俞登科, 李正良, 韩枫, et al. Reliability Analysis on Ultra-high Voltage Transmission Tower under Wind based on Performance[J]. 2013, 33(6): 657-662. DOI: 10.13409/j.cnki.jdpme.2013.06.007.
基于性能目标的特高压输电塔抗风可靠度分析
摘要
特高压输电塔作为风敏感结构
在不同风荷载强度等级作用下
会遭受不同程度的损伤和破坏甚至倒塌。除了关注倒塌这一严重破坏
对于特高压输电塔在运营期间不同的受损程度
即不同的性能水准和表现也应重视
并采取相应的加固维修措施。通过大量调研和分析
提出以应力比和顶点位移为控制标准的性能目标
并建立了其性能水准量化模型;进而结合自适应高次响应面法
对皖电东送—上海1000kV双回路输电线路中的SZ301直线塔进行了相应的抗风静力性能可靠度分析
从而验证了所建议性能水准框架及可靠度分析方法的可行性
对工程设计和实践具有一定的指导意义。
Abstract
As sensitive structures
ultra-high voltage transmission towers will be damaged in different degree or even collapse under wind load with different strength grade.In addition to the collapse of these towers
their performance should also be concerned and appropriate reinforcement and repair strategy should be taken.A quantitative model of performance standards is established in this paper through a lot of research and analysis.This model takes stress ratio and vertex displacement as the targets of control standard.Then the wind-resistant performance reliability of the straight line tower named SZ301
which is selected from 1000kV double circuit transmission line between Anhui and Shanghai is analyzed by using the proposed high-order adaptive response surface method.The numerical example indicates that the proposed performance standard framework and the corresponding reliability analysis method are feasible and be significative to the engineering design and practice.
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