混凝土悬臂梁损伤位置识别研究  

Study on Damage Location of Concrete Cantilever Beam

作　　者：艾智丹 何军保 顾永强[1] 

机构地区：[1]内蒙古科技大学建筑与土木工程学院,内蒙古包头014010 [2]南京工业大学土木工程学院,江苏南京210000

出　　处：《三明学院学报》2015年第4期77-82,共6页Journal of Sanming University

摘　　要：为了研究混凝土悬臂梁损伤位置的动力识别问题,利用ANSYS软件,建立了损伤前后的不同模型,得到了悬臂梁损伤前后的前六阶频率变化规律,提取不同位置的振动位移,通过节点位移得到振型模态。由振型模态计算其曲率模态,由曲率模态引入的"D"值曲线在损伤位置会出现"尖峰",通过"尖峰"位置可以较准确的判定损伤位置。In order to study dynamic identification problem of concrete cantilever beam on damage locations, ANSYS software is used to build different models before and after damage, and six order frequency variation rule of before and after damage cantilever beam is obtained. Extracting vibration displacement of different locations, mode shape is obtained by joint displacement. Its curvature mode can be obtained with mode shape. ＂D＂ value curve which is imported by curvature mode appears ＂peak＂ on damage locations, and damage locations can be judged accurately by ＂peak＂.

关 键 词：混凝土悬臂梁 ANSYS 损伤识别 曲率模态 损伤定位 

分 类 号：TU375.1[建筑科学—结构工程]