DAMAGE DETECTION IN REINFORCED CONCRETE BEAMS BY CHANGES OF CURVATURE MODAL SHAPES

摘要：

Modal curvature can be used to detect damages more easily than vibration mode difference,and author explained the researches in a mathematical point of view. Dynamic test is carried on 9 pieces of RC beams,which is subjected to an increasing static load in the middle to introduce cracks. After each load step,unloading,and an experimental dynamic monitoring is performed on the beam. Test data is analyzed by means of the system of Data Acquisition Signal Process,and the displacement modal is obtained. The curvature modal is gained from the displacement modal with second order differentiation method.The results show that curvature modal can identify the damage of RC simple-supported beam more accurately,and it is more sensitive to tiny damage.

关键词： RC beams Curvature modal Damage detection Error transmission

作者: Gang Xue Feng-Ge Li

作者单位: Department of Architecture and Civil Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,P.R.China

会议类型: 国际会议

会议名称: The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)

会议地点: 广州

会议语种:英文

页码: 450-453

在线出版日期: 2010-12-01（万方平台首次上网日期，不代表论文的发表时间）