摘要
提出时程曲率这一概念,运用折减刚度法模拟简支梁的不同位置、不同程度的损伤,得到结构典型位置在匀速移动荷载作用下的时间历程动位移响应,利用结构损伤处时程位移响应曲率幅值出现突变的特点,取时程曲率差的绝对值作为结构损伤识别指标来识别结构损伤位置。相对于传统桥梁损伤识别方法,时程曲率差法可人为设置采样点,高频连续采集,不会受限于测点数量及测点布设位置的影响。
Presenting the concept of time-history curvature,and using the reduction stiffness method to simulate the different positions and degrees of damage of simply supported beam,the time-history dynamic displacement response of the structures is obtained under the uniform moving load,and the absolute value of the time-history curvature difference is taken as the structural damage identification index to identify the structural damage location by using the abrupt change of the curvature amplitude of the time displacement response of the structural damage. Compared with traditional damage identification method,the time-history curvature difference method can artificially set the sampling point with the high-frequency continuous acquisition and not be limited by the number of measurement points and the location of measuring points.
作者
成魁
tian zhong-chu
CHENG Kui;TIAN Zhong-chu(School of Civil Engineering,Changsha University of Science ＆ Technology,Changsha,Hunan,410114)
出处
《黑龙江交通科技》
2018年第4期87-89,共3页
Communications Science and Technology Heilongjiang
关键词
时程曲率
结构损伤识别指标
匀速常量力
位移时程曲线
Time-history Curvature
Damage Identification of Structures
Uniform Constant Force
Displacement Time-History Curve
