基于频率校验系数快速评定桥梁结构承载力  

Rapid Assessment of Bridge Structures Bearing Capacity Based on Frequency Coefficient

作　　者：邹兰林[1] 彭冬 

机构地区：[1]武汉科技大学汽车与交通工程学院,湖北武汉430081 [2]孝感市公路管理局,湖北孝感432000

出　　处：《山东交通学院学报》2010年第3期31-35,共5页Journal of Shandong Jiaotong University

基　　金：国家自然科学基金资助项目(50978207)

摘　　要：提出一种基于频率校验系数的快速评定桥梁结构承载力的评定方法。建立频率校验系数与挠度校验系数之间的理论关系,并以173座样本桥梁分析结果对2个系数进行修正。结合静载试验评定结果,确定挠度校验系数的合理取值范围,按回归关系换算出相应的频率校验系数评定标准。结果表明,频率校验系数大于1.105时,结构承载力满足要求,并有一定安全储备;小于1.076时,结构承载力不足;频率校验系数介于两者之间时,结构承载力有待进一步评定。A quick method to evaluate the bearing capacity of bridge structures is put forward, on the basis of the frequency coefficient method. The relation between frequency coefficient and deflection coefficient was established based on theory, and it was revised by the statistics results of 173 samples. The assessment criterion of frequency coefficient was built by regression equation based on the confirmed range of deflection coefficient. The results show that the structure is secure and with safety margin when the frequency coefficient is greater than 1. 105, the structure is dangerous when the frequency coefficient is less than 1. 076, and the bearing capacity needs to be evaluated further when the coefficient is betweenl. 105 and 1. 076.

关 键 词：频率校验系数 快速评定 承载力 回归分析 

分 类 号：U441[建筑科学—桥梁与隧道工程]