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论文类型：会议论文

发表时间：2008-01-01

收录刊物：CPCI-S

页面范围：100-130

关键字：transmission tower-line system; earthquake action; wind (rain) loading action; dynamic characteristics and responses; fatigue reliability

摘要：According to earthquake action, wind (rain) excitation and struictural characteristics, the problems related with earthquake response, wind-rain induced response and fatigue reliability of TLS are conducted fundamentally theoretical studies, so that the simple dynamic model for earthquake response analysis of whole structre, the analytical model of wind-rain excited structural response and analysis method of structural fatigue reliability are built, and the calculation method of rain forcing and its combination principles of acting on TTLS together with wind are presented. Theoretical and experimental analyses indicate that: as the increasing of neighbourhood tower distance and the softening subground, the wire contribution of dynamic response to transmission tower Is inclined to enlarge; the accessional effects which the motion coupled properties of TLS influence on structural dynamic characteristics should not be neglected; it is obvious that rainfall occurred simultaneously together with wind have distinct effect on responses of TLS; the reasons which cause the structural consecutive collapse is wind and rain combination excitation as well as dynamic-press-unstability of local structures; the fatigue reliability indices are related to stress peak distribution assumption and coherence degree of wind loading, and structural failure probability can be increased with rain load participation, occurrence times and duration of storms.