|本期目录/Table of Contents|

[1]刘 晖,查启斌,王雪亮.武汉体育中心游泳馆屋顶网架结构风致疲劳性能分析[J].建筑科学与工程学报,2018,35(06):50-56.
　LIU Hui,ZHA Qi-bin,WANG Xue-liang.Wind-induced Fatigue Performance Analysis of Roof Gird Structure of Natatorium in Wuhan Sports Center[J].Journal of Architecture and Civil Engineering,2018,35(06):50-56.
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武汉体育中心游泳馆屋顶网架结构风致疲劳性能分析(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
35卷
期数:
2018年06期
页码:
50-56
栏目:
出版日期:
2018-11-22

文章信息/Info

Title:
Wind-induced Fatigue Performance Analysis of Roof Gird Structure of Natatorium in Wuhan Sports Center
作者:
刘 晖，查启斌，王雪亮
武汉理工大学道路桥梁与结构工程湖北省重点实验室
Author(s):
LIU Hui, ZHA Qi-bin, WANG Xue-liang
Hubei Key Laboratory of Roadway Bridge & Structure Engineering, Wuhan University of Technology
关键词:
网架结构; 风致疲劳; 刚度降低; 疲劳性能; Miner损伤准则
Keywords:
gird structure;  wind-induced fatigue;  stiffness reduced;  fatigue performance;  Miner damage criteria
分类号:
-
DOI:
-
文献标志码:
A
摘要:
以武汉体育中心游泳馆屋顶网架结构为研究对象，分析其在随机风荷载作用下的疲劳损伤性能。先根据该结构风洞试验结果结合数值模拟得到作用在结构上的风荷载，再利用ANSYS对结构进行应变时程分析，通过雨流计数法进行应变循环历程统计，最后基于Miner损伤准则计算总累加损伤和估算疲劳寿命。据此编制了适用于网架结构疲劳分析的程序，可计算出所有杆件在不同工况下的风致疲劳损伤值和疲劳寿命。为了研究结构在损伤情况下的疲劳性能，分析获得了不同风向角下的易损杆件，假设这些杆件首先发生刚度降低，来分析结构完好、有损伤结构在设计风速和良态风速下的疲劳性能。结果表明：在设计风速下结构完好时，有杆件会发生疲劳损伤或破坏；随着结构刚度降低，发生疲劳损伤和破坏的杆件数量大幅增加；即使是在良态风速下，随着结构刚度降低，在100年建筑使用寿命内也出现了杆件疲劳损伤和破坏；对网架结构来说，特别是当结构有损伤服役时，风致疲劳是结构巨大安全隐患，应引起高度重视。
Abstract:
Taking the roof gird structure of the natatorium in Wuhan Sports Center as the study object, the fatigue performance under random wind load was analyzed. Firstly, based on the wind tunnel test results and the numerical simulation, the wind load acted on structure was obtained, then the strain time history was analyzed by ANSYS. The strain cycles history was counted by rain-flow counting algorithms. Finally, the total cumulative damage and fatigue life of members were calculated based on Miner damage criteria. A program was worked out to calculate the wind-induced fatigue damage and fatigue life of all members of gird structure under different conditions. In order to study the fatigue performance of the damaged structure, the vulnerable members under different wind directions were found. The stiffnesses of members were assumed to decrease firstly the fatigue performance of the undamaged and damaged structure under the design wind speed and normal wind speed were analyzed. The results indicate that there are members with fatigue damage occurrence when undamaged structure under design wind load. As the structural stiffness decreases, the number of fatigue damage members increases considerably. Even in the normal wind speed, with the structural stiffness reduces, there are fatigue damage members occurrence within the 100 years of the service life. Therefore, for the gird structure, especially when the structure works with damage, wind-induced fatigue is a huge security hazard to the structure, and should be paid more attention.

参考文献/References:

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备注/Memo

备注/Memo:
更新日期/Last Update: 2018-11-22