摘要
文章分析了主建筑物周围其它高耸建(构)筑物对主建筑物雷击特点的影响,一方面,由于拦截闪电作用降低了主建筑物自身遭受直接雷击的次数,另一方向,雷电流泄流时产生的雷电电磁场改变了主建筑物内雷电电磁脉冲产生的频率。同时,文章确定了周围建(构)筑物对评估对象直接雷击以及雷电感应影响对应的需修正的雷电灾害风险评估参数为建筑物的年平均雷击次数ND及建筑物附近的年平均雷击次数NM,并通过实例分析,阐述了应用作图法科学确定参数的定量计算方法。
This paper analyzes the influence of high surrounding building structures on the lightning stroke characteristics. On the one hand, intercepting the lightning can reduce the times of direct lightning stroke to the buildings. On the other hand, the lightning electromagnetic field that caused by lightning current discharging alters the frequency of lightning electromagnetic pulse. At the same time,the lightning disaster risk assessment parameters are the annual average lightning strokes No and NM of the building structures and nearby buildings, which is corresponded by the influence of evaluation target on other surrounding structures. Through the analysis of examples, the quantitative evaluation methods by means of digraph are illustrated.
出处
《气象水文海洋仪器》
2015年第2期39-43,共5页
Meteorological,Hydrological and Marine Instruments
基金
2014河北省气象局科研项目大型化工园区雷电灾害风险区划及评估技术研究(14KY20)
关键词
周围建(构)筑物
雷电灾害风险评估
定量计算
surrounding building structures
lightning hazards assessment
quantitative calculation methods
