[1]叶继红,申会谦.风荷载下空间网格结构疲劳性能[J].东南大学学报(自然科学版),2016,46(4):842-847.[doi:10.3969/j.issn.1001-0505.2016.04.028]
 Ye Jihong,Shen Huiqian.Fatigue performance of spatial latticed structures under wind loads[J].Journal of Southeast University (Natural Science Edition),2016,46(4):842-847.[doi:10.3969/j.issn.1001-0505.2016.04.028]
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风荷载下空间网格结构疲劳性能()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
46
期数:
2016年第4期
页码:
842-847
栏目:
土木工程
出版日期:
2016-07-20

文章信息/Info

Title:
Fatigue performance of spatial latticed structures under wind loads
作者:
叶继红申会谦
东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096
Author(s):
Ye Jihong Shen Huiqian
Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
空间网格结构 风荷载 多尺度模型 热点应力法 疲劳分析
Keywords:
spatial latticed structure wind load multi-scale model hot spot stress method fatigue analysis
分类号:
TU391
DOI:
10.3969/j.issn.1001-0505.2016.04.028
摘要:
依据课题组风洞试验测得的风压时程数据,采用梁单元整体模型与壳单元局部模型相结合的方式,对风致振动响应时程进行了分析;基于热点应力法,运用雨流计数法统计了焊接球节点焊趾处热点应力循环历程;根据挪威船级社规范提供的S-N曲线,结合Miner疲劳线性累积损伤理论,计算出空间网格结构构件的疲劳损伤值.计算结果表明,对于小曲率球壳结构,结构中最先出现疲劳损伤的构件位于平均正风压与脉动风压均最大的球壳迎风面;结构中疲劳构件的疲劳损伤值随平均正风压、脉动风压的增大而增大;相同工况下,采用热点应力法对构件进行的疲劳估计相比于名义应力法更偏于安全.
Abstract:
Based on the previous wind tunnel tests, a time-history analysis on the wind-induced vibration response of spatial latticed structure was performed by integrating the beam element model of spatial latticed structure and the shell element model of the joints. The cycle process of the hot spot stress at the weld toes of welding ball joints are obtained by a rain-flow counting method. The fatigue damage of each member on the spatial latticed structure was calculated based on the S-N curve provided by the Det Norske Veritas Recommended Practices and Miner’s Rule. The results show that the fatigue member first appears on the upwind surface of the dome with small rise-span ratio in which the fluctuating wind pressure and the average positive wind pressure reach the maximum values simultaneously; the damage values of fatigue members increase with the increase of the average positive wind pressure and the fluctuating wind pressure. In addition, the fatigue damage predicted by the hot spot stress method is found to be more conservative than that from the nominal stress method under the same working conditions.

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备注/Memo

备注/Memo:
收稿日期: 2015-06-29.
作者简介: 叶继红(1967—),女,博士,教授,博士生导师,yejihong@seu.edu.cn.
基金项目: 国家杰出青年科学基金资助项目(51125031).
引用本文: 叶继红,申会谦.风荷载下空间网格结构疲劳性能[J].东南大学学报(自然科学版),2016,46(4):842-847. DOI:10.3969/j.issn.1001-0505.2016.04.028.
更新日期/Last Update: 2016-07-20