| 基于断裂力学的组合梁栓钉疲劳性能 |
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| 引用本文： | 王宇航,聂建国.基于断裂力学的组合梁栓钉疲劳性能[J].清华大学学报(自然科学版),2009(9). |
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| 作者姓名： | 王宇航 聂建国 |
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| 作者单位： | 清华大学土木工程系结构与振动教育部重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(50578084) |
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| 摘 要： | 为研究钢-混凝土组合梁中的栓钉在疲劳荷载作用下的强度及寿命等问题,在有限元静力分析的基础上,根据断裂力学的基本原理,采用合理的假设,推导出了组合梁栓钉的疲劳寿命计算公式。分析结果表明:初始缺陷和应力幅对栓钉的疲劳寿命影响最大,应力上限对栓钉疲劳寿命的影响较小。建议在实际工程中栓钉的应力幅控制在极限抗剪强度的20%以下,应力上限控制在极限抗剪强度的70%以下。
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| 关 键 词： | 钢-混凝土组合梁 栓钉 疲劳 断裂力学 |
Fatigue behavior of studs in a composite beam based on fracture mechanics |
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| WANG Yuhang,NIE Jianguo.Fatigue behavior of studs in a composite beam based on fracture mechanics[J].Journal of Tsinghua University(Science and Technology),2009(9). |
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| Authors: | WANG Yuhang NIE Jianguo |
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| Institution: | Key Laboratory of Structural Engineering and Vibration of Ministry of Education;Department of Civil Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | The fatigue behavior of studs in composite steel-concrete beams was analyzed using a static finite element analysis and fracture mechanics principles to calculate the studs fatigue life in composite steel-concrete beams.The results compare well with fatigue experiments on studs.The results show that the stress range and the maximum stress have the greatest effects on the studs fatigue life.A parametric analysis shows that the stresses in the studs should be less than 20% of the ultimate static strength of t... |
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| Keywords: | composite steel-concrete beam stud fatigue fracture mechanics |
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