| 圆管-方管混凝土T型节点疲劳性能试验研究 |
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| 引用本文： | 童乐为 杨德磊,ZHAO Xiaolin.圆管-方管混凝土T型节点疲劳性能试验研究[J].振动与冲击,2013,32(3):99-105. |
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| 作者姓名： | 童乐为 杨德磊 ZHAO Xiaolin |
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| 作者单位： | 1. 同济大学建筑工程系，上海 200092； 2. 黄淮学院建筑工程系，河南 驻马店 463000；3. Department of Civil Engineering, Monash University, Clayton, VIC 3800, Australia |
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| 摘 要： | 基于热点应力法的管节点疲劳性能研究思路中，热点应力集中系数和疲劳寿命是描述焊接管结构节点疲劳性能的两个主要方面。对8个支管为圆管主管为内填充C50等级混凝土的方管节点试件（CT1～CT8）进行热点应力试验以确定其热点应力集中系数（SCF），在此基础上进行疲劳试验以确定其疲劳寿命（N3），并将试验结果与具有相同几何尺寸和受力条件的圆管-方管节点试验结果以及相关规范进行比较分析。研究表明，支管受轴向荷载下，圆管-方管混凝土节点较对应空钢管节点而言，节点区刚度分布有明显改善，前者SCF最大值均小于后者SCF最大值，具有更好的疲劳性能；已有规范中关于空钢管节点疲劳性能的S-N曲线不适用于进行圆管-方管混凝土T型节点的疲劳性能分析。
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| 关 键 词： | 钢管混凝土节点 热点应力集中系数 疲劳寿命 疲劳试验 疲劳性能 |
| 收稿时间： | 2012-5-2 |
| 修稿时间： | 2012-9-25 |
Experimental Study on Fatigue Behaviour of Welded CHS-to-Concrete Filled SHS T-joints |
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| TONG Le-wei,YANG De-lei,ZHAO Xiao-lin.Experimental Study on Fatigue Behaviour of Welded CHS-to-Concrete Filled SHS T-joints[J].Journal of Vibration and Shock,2013,32(3):99-105. |
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| Authors: | TONG Le-wei YANG De-lei ZHAO Xiao-lin |
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| Affiliation: | 1. Department of Building Engineering, Tongji University, Shanghai, 200092, China；2.Department of Building Engineering, Huanghuai University, Zhumadian, 463000, China；3. Department of Civil Engineering, Monash University, Clayton, VIC 3800, Australia |
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| Abstract: | Stress concentration factors(SCF) and fatigue life are two main aspects of studying fatigue behavior of tubular joints based on hot spot stress method. The eight welded composite tubular T-joints were tested under static loading to determine stress concentration factors at hot spot locations and were also tested under cyclic loading to obtain fatigue life data. compared with joints made of circular hollow section to square hollow section (CHS-SHS) T-joints, The test results indicate that the circular hollow section to concrete-filled square hollow section (CHS-CFSHS) T-joints exhibit evident improvements in rigidity distribution and better fatigue performance.compared with relevant codes, The test results indicate that S-N curves on hollow section tubes in relevant codes are not suitable for fatigue performance analyzing of CHS-CFSHS T-joints. |
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| Keywords: | concrete-filled tubular joints stress concentration factors fatigue life fatigue test fatigue behaviour |
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