基于均布荷载面变化率的桥梁损伤识别  

Bridge Damage Identification Based on the Change Rate of Uniform Load Surface

作　　者：朱秀清 曹绍林[1,2] 唐伟军[1,2] ZHU Xiuqing;CAO Shaolin;TANG Weijun(Guangzhou Shengtong Quality Testing of Construction Co.,Ltd.Guangzhou 510075,China;Information Technology Institute of Jinan University Guangzhou 510075,China)

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：《广东土木与建筑》2023年第11期57-60,共4页Guangdong Architecture Civil Engineering

摘　　要：为了利用桥梁结构的振动信息对桥梁关键部位进行损伤识别,提出以均布荷载面变化率作为损伤指标来识别桥梁损伤位置的方法。为了验证该方法有效性,采用一个简支梁有限元模型,考虑各个损伤位置与损伤程度对损伤识别的影响,将均布荷载面变化率与传统方法中的振型差和曲率模态差两个损伤指标进行了比较,数值模拟的结果表明,均布荷载面变化率的损伤新指标与振型差和曲率模态差两个传统指标相比,具有良好的损伤识别效果。In order to use the vibration information of the bridge structure to detect damage to key positions of the bridge,proposes a method of using the change rate of uniform load surface as a damage indicator to detect damage locations of the bridge.To verify the effectiveness of this method,a simply supported beam finite element model was used considering the impact of damage location and severity on damage identification.The change rate of uniform load surface is compared with two damage indicators of mode shape difference and curvature of the mode shape difference in traditional methods.The numerical simulation results show that the new damage indicator based on the change rate of uniform load surface can accurately detect the damage.Compared to the traditional indicators of modal shape difference and curvature of the modal shape difference,it has good damage identification effect.

关 键 词：损伤识别 均布荷载面 简支梁 抗噪性 有限元分析 

分 类 号：TU312.3[建筑科学—结构工程]