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砖烟囱在地震后的破坏率高,较其他建筑物的破坏更普遍,也更严重。破坏程度一般随地震烈度的增大而加剧,破坏情况亦受震区场地土等级的影响。 从震害的细部来看:除掉头、倒塌等情况外,尚有水平裂缝,斜向裂缝、×裂缝、竖向裂缝、酥裂、扭转、局部塌落、水平错动等形式。但其中以水平裂缝为最多。并且水平裂缝往往发生在变断面处见资料(1)。掉头和倒塌物距离烟囱很近,倒在烟囱的一侧或周围均有。为此,本文针对水平裂缝进行一些分析和讨论。
The brick chimney has a high destruction rate after the earthquake and is more common and more serious than other buildings. The damage degree generally increases with the increase of seismic intensity, and the damage is also affected by the site soil level in the earthquake area. Judging from the details of the earthquake damage, apart from turning heads and collapsing, there are horizontal cracks, oblique cracks, x cracks, vertical cracks, cracks, twists, partial collapses, and horizontal displacements. However, horizontal cracks are the most common. And horizontal cracks are often seen at the variable section (1). The U-turns and the topples are very close to the chimney and fall on one side or around the chimney. For this reason, this article carries on some analysis and discussion to the horizontal crack.