疲劳荷载作用下栓钉连接件的抗剪承载力退化规律

发布时间：2018-01-13 07:49

本文关键词：疲劳荷载作用下栓钉连接件的抗剪承载力退化规律　出处：《哈尔滨工业大学学报》2016年09期 　论文类型：期刊论文

【摘要】：为了解钢-混凝土组合结构中栓钉连接件在疲劳荷载后的力学特性,针对栓钉推出试件进行静载破坏试验、完全疲劳试验以及非完全疲劳破坏试验.在此基础上归纳了已有栓钉连接件的非完全疲劳破坏的相关试验数据,将疲劳循环次数和剩余抗剪承载力这两个参数作归一化处理,使得所有试验数据具备可比性;同时基于剩余强度理论,推导出适用于栓钉连接件的剩余承载力计算模型,并通过试验数据拟合确定其参数;最后通过若干文献的试验数据进行验证分析.结果表明:在疲劳荷载作用下,栓钉连接件的剩余承载能力呈现先慢后快的非线性退化趋势.所提出的栓钉连接件承载力幂指数退化模型可以较好地描述栓钉连接件的剩余承载力随疲劳循环次数的变化规律.
[Abstract]:In order to understand the mechanical properties of stud joints in steel-concrete composite structures after fatigue loading, static load failure tests were carried out for the stud push-out specimens. Based on the complete fatigue test and incomplete fatigue failure test, the related test data of incomplete fatigue failure of existing pin connections are summarized. The fatigue cycle number and the residual shear capacity are normalized to make all the test data comparable. At the same time, based on the residual strength theory, the calculation model of residual bearing capacity is deduced, and the parameters are determined by fitting the test data. Finally, the test data of some literatures are used to verify and analyze. The results show that: under the action of fatigue load. The residual load-bearing capacity of the stud joint shows a tendency of nonlinear degradation, which is slow first and then fast. The proposed exponential degeneracy model of the bearing capacity of the stud joint can better describe the residual bearing capacity of the stud joint with fatigue cycle times. The law of change of number.
【作者单位】：东南大学交通学院;
【基金】：国家自然科学基金(51278119)
【分类号】：TU398.9
【正文快照】： 栓钉抗剪连接件是目前在钢-混凝土组合桥梁中应用最为广泛的抗剪连接件.在实际受力过程中,栓钉抗剪连接件是保证钢梁与混凝土桥面板共同工作,并发挥“1+12”组合作用的关键[1],结合面上的所有剪力完全由其承担.在车辆等反复荷载作用下,栓钉连接件会处于较高的疲劳应力状态,因

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