Energy dissipation and absorption capacity influence on experimental modal parameters of a PC girder

12th International Conference on Damage Assessment of Structures

Luna Vera, O.S.^1 ; Kim, C.W.^1 ; Oshima, Y.^2

Infrastructure Innovation Engineering Laboratory, Department of Civil and Earth Resources Engineering, Graduate School of Engineering, Kyoto University, Japan^1

Center for Advanced Engineering Structural Assessment and Research (CAESAR), Public Works Research Institute (PWRI), Tsukuba, Japan^2

关键词: Absorption capacity;    Bottom surfaces;    Damage events;    Experimental investigations;    Experimental modal parameters;    Impact hammers;    Modal parameters;    Vibration data;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/842/1/012038/pdf
DOI  :  10.1088/1742-6596/842/1/012038

来源: IOP

【 摘 要 】

This experimental investigation focuses on collecting vibration data after different loading scenarios in a PC girder while measuring the performance at the same time. The vibration data is used for modal analysis and since several samples were taken in each scenario with different impact hammer tips, a comparison of the outcomes is also possible. The performance is based on recorded displacements along the bottom surface of the girder, information that makes possible the calculation of energy absorbed before cracking and the energy dissipation that takes place after cracking. Furthermore, two major damage events, a tendon breakage and cracking, were induced and monitored respectively. This study also clarified the influence of change in energy on changes in modal parameters.