螺纹钢筋疲劳性能测定方法研究-中国测试.PDF

第41卷第 10期 中国测试 Vol.41 No.10 2015年 10月 CHINA MEASUREMENT TEST October，2015 doi院10.11857/j.issn.1674-5124.2015.10.028 螺纹钢筋疲劳性能测定方法研究 岑 风袁 李 阳袁 张 珂袁 褚 峰 （江苏省沙钢钢铁研究院，江苏 张家港 215625） 摘 要院为解决英标B500B螺纹钢在疲劳试验过程中断裂在试验机夹具或在2d渊d为钢筋公称直径冤范围内而导致 试验失败的问题袁采用Abaqus软件模拟疲劳试验时夹持部分的受力分布并分析野断头冶产生的原因袁通过改变样品表 面状态尧夹持方式尧夹持力等方法分析影响疲劳试验的具体因素遥结果表明袁试样受力不均而导致局部应力集中是野断 头冶形成的主要原因遥 通过使用砂轮机打磨样品的横肋袁用砂布介质作为保护套和减少夹持力等方法袁可改善试样夹 持部位的应力集中情况袁有效避免野断头冶现象袁使得试验成功率得到极大程度提高遥 关键词院螺纹钢曰疲劳试验曰应力集中曰野断头冶现象 文献标志码院A 文章编号院1674-5124渊2015冤10-0125-04 Study on the test method for rebar fatigue performance CEN Feng，LI Yang，ZHANG Ke，CHU Feng （Institute of Research of Iron and Steel，Shasteel，Zhangjiagang 215625，China） Abstract: In order to solve the problem in crack location on fixtures or in 2d （d stands for diameter）for B500B rebar in fatigue test，Abaqus software was used to simulate the force distribution of clamping parts and the causes of end-breaking were researched by changing the sample surface condition，clamping method，clamping force，etc. The results show that the main reason for end-breaking is that the uneven stress of the samples causes local stress concentration. In order to enhance the test success chance to a large extent，the stress concentration of the clamping parts can be improved and the end-breaking can be effectively prevented by the following methods: using grinders to polish the transverse sample ribs，using abrasive band medium as protective jackets，and reducing the clamping force. Keywords: rebar；fatigue test；stress concentration；end-breaking 0 引 言