基于反应谱法的玻璃钢烟囱的地震响应分析
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摘要
玻璃钢烟囱由于其良好的耐腐蚀性以及重量轻等特点而得到应用,但玻璃钢复合材料烟囱结构的分析并不多见,并且我们国家还没有设计规范。针对某工程应用的高60 m玻璃钢复合材料烟囱结构,应用振型分解反应谱法进行了地震响应分析,考虑了水平地震和竖向地震的联合作用,并且按照SRSS组合方法取前108阶振型进行了叠加,同时按照各向异性复合材料层合壳理论对玻璃钢烟囱进行了强度分析,应用Tsai-Wu强度比理论对烟囱结构进行了校核。
Due to their high corrosion and chemical resistance,glass fiber reinforced plastic(GFRP) materials are increasingly being used in the construction of industrial chimneys.However,the dynamic properties of such kind of high structure have been analyzed rarely.Otherwise,there are not design specifications in our country either.To ensure its safety,the seismic response and stress analysis of a 60 m high FRP chimney has been performed using ANSYS in this paper.The modeling is based on the modal response spectrum method,taking into account the combination of the horizontal earthquake and the vertical earthquake.In accordance with the SRSS method,the vibration modes from the 1-order to the 108-order are superimposed.Further,the stress is calculated using the anisotropic laminated shell theory.Results show that the strength of this FRP chimney agrees with Tsai-Wu theory.
Due to their high corrosion and chemical resistance,glass fiber reinforced plastic(GFRP) materials are increasingly being used in the construction of industrial chimneys.However,the dynamic properties of such kind of high structure have been analyzed rarely.Otherwise,there are not design specifications in our country either.To ensure its safety,the seismic response and stress analysis of a 60 m high FRP chimney has been performed using ANSYS in this paper.The modeling is based on the modal response spectrum method,taking into account the combination of the horizontal earthquake and the vertical earthquake.In accordance with the SRSS method,the vibration modes from the 1-order to the 108-order are superimposed.Further,the stress is calculated using the anisotropic laminated shell theory.Results show that the strength of this FRP chimney agrees with Tsai-Wu theory.
引文
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[3]沈观林.复合材料力学[M].北京:清华大学出版社,1996.
[4]Hull D,Clyne T W.An Introduction to Composite Materials[M].2nd Edition.[S.l.]:Cambridge University Press,1996.
[5]蔡洪良,杨薇.双管自立式钢结构烟囱设计简介[J].特种结构,2008(2):80-82.
[6]杨小兵,田树桐.燃煤电厂玻璃钢内筒套筒式烟囱设计[J].武汉大学学报:工学版,2007(S1):45-48.
[7]中华人民共和国建设部.GB50051—2002烟囱设计规范[S].北京:中国建筑工业出版社,2002.
[8]中华人民共和国建设部.GB50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[9]ANSI.ANSI/ASME RTP—1—2000 Reinforced Thermoset Plastic Corrosion Resistant Equipment[S].New York:[s.n.],2000.
[10]范立础.桥梁抗震[M].上海:同济大学出版社,1997.
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