Design wind loads on hyperbolic cooling towers during construction

ZHANG Ming; WANG Fei; LI Qingbin; TANG Dongsheng

doi:10.16511/j.cnki.qhdxxb.2015.24.003

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Journal of Tsinghua University(Science and Technology) ›› 2015, Vol. 55 ›› Issue (12) : 1281-1288. DOI: 10.16511/j.cnki.qhdxxb.2015.24.003

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Design wind loads on hyperbolic cooling towers during construction

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Abstract

The fundamental theory of structural reliability was used to predict the design wind load on hyperbolic cooling towers during construction to give the same reliability during construction as for the design reference period. The relationships between the reliability for the design reference period for various time intervals and the reliability during construction for various time intervals are given based on the time interval method for analyzing the structural reliability using the stationary binomial stochastic process model for wind loads. The structural resistance during construction is found to be proportional to that of the design reference period. The characteristic wind loads also preserve the proportionality relation with the wind load factor during construction defined in this paper using partial safety factor design expressions for these two periods. A general wind load factor solution procedure was given and the predicted wind load factors were computed for typical probabilistic distributions of the random variables. The wind load factor increases with the extension of the construction cycle or with a lower resistance partial safety factor. The relationship between the wind load factor and the construction time is well fit by a logarithmic function. The design wind load for hyperbolic cooling towers during construction can be determined with the correlations or simplified tables of the wind load factor.

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structural reliability / hyperbolic cooling tower / construction period / design wind load / characteristic value of wind load / partial safety factor design

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ZHANG Ming, WANG Fei, LI Qingbin, TANG Dongsheng. Design wind loads on hyperbolic cooling towers during construction[J]. Journal of Tsinghua University(Science and Technology). 2015, 55(12): 1281-1288 https://doi.org/10.16511/j.cnki.qhdxxb.2015.24.003

References

[1] Mungan I, Wittek U. Natural Draught Cooling Towers [C]// Proceedings of the Fifth International Symposium on Natural Draught Cooling Towers. Rotterdam, The Netherlands: A A Balkema Publishers, 2004.
[2] ZHAO Lin, GE Yaojun. Wind loading characteristics of super-large cooling towers [J]. Wind and Structures, An International Journal, 2010, 13(3): 257-273.
[3] Orlando M. Wind-induced interference effects on two adjacent cooling towers [J]. Engineering Structures, 2001, 23(8): 979-992.
[4] Sabbagh-Yazdi S R, Torbati M, Azad F M,et al.Computer simulation of changes in the wind pressure due to cooling towers-buildings interference [J]. WSEAS Transactions on Mathematics, 2007, 6(1):205-214.
[5] Blazik-Borowa E. Computational fluid dynamic simulation of the pressure distribution on the natural draught cooling tower shell [J]. Archives of Civil Engineering, 2007, 53(2): 225-241.
[6] Zahlten W, Borri C.Time-domain simulation of the non-linear response of cooling tower shells subjected to stochastic wind loading [J]. Engineering Structures, 1998, 20(10): 881-889.
[7] 廖汶, 卢文达, 刘人怀. 双曲冷却塔结构非线性有限元可靠度分析 [J]. 工程力学, 1999, 16(1):49-55. LIAO Wen, LU Wenda, LIU Renhuai. Finite element reliability analysis of hyperbolic cooling towers [J]. Engineering Mechanics, 1999, 16(1): 49-55.(in Chinese)
[8] 李国强, 黄宏伟, 吴讯, 等. 工程结构荷载与可靠度设计原理 [M]. 第2版. 北京: 中国建筑工业出版社, 2008.LI Guoqiang, HUANG Hongwei, WU Xun, et al. Engineering Structural Loads and Reliability Design Principle [M]. 2nd Ed. Beijing: China Architecture & Building Press, 2008. (in Chinese)
[9] 张明. 结构可靠度分析: 方法与程序 [M]. 北京: 科学出版社, 2009. ZHANG Ming. Structural Reliability Analysis: Methods and Procedures [M]. Beijing: Science Press, 2009.(in Chinese)
[10] 卢红前. 大型双曲线冷却塔施工期风筒强度及局部稳定验算 [J]. 武汉大学学报: 工学版, 2007, 40(增): 414-419.LU Hongqian. Analysis of tower wall strength and local stability of alarge hyperbolic cooling tower during construction [J]. Engineering Journal of Wuhan University, 2007, 40(S): 414-419.(in Chinese)
[11] GB50068-2001. 建筑结构可靠度设计统一标准 [S]. 北京: 中华人民共和国建设部, 2001.GB50068-2001. Unified Standard for Reliability Design of Building Structures [S]. Beijing: Ministry of Housing and Urban-Rural Development of People's Republic of China. (in Chinese)
[12] GB50009-2012. 建筑结构荷载规范 [S]. 北京: 中华人民共和国住房与城乡建设部, 2012.GB50009-2012. Load Code for the Design of Building Structures [S]. Beijing: Ministry of Housing and Urban- Rural Development of People's Republic of China. (in Chinese)
[13] GB/T50102-2014. 工业循环水冷却设计规范 [S]. 北京: 中华人民共和国住房与城乡建设部, 2014.GB/T50102-2014.Code for Design of Cooling for Industrial Recirculating Water [S]. Beijing: Ministry of Housing and Urban-Rural Development of People's Republic of China.(in Chinese)
[14] 姚继涛. 结构可靠度的时段分析法 [J]. 土木工程学报, 2005, 38(7): 1-5.YAO Jitao. Time-interval method for analyzing structural reliability [J]. China Civil Engineering Journal, 2005, 38(7): 1-5.(in Chinese)
[15] 胡德炘. 建筑结构概率极限状态设计法 [J]. 建筑科学, 1986 (2): 20-28.HU Dexin. The probability-based limit state design method for building structures [J]. Building Science, 1986 (2): 20-28. (in Chinese)