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在既有结构的可靠性评定中,目前对单个构件当前抗力的推断并没有明确的方法,为此分别提出了基于几何参数、材料性能测试结果和基于相关性分析的推断方法。两种方法均考虑了既有构件的特点、几何参数和材料性能的信息以及测量不确定性、空间不确定性对测试结果的影响,第二种方法还充分利用了与抗力相关的刚度、挠度、裂缝宽度等其他方面的信息,使构件抗力的推断建立在更充实的信息基础上。实例分析的结果表明,在测试结果相同的情况下,采用基于几何参数、材料性能测试结果的推断方法可得到更有利的抗力推断结果,采用基于相关性分析的推断方法可正确反映刚度等对抗力推断结果的影响。
In the reliability assessment of existing structures, there is no clear way to infer the current resistance of a single component at present. Therefore, based on the geometric parameters, material property test results and inference methods based on the correlation analysis, respectively. Both methods take into account the characteristics of existing components, the information of geometrical parameters and material properties as well as the influence of measurement uncertainty and spatial uncertainty on the test results. The second method also takes full advantage of the resistance-related stiffness, deflection , Crack width and other aspects of the information to make the components of resistance inferred based on more substantial information. The results of the example analysis show that when the test results are the same, more favorable inference results can be obtained by using the inference method based on the geometric parameters and the material property test results, and the inference method based on the correlation analysis can correctly reflect the rigidity and other countermeasures Inferred the impact of the results.