摘要
位移影响线在桥梁检测领域具有重要作用,由于实桥检测采集到的数据中存在车辆动载效应,为得到桥梁准静态位移影响线需对采集到的信号做识别处理。本文以单孔跨径20 m的三跨连续梁模型为研究对象,分别用dbN小波变换、经验模态分解剔除桥梁中跨跨中位移影响线的波动部分。通过引入相关系数和建立误差指标,定量分析两种方法对位移影响线的识别效果与结果的可信度,通过分析两种方法对简支梁桥与连续梁桥位移影响线的识别效果,分别给出两种方法对不同桥梁结构的适用性。
Displacement influence line plays an important role in the field of bridge detection.In order to obtain the quasi-static displacement influence line of Bridges,the collected signals need to be recognized and processed because of the dynamic load effect of vehicles in the data collected by real bridge detection.In this paper,a three-span continuous beam model with a single-hole span of 20m is taken as the research object,and dbN wavelet transform and empirical mode decomposition are used to remove the fluctuation part of the influence line of mid-span displacement in the bridge.By introducing correlation coefficient and establishing error index,the identification effect of the two methods on displacement influence lines and the credibility of the results are quantitatively analyzed.By analyzing the identification effect of the two methods on displacement influence lines of simply supported beam bridge and continuous beam bridge,the applicability of the two methods to different bridge structures is given.
作者
尚稳齐
吴德义
SHANG Wen-qi;WU De-yi(College of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China)
出处
《南阳理工学院学报》
2022年第4期93-98,共6页
Journal of Nanyang Institute of Technology
关键词
动力响应
位移影响线
影响线识别
dbN小波变换
经验模态分解
dynamic response
displacement influence line
influence line identification
dbN wavelet transform
empirical mode decomposition
