Interface Debonding Detection for CFSTs Based on Wavelet Packet Energy Spectrum with PZT
The interface debonding detection technique for Concrete-Filled Steel Tubes (CFST) is still a challeng ing problem due to the inaccessibility and invisibility of the defect and the current ultrasonic inspection meth od for the inner concrete core quality evaluation requires the interface is perfect.In this paper, by embed ding Piezoelectric Lead Zirconate Titanate (PZT) based functional smart aggregates (SAs) in concrete core as actuators and pasting PZT patches on the predetermined locations of the outer surfaces of the specimen as sensors, a novel active interface condition monitoring approach for CFST members is proposed firstly and is experimentally validated with a scale rectangular CFST specimen with artificially mimicked debonding defects using a damage index called weighted variation of wavelet packet energy spectrum (WVWPES) is defined to detect the artificially mimicked debonding regions.Then, the proposed approach is applied to evaluate the interfaces condition of a large rectangular CFST column of a super high-rise building.
Bing Li Bin Xu
College of Civil Engineering, Hunan University, Yuelu Mountain, Changsha, Hunan, China; College of C College of Civil Engineering, Hunan University, Yuelu Mountain, Changsha, Hunan, China
国际会议
哈尔滨
英文
803-810
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）