混凝土桥梁结构随机场的相关距离分析

对随机场理论应用于混凝土桥梁结构的必要性及其理论意义进行了分析和探讨,阐明了混凝土桥梁结构随机场的相关距离的计算是可靠度分析的前提。以肇源大桥为实例进行了预应力混凝土桥梁强度的现场大量实测,以此为基础建立了该桥的强度随机场,并对该随机场的齐次性和各态历经性进行了检验。分别用相关函数法和递推平均法得到了该随机场的相关距离。结果表明,两种方法得到的相关距离比较接近,认为该相关距离可以作为工程应用的理论指导,此相关距离也可应用于其他类似的桥梁结构上。

Correlation Distance Calculation on Random Field of the Concrete Bridge Structures

The importance and the theoretical significance of introducing random field theory into bridge structures are depicted in(details),and the calculation of the correlation distance on random field of concrete bridge structures as the base of reliability analysis is also depicted.Taking the bridge of Zhaoyuan as an example,the field stochastic measurement of the bridge strength is conducted,and a lot of data are collected.Based on this,the intensity of the random field of the bridge structure strength is constructed.The stationary and ergodic properties of the intensity of the random field of this bridge are examined.The autocovariance function method and the recurrence(average) method are taken to calculate the correlation distance.The results of these two methods are close,so this correlation distance can be used as the theoretical guidance of engineering application.The correlation distance achieved can be used for other similar bridges.