基于多阶曲率模态差的桥梁损伤定位方法  

Bridge Damage Location Method Based on Multi Order Curvature Modal Difference

作　　者：唐伟军[1,2] 曹绍林[1,2] 朱秀清 TANG Wei-jun;CAO Shao-lin;ZHU Xiu-qing(Guangzhou Shengtong Quality Testing of Construction Co.,Ltd.,Guangzhou 510075;Information Technology Institute of Jinan University,Guangzhou 510075)

机构地区：[1]广州市盛通建设工程质量检测有限公司,广州510075 [2]暨南大学信息技术研究所,广州510075

出　　处：《广州建筑》2023年第5期45-48,共4页GUANGZHOU ARCHITECTURE

摘　　要：为了保障桥梁结构正常运营,及时发现桥梁损伤,本文提出了多阶曲率模态差(multi order curvature mode difference,简称MOCMD)损伤指标进行桥梁结构损伤位置的识别。为了验证本文方法的有效性,通过数值模拟建立一简支梁桥有限元模型,研究不同损伤程度、损伤位置和噪声水平对该指标的影响。数值模拟结果表明,该指标能够精确识别多个工况损伤位置,而且具有一定抗噪性。In order to ensure the normal operation of bridge structures and detect bridge damage in time,this paper proposes a multi order curvature modal difference damage index for identifying the damage location of bridge structures.To verify the effectiveness of the method proposed in this paper,a finite element model of a simply supported beam bridge was established through numerical simulation to study the effects of different damage severities,damage locations and noise levels on this indicator.The numerical simulation results show that this indicator can accurately identify the damage locations of multiple scenarios and has a certain degree of noise resistance.

关 键 词：损伤识别 多阶曲率模态差 有限元 模态分析 抗噪性 

分 类 号：TU312.3[建筑科学—结构工程]