背风墙面开孔的低矮房屋风致内压响应研究

风灾中原本封闭的结构被破坏后将变成开孔结构,结构内压突然增大,将会加剧对结构的破坏。当前对风致内压的研究主要关注结构迎风面开孔的情况,而忽略了背风墙面开孔时的内压响应。从理论上推导了背风墙面开孔结构风致内压响应的计算方法,依据同济大学浦东实测基地低矮房屋在台风作用下的实测数据,对比了实测和理论计算得到的内压体系自振频率和内压响应,验证了该计算方法的准确性。最后对背风墙面合理开孔面积进行研究,建立了一套能够改善屋盖在强风中受力的开孔方法,并验证了该方法对于调控屋盖所受合力具有显著的效果。

Wind-induced internal pressure response of low-rise buildings with leeward wall opening

In wind disasters, the closed structures will become open structures after being destroyed, and the internal pressure of the structures will suddenly increase, which has greater damages to the structures. At present, the researches on wind-induced internal pressure mainly focus on the structure with opening on windward wall, but ignore the situation of leeward wall with opening. Firstly, the calculation method of wind-induced response of structure with opening on leeward wall was deduced theoretically. Then the natural frequencies of the internal pressure system and the internal pressure responses obtained from the field measurement and the theoretical calculation method were compared to verify the accuracy of the theoretical method. After that, a rational method about the opening area on the leeward walls was explored and established, which was demonstrated to have obvious effects on improving the load conditions of roofs under strong wind.