Traveling wave effect on longitudinal seismic response of the long-span power transmission tower-cable system

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (10) : 236-240.

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Traveling wave effect on longitudinal seismic response of the long-span power transmission tower-cable system

WEI Qi-ke; LI Zheng-liang

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Abstract

Because of the high tower and long-span of the ultra-high voltage long-span transmission tower-cable system that is not enough only considering seismic responses of the system under the uniform excitation. Based on the established precise 3D finite element model of the ultra-high voltage long-span transmission tower-cable system, the longitudinal seismic responses characteristics of the system are researched under traveling wave excitation and compared with those under uniform excitation, through the geometric nonlinearity dynamic time history integration method. The results show that the traveling wave excitation can increase, or decrease the seismic responses of the transmission tower, which are mainly related to the phase difference; the effect of the traveling wave on the line’s displacement responses is obviously in the vertical direction, but is not significant on the line’s axial force.

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traveling wave effect / phase difference / power transmission tower-cable system / geometric nonlinearity / time history analysis / uniform excitation / seismic response

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WEI Qi-ke; LI Zheng-liang. Traveling wave effect on longitudinal seismic response of the long-span power transmission tower-cable system[J]. Journal of Vibration and Shock, 2011, 30(10): 236-240