钢筋混凝土烟囱拆除切口中脊高度的计算Calculation on Demolition Cut Height of Reinforced Concrete Chimney
曹启坤,侯丽娜
摘要(Abstract)：
拆除钢筋混凝土烟囱时,拆除切口中脊高度的合理选择是拆除成功的重要因素。根据钢筋混凝土烟囱在倒塌至拆除切口闭合时,倾覆力矩大于薄弱面的抵抗力矩的原则来确定钢筋混凝土烟囱定向倒塌的条件及拆除切口中脊高度对其定向倒塌的影响。在考虑烟囱是变截面筒体的情况下,通过对上述条件的分析,得到拆除切口中脊高度的计算公式,与烟囱的结构尺寸、拆除切口薄弱面位置、拆除切口所对圆心角、余留支撑体轴筋承受的拉力有关,不仅仅与烟囱的壁厚有关,与传统的经验公式是有较大差别的。
关键词(KeyWords)： 钢筋混凝土烟囱;拆除切口中脊高度;计算公式;定向倒塌;拆除
基金项目(Foundation):
作者(Author): 曹启坤,侯丽娜
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