钢筋混凝土烟囱温度应力计算方法
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摘要
在钢筋混凝土烟囱筒身使用阶段的应力计算中,必须考虑温度应力。通过对GB 50051—2002《烟囱设计规范》(下称"规范")[1]关于使用阶段迎风侧竖向钢筋拉应力的数值分析与理论研究发现,在温度与外荷载(自重与风荷载)共同作用的情况下,规范的迎风侧钢筋拉应力计算公式存在不连续,为此,分析了造成不连续的原因,并且提出了改进的应力计算方法。
For the stress calculation of a reinforced concrete chimney under serviceability limit state,thermal stress must be considered.Based on the "Code for Design of Chimneys"(GB 50051—2002)[1] chereafter referred to as "standard"),it was found by the numerical analysis and theoretic study on vertical reinforcement tensile stress on windward side during service that under co-action of temperature and load(weight and wind load),there was a discontinuity in the tensile stress calculation formula in the code,therefore,the causes for the discontinuity were analyzed,and a modified calculation method of temperature stress was also proposed.
For the stress calculation of a reinforced concrete chimney under serviceability limit state,thermal stress must be considered.Based on the "Code for Design of Chimneys"(GB 50051—2002)[1] chereafter referred to as "standard"),it was found by the numerical analysis and theoretic study on vertical reinforcement tensile stress on windward side during service that under co-action of temperature and load(weight and wind load),there was a discontinuity in the tensile stress calculation formula in the code,therefore,the causes for the discontinuity were analyzed,and a modified calculation method of temperature stress was also proposed.
引文
[1]GB50051—2002烟囱设计规范[S].
[2]刘志鸿.特种结构[M].北京:冶金工业出版社,1984:128.
[3]方雪兰.钢筋混凝土烟囱温度应力简捷计算法[J].西安冶金建筑学院学报,1984,38(2):29-48.
[4]王秀逸,张平生.特种结构[M].北京:地震出版社,1997:198.
[5]朱彦鹏.特种结构[M].武汉:武汉工业大学出版社,2004:156.
[6]李传才.特种结构[M].北京:中国电力出版社,1998:178.
[2]刘志鸿.特种结构[M].北京:冶金工业出版社,1984:128.
[3]方雪兰.钢筋混凝土烟囱温度应力简捷计算法[J].西安冶金建筑学院学报,1984,38(2):29-48.
[4]王秀逸,张平生.特种结构[M].北京:地震出版社,1997:198.
[5]朱彦鹏.特种结构[M].武汉:武汉工业大学出版社,2004:156.
[6]李传才.特种结构[M].北京:中国电力出版社,1998:178.
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