【摘要】 基于所建立的输电塔-导线体系空间有限元模型,利用非线性时程分析法研究了体系在行波输入下纵向地震反应特性,并和一致地震动输入下的反应情况进行比较。结果表明：行波输入可增加也可降低输电塔的地震反应,这与行波波速、地震动性质都有关系；行波输入很大程度上增加了导线的轴力反应,随着行波波速的提高导线轴力逐步降低并接近于一致输入时的情况；行波输入强烈地放大了导线的纵向和竖向位移反应,特别是后者在近断层地震波输入时；输电塔—导线体系的地震反应受行波波速影响很大。更多还原

【Abstract】 Based on the established model of the power transmission tower-cable system,the seismic response of which is analyzed with time history method.Furthermore,the seismic response under traveling seismic wave excitations is compared with that under uniform excitations,the result indicates that:the traveling seismic wave excitation can increase,or decrease the seismic response of the transmission tower-cable system,which depends on both the traveling-wave velocity and the ground motion characteristic;the traveling seismic wave excitations increase the cable’s axis force in a large scale,which will decrease gradually and is close to the case of uniform excitations along with the traveling wave velocity increasing;the traveling wave strongly magnifiy the cable’s displacement response on the longitudinal and vertical,especially the latter is under the excitations of the near-fault ground motions;the traveling wave velocity has a great effect on the seismic response of the power transmission tower-cable system.更多还原