System identification was performed on the swing span of a steel truss bridge using a wireless sensor network. The swing span can rotate 360° to allow river traffic to pass through the locks located under the bridge. The twenty-two wireless sensor nodes were installed on the span to measure synchronized tri-axial acceleration. Modal properties of the bridge according to its different positions were successfully obtained using frequency domain decomposition method, and compared with the ones from the FE model of the bridge.

• 조수진(울산과학기술대학교 연구조교수, 공학박사) | Cho, Soojin 교신저자
• Billie F. Spencer, Jr.(University of Illinois at Urbana-Champaign 교수, 공학박사)
• 심성한(울산과학기술대학교 조교수, 공학박사) | Sim, Sung-Han