一次强雷击空气冲击波引发灾害过程分析

对2010年9月13日发生在浙江省义乌城区附近室内隔墙倒塌事件,从雷暴和雷电强度、空气冲击波原理、隔墙墙体的牢固度等方面进行详细分析.结果表明室内的隔墙未作有效加固处理,是隔墙倒塌的内因；当天的10级大风所产生的风压,对隔墙倒塌具有一定影响,但雷暴云团强度强,雷电的负闪电流强度达到416.798 kA,远远超过一般雷灾强度100～200 kA的值,在近距离的雷电放电造成的空气冲击波,对隔墙倒塌具有引发作用是主要因素.

A Case Study of a Disastrous Lightning Stroke Event Caused by Air Shock Wave

A case study is conducted on the lightning induced interior wall collapse event on 13 September 2010 in Yiwu, Zhejiang Province. The intensity of lightning, the waveform of air shock waves, and the solidity of partition walls are analyzed in detail. The results indicate that being lack of certain anti vibration capacity for there was no any wall reinforcement measure is the internal cause; the wind pressure induced by the strong wind (force 10) on that day had a certain impact; the main cause is the strong lightning, which had a negative current intensity of 416.798 kA, far greater than the general disaster strength of 100 to 200 kA; the air shock wave from lightning discharges at short range made wall collapsed.