Aiming at the shortcomings of theoretically existing method for estimating the strength of structural materials, a new method of testing rebound method and core drilling method to infer the strength of concrete is put forward based on reliability theory. According to the common method of rebound-core integrated in practical engineering, The method of inference of concrete strength based on three groups of different information foundation is established to form the method of rebound-core integrated detection based on reliability theory. The method proposed in this paper can reasonably consider the influence of measurement uncertainty. In the meantime, the paper fully considers the information provided by the component under test and makes the estimation of strength of the existing structure more complete.