TY - GEN
T1 - Dynamic characteristics of a cable-stayed bridge measured from traffic-induced vibrations
AU - Wang, Yun Che
AU - Chen, Chern Hwa
PY - 2012
Y1 - 2012
N2 - This paper studies the dynamic characteristics of the Kao-Ping-Hsi cable-stayed bridge under daily traffic conditions. Experimental data were measured from a structural monitoring system, and system-identification techniques, such as the random decrement (RD) technique and Ibrahim time-domain (ITD) method, were adopted. The first five modes of the bridge were identified for their natural frequencies and damping ratios under different traffic loading conditions, in terms of root-mean-square (RMS) deck velocities. The magnitude of the torsion mode of the Kao-Ping-Hsi cable-stayed bridge is found to be one order-of-magnitude less than the transfer mode, and two orders-of-magnitude less than the vertical modes. Out results indicated that vibrations induced by traffic flow can be used as an indicator to monitor the health of the bridge due to their insensitivity to the natural frequencies of the cable-stayed bridge. Furthermore, the damping ratios may be used as a more sensitive indicator to describe the condition of the bridge.
AB - This paper studies the dynamic characteristics of the Kao-Ping-Hsi cable-stayed bridge under daily traffic conditions. Experimental data were measured from a structural monitoring system, and system-identification techniques, such as the random decrement (RD) technique and Ibrahim time-domain (ITD) method, were adopted. The first five modes of the bridge were identified for their natural frequencies and damping ratios under different traffic loading conditions, in terms of root-mean-square (RMS) deck velocities. The magnitude of the torsion mode of the Kao-Ping-Hsi cable-stayed bridge is found to be one order-of-magnitude less than the transfer mode, and two orders-of-magnitude less than the vertical modes. Out results indicated that vibrations induced by traffic flow can be used as an indicator to monitor the health of the bridge due to their insensitivity to the natural frequencies of the cable-stayed bridge. Furthermore, the damping ratios may be used as a more sensitive indicator to describe the condition of the bridge.
UR - http://www.scopus.com/inward/record.url?scp=84883059289&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84883059289&partnerID=8YFLogxK
U2 - 10.1063/1.4756648
DO - 10.1063/1.4756648
M3 - Conference contribution
AN - SCOPUS:84883059289
SN - 9780735410916
T3 - AIP Conference Proceedings
SP - 2278
EP - 2281
BT - Numerical Analysis and Applied Mathematics, ICNAAM 2012 - International Conference of Numerical Analysis and Applied Mathematics
T2 - International Conference of Numerical Analysis and Applied Mathematics, ICNAAM 2012
Y2 - 19 September 2012 through 25 September 2012
ER -