ABSTRACT
This paper describes an ongoing research work on the seismic monitoring of cable-stayed bridge using wireless sensor network. Newly developed wireless sensor network that is based on simultaneous high-speed flooding technique which is effective in transmitting the packets at the same timing without causing synchronization to the carrier frequency or phase. The wireless network monitoring system was implemented on the Shin-Nakagawa Bridge, 530-m single-plane single-pylon steel-box girder cable-stayed bridge in Ibaraki prefecture in Japan. The bridge girder is seismically isolated with rubber bearings and damper at the main pylon and piers. A total of 26 sensor nodes were installed at several locations, namely, the piers, main pylon, girder and on the ground. The monitoring system has been in place since the summer 2017 and successfully recorded structural responses from more than twenty small-to-moderate scale earthquakes until now (December 2019). This paper explains the wireless sensor system, monitoring system, recorded earthquakes and structural analysis using recorded earthquakes.
