지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.20 No.2
- 발행연도
- 2017.1
- 수록면
- 175 - 180 (6page)
이용수
초록· 키워드
오류제보하기
The load-carrying capacity and structural behavior of concrete-filled steel tube (CFST) structures is highly influenced by the grouting compactness in the steel tube. Due to the invisibility of the grout in the steel tube, monitoring of the grouting progress in such a structure is still a challenge. This paper develops an active sensing approach with combined piezoceramic-based smart aggregates (SA) and piezoceramic patches to monitor the grouting compactness of CFST bridge structure. A small-scale steel specimen was designed and fabricated to simulate CFST bridge structure in this research. Before casting, four SAs and two piezoceramic patches were installed in the pre-determined locations of the specimen. In the active sensing approach, selected SAs were utilized as actuators to generate designed stress waves, which were detected by other SAs or piezoceramic patch sensors. Since concrete functions as a wave conduit, the stress wave response can be only detected when the wave path between the actuator and the sensor is filled with concrete. For the sake of monitoring the grouting progress, the steel tube specimen was grouted in four stages, and each stage held three days for cement drying. Experimental results show that the received sensor signals in time domain clearly indicate the change of the signal amplitude before and after the wave path is filled with concrete. Further, a wavelet packet-based energy index matrix (WPEIM) was developed to compute signal energy of the received signals. The computed signal energies of the sensors shown in the WPEIM demonstrate the feasibility of the proposed method in the monitoring of the grouting progress.
목차
등록된 정보가 없습니다.
참고문헌 (38)
참고문헌 신청
Chen, L. / 2011 / Debonding defect detection for concrete filled steel tubular using knocking technique / China Concrete 1:54~56
Feng, M. Q. / 2002 / Use of microwaves for damage detection of fiber reinforced polymerwrapped concrete structures / J. Eng. Mech. -ASCE 128(2):172~183
Feng, Q. / 2015 / Crack detection and leakage monitoring on reinforced concrete pipe / Smart Mater. Struct 24(11):115020
Feng, Q. / 2013 / Design of remote real time monitoring system based on GPRS for railway roadbed subsidence / J. Geodesy Geodynam 6:155~157
Hou, S. / 2012 / A PZT-based smart aggregate for compressive seismic stress monitoring / Smart Mater. Struct 21(10):105035
Feng, M. Q. / 2002 / Use of microwaves for damage detection of fiber reinforced polymerwrapped concrete structures / J. Eng. Mech. -ASCE 128(2):172~183
Feng, Q. / 2015 / Crack detection and leakage monitoring on reinforced concrete pipe / Smart Mater. Struct 24(11):115020
Feng, Q. / 2013 / Design of remote real time monitoring system based on GPRS for railway roadbed subsidence / J. Geodesy Geodynam 6:155~157
Hou, S. / 2012 / A PZT-based smart aggregate for compressive seismic stress monitoring / Smart Mater. Struct 21(10):105035
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