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通过统计结构表面的裂缝总量,来推断结构的承载能力现状或者剩余承载力,从而提出了一种混凝土桥梁性能评估的新方法.该方法使用有限元数值分析程序来模拟混凝土的开裂过程,采用正交试验来研究性能与裂缝之间的多元关系.试验包括两部分:(1)筛选试验,该试验确定对性能与裂缝关系影响较大的因素集;(2)回归试验,该试验建立包含这些因素的性能-裂缝多元关系.试验结果表明,利用仅包含少数主要影响因素的回归模型,可以得到对性能的较为准确的推断.因此,这种方法是可行的,并且由于其经济性和便利性,可以作为桥梁管理系统中定期评估的有效手段.
A new method for evaluating the performance of concrete bridges is proposed by statistical analysis of the total amount of cracks on the surface of the structure to estimate the current carrying capacity or residual bearing capacity of the structure.The method uses finite element numerical analysis program to simulate the cracking process of concrete, Orthogonal test to study the relationship between performance and fracture multivariate test includes two parts: (1) screening test, the test to determine the relationship between performance and fracture greater factor set; (2) regression test, the experiment to establish a The performance of these factors - the multivariate relationship between fractures.The experimental results show that using a regression model that includes only a few major influencing factors, a more accurate inference can be obtained for performance, and this approach is therefore viable and, due to its economy and convenience It can be used as an effective means of periodic assessment in bridge management systems.