雷击框架结构建筑危险性分析  

Risk Analysis of Lighting Stroke on Frame Structure Building

作　　者：张云朋[1,2] 

机构地区：[1]化学品安全控制国家重点实验室,山东青岛266071 [2]中国石化安全工程研究院,山东青岛266071

出　　处：《安全、健康和环境》2016年第1期34-38,共5页Safety Health & Environment

摘　　要：利用两个框架结构模型开展了一系列模拟试验,研究了框架结构建筑遭受雷击时雷电流的分布情况。研究结果表明:雷电流的分布情况随雷击点位置的变化而变化,距离雷击点越近,雷电流越大,距离雷击点越远,雷电流越小;当增加引下线的数量时,雷电流分布的畸变情况更加严重,距离雷击点较远的引下线上的雷电流明显减小,距离雷击点较近的引下线上的雷电流有一定程度的减小;单纯增加引下线数量不能明显改善雷电流的分布情况。根据研究结果,指出了框架结构建筑在雷电防护方面应注意的问题。Based on two frame structure models, a se- ries of simulation experiments are carried out to study the distribution of lighting current when a fame struc- ture building is suffering from a lighting stroke. The result shows that： the distribution of the lighting cur- rent changes as the change of the location of the stro- king point, and the nearer to the stroking point, the larger the lighting current is, which is the same on the contrary; when we add the number of down leads, the distortion of the lighting current is more serious than before, and the ligi^ting current on the down lead which is far from the stroking point decl^a- ses much more than before and the lighting current on the down lead which is near to the stroking point de- creases to some extent ; only adding the number of tile down leads cant improve the distribution of the light- ing current. According to the result, some sugges- tions are made on the lighting protection of tk＇ame structure buildings.

关 键 词：雷击 框架结构 雷电流分布 雷电防护 

分 类 号：TQ086[化学工程]