240m高钢筋混凝土烟囱有限元分析及加固
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摘要
以某240m高单筒式钢筋混凝土烟囱为例,通过ABAQUS建立模型,计算了自重荷载、风荷载、温度作用对烟囱的单独作用和组合作用效应。分析得知烟囱的顶点最大位移、承载能力均满足规范要求,烟囱裂缝除局部筒壁最大裂缝宽度不满足规范要求外,其余部分均满足要求。根据有限元计算结果,需对烟囱筒壁出现的损伤进行修复加固,以提高烟囱刚度以避免风振效应,消除烟囱使用过程中的安全隐患。
Taking an example of 240 meters high single tube reinforced concrete chimney,a model is established through the finite element analysis program ABAQUS to analyze the effect of gravity,wind and temperature which work respectively and simultaneously. The results show that the maximum displacement of the top of chimney,bearing capacity can meet the requirements of the specification. The maximum crack width of the chimney also meets the design specification except for the body of local chimney wall. According to the results of the finite element calculation,the chimney's damaged areas need repair and reinforcement to improve the rigidity,avoiding the wind vibration effect,and eliminate the potential safety hazard.
Taking an example of 240 meters high single tube reinforced concrete chimney,a model is established through the finite element analysis program ABAQUS to analyze the effect of gravity,wind and temperature which work respectively and simultaneously. The results show that the maximum displacement of the top of chimney,bearing capacity can meet the requirements of the specification. The maximum crack width of the chimney also meets the design specification except for the body of local chimney wall. According to the results of the finite element calculation,the chimney's damaged areas need repair and reinforcement to improve the rigidity,avoiding the wind vibration effect,and eliminate the potential safety hazard.
引文
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[2]龙海飚.烟囱结构选型及防腐材料的选择[J].湖南电力,2004(06):7-9.
[3]国家标准.建筑结构荷载规范GB50009-2012,中国建筑工业出版社
[4]国家标准.高耸结构设计规范GB50135-2006,北京:中国计划出版社.
[5]国家标准.烟囱设计规范GB50051-2013,中国计划出版社.
[6]杨翔东,何文跃,项益辉.钢筋混凝土烟囱加固设计及施工[J].工业建筑,2008(S1):998-1001.
[7]刁学优,许锴.某80m单筒式烟囱裂缝及盐酸腐蚀鉴定与分析[J].建筑结构,2008(6):89-92.
[8]杨晖柱,何天森,丁洁民,等.某烟囱改造工程的结构加固设计与分析[J].特种结构,2008(02):87-89+92.
[9]潘宇,于强.单筒式钢筋混凝土烟囱的非线性屈曲分析[J].特种结构,2010(5):59-61.
[10]王泽军,陈乐育.砖烟囱开裂原因分析及其对策[J].工程抗震与加固改造,2007,(04):93-95.
[11]温德超,刘季林,王清刚.80m高钢烟囱的风振分析[J].工程抗震,2004,(01):26-29.
[12]颜伟华,王庆海,陈玲,等.某钢筋混凝土套筒式烟囱外筒的受力分析与结构设计[J].特种结构,2015,(01):114-117+6.
[13]伍喜华,陈平.某砖烟囱的安全性鉴定加固及有限元分析[J].工业建筑,2011,(S1):813-816+854.
[14]何天森,巢斯,时素红.高耸结构静力弹塑性分析研究[J].结构工程师,2011,(02):45-50.