CAJ | 학술논문

中国时有输电线路的风灾破坏事故发生。作为一种典型的风振敏感结构，作用于杆塔结构上的输电线风荷载往往是线路设计中的控制荷载。从结构风工程原理出发，对中英美三国典型线路风荷载规范的理论基础、计算方法及取值原则做深入解析和比较，全面考察基本风速、风剖面、紊流度、空间相关性、随机脉动效应、档距及高度等因素对输电线风荷载计算的影响，逐步揭示了规范荷载差异的实质原因及分布规律。结合工程实例的计算比较，提出了在中国规范中优化平均风荷载计算参数，合理考虑风荷载空间相关性和紊流特性等主要脉动风动力效应因素的建议，为提高线路抗风设计的可靠性以及规范修订提供了一些客观参考。
중국시유수전선로적풍재파배사고발생。작위일충전형적풍진민감결구，작용우간탑결구상적수전선풍하재왕왕시선로설계중적공제하재。종결구풍공정원리출발，대중영미삼국전형선로풍하재규범적이론기출、계산방법급취치원칙주심입해석화비교，전면고찰기본풍속、풍부면、문류도、공간상관성、수궤맥동효응、당거급고도등인소대수전선풍하재계산적영향，축보게시료규범하재차이적실질원인급분포규률。결합공정실례적계산비교，제출료재중국규범중우화평균풍하재계산삼수，합리고필풍하재공간상관성화문류특성등주요맥동풍동력효응인소적건의，위제고선로항풍설계적가고성이급규범수정제공료일사객관삼고。
Damage and failure of transmission lines due to windstorm disaster have occurred accidentally in China in recent years. As a typical wind-sensitive structure, the wind load on long span lines is the controlling load case in transmission tower structure design. In this paper, based on wind engineering theories, considering the main influence of load factors, such as basic wind speed, wind profile, turbulence intensity, spatial correlation, turbulent dynamic effect, span and height of lines etc., the background methods and principles of the wind load calculation in China, America and British codes were investigated and compared comprehensively. Then, the distribution low of the differences between these design codes were revealed and discussed gradually. Furthermore, combined with the wind load calculation of a real engineering example follow these three codes, the suggestions about considering dynamic influence by the turbulence stochastic characteristics along the line span on the future revise of Chinese wind load codes were provided. The paper supplies some objective opinions for the specification revision. The conclusions and suggestions will benefit for codes revision and improve the reliability of wind resistance design for transmission system significantly.