雷击风险评估中的位置因子Cd的探讨

从周边建筑物对所考虑建筑物的扩大宽度影响的角度,分析了周边有等高、更低或更高的其他建筑物3种情况下,周边建筑物对所考虑的建筑物截收面积的实际影响.在此基础上提出了周边建筑物的高度、相对位置、环绕程度等均对建筑物截收面积有较大影响,并不能将其乘以一个恒定的位置因子作为考虑了周边建筑物的影响,应根据建筑物所处环境的实际情况的不同做更为精确的计算,以提高风险评估的准确性.

Discussion on the location factor in lightning risk assessment

From the viewpoint of the surrounding building''s impact on calculated building''s expanded width,the influence of the surrounding building on the equivalent area was analyzed under three cases:the surrounding buildings of the same height,higher or lower than the calculated building.Then it is concluded that the height,the relative location and surrounding degree of the surrounding building have a great influence on the equivalent area of a building,which can not be simply expressed by a constant location factor in the calculation of equivalent area considering the influence of the surrounding building.More precise calculations should be done according to the actual situation to improve the accuracy of the lightning risk assessment.