[1]赵 海1,白国良1,徐亚洲1,等.初始缺陷对超大型双曲冷却塔极限承载力的影响[J].西安建筑科技大学学报:自然版,2011,43(06):777-783.[doi:DOI:10.15986/j.1006-7930.2011.06.014]
 ,,et al.The influence of initial imperfections on the ultimate bearingcapacity of super-large hyperbolic cooling towers[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2011,43(06):777-783.[doi:DOI:10.15986/j.1006-7930.2011.06.014]
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初始缺陷对超大型双曲冷却塔极限承载力的影响()
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西安建筑科技大学学报:自然版[ISSN:1006-7930/CN:61-1295/TU]

卷:
43
期数:
2011年06期
页码:
777-783
栏目:
出版日期:
2011-12-31

文章信息/Info

Title:
The influence of initial imperfections on the ultimate bearing
capacity of super-large hyperbolic cooling towers
文章编号:
1006-7930(2011)06-0777-07
作者:
赵 海1白国良1徐亚洲1姚友成2杜吉克2
(1.西安建筑科技大学土木工程学院,陕西西安710055;
2.中国电力工程顾问集团西北电力设计院,陕西西安710075)
Author(s):
ZHAO Hai1BAI Guo-liang1XU Ya-zhou1YAO You-cheng2DU Ji-ke2
(1.Xi′an University of Architecture and Technology,Xi′an 710055,China;
2.Northwest Electric Power Design Institute,Xi′an,710075,China
关键词:
弧长法初始缺陷屈曲模态双曲冷却塔材料非线性模态贡献系数
Keywords:
arc-length methodinitial imperfectionsbuckling modeshyperbolic cooling towersmaterial nonlinearitymodal contribution coefficients.
分类号:
TU33+2
DOI:
DOI:10.15986/j.1006-7930.2011.06.014
文献标志码:
A
摘要:
施工误差、材料性能不均匀等不可控制因素必然导致冷却塔结构具有一定的初始缺陷,本文主要研
究了初始缺陷对冷却塔结构弹塑极限承载力的影响.通过弹性屈曲分析和自振特性分析,获得冷却塔结构的
屈曲模态及振型,进而将结构初始缺陷视为由模态贡献系数调制的确定性函数(正交模态)的线性组合形式,
在考虑材料非线性的前提下,采用修正的弧长法分析结构的弹塑性极限承载力.算例结果表明:冷却塔对振
型初始缺陷构形较屈曲模态缺陷构型更为敏感,该方法可以有效地寻求结构初始缺陷的最不利分布形式,适
用于大型工程结构的初始缺陷分析.
Abstract:
The uncontrollable factors such as construction error,material inhomogeneity,etc.will inevitably lead to a certain
 initial imperfection.This paper mainly studies the initial defects of the cooling tower structure in the elastic-plastic
stage influencing on the ultimate bearing capacity.Through elastic buckling analysis and the self-vibration characteristics
of analysis,the buckling modes and the vibration modes multiplied by the modal contribution coefficients are introduced
into the structure as the initial defects of hyperbolic cooling towers,taking into account the nonlinear material under the
premise of the modified arc-length method in order to amend the elastoplastic ultimate bearing capacity of the structure.In
the end,the numerical results show that:the super-large hyperbolic cooling tower with vibration mode initial imperfections
 is more sensitive than with buckling mode initial imperfections.The method can efficiently facilitate the search for
the most unfavorable initial imperfection distribution form,so it can be applied to large-scale engineering structure initial
imperfection analysis.
Key words:arc-length method;

参考文献/References:

References
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备注/Memo

备注/Memo:
收稿日期:2011-02-28  修改稿日期:2011-10-15
基金项目:国家自然科学基金资助项目(50778150,50978216);高等教育博士学科点专项科研基金资助项目(20096120110003);陕
西省科技计划国际合作项目(2008KW-13);陕西省工业攻关项目(2006K07-G24)
作者简介:赵 海(1982-),男,河北石家庄人,博士研究生,主要从事随机场理论与结构动力可靠度方向的研究.
更新日期/Last Update: 2015-11-06