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首页> 外文期刊>Bulletin of earthquake engineering >Estimation of the cyclic capacity of beam-to-column dowel connections in precast industrial buildings
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Estimation of the cyclic capacity of beam-to-column dowel connections in precast industrial buildings

机译：预制工业建筑中梁柱销连接的循环承载力估算

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摘要

The behaviour of precast systems depends on the performance of the specific connections between the precast elements. In European precast design practice, the most common type of connection between beams and columns is a dowel connection. Such connections are subject to the following types of potential failure mechanism: (a) local failure characterized by the simultaneous yielding of the dowel and crushing of the surrounding concrete, and (b) global failure, characterized by spalling of the concrete between the dowel and the edge of the column or the beam. In this paper both types of failure of dowel connections are studied, although somewhat more attention is paid to the less investigated global failure. The local failure mechanism has been relatively well investigated, and the results have been presented in several studies. Thus only some minor changes are proposed in connection with the prediction of the related strength. On the other hand, the majority of existing procedures for the estimation of global strength are over-conservative since they neglect the influence of stirrups, or else only take them into account implicitly. None of these methods explicitly take into account the fact that the global failure of the dowel connection is changed by the presence of stirrups from brittle to ductile. In the paper, a new procedure for the estimation of resistance against global failure is proposed. Taking into account an appropriate strut and tie model of the connections, the influence of stirrups on this resistance as well as on the type of the failure is taken into account explicitly. Comparisons that were performed between the analytically calculated strength and the experimental results obtained have clearly shown that both of the proposed procedures for the estimation of resistance against local and global failure agree very well with the experimental results.
机译：预制系统的行为取决于预制元件之间特定连接的性能。在欧洲预制设计实践中，梁与柱之间最常见的连接类型是销钉连接。此类连接受以下类型的潜在破坏机制的影响：（a）以榫钉同时屈服和周围混凝土压碎为特征的局部破坏，以及（b）以榫钉与混凝土之间的混凝土剥落为特征的整体破坏。柱或梁的边缘。在本文中，研究了销钉连接的两种类型的失效，尽管对较少研究的整体失效给予了更多的关注。局部失效机理已得到比较充分的研究，其结果已在几项研究中提出。因此，仅提出了一些与相关强度的预测有关的微小变化。另一方面，大多数现有的整体强度估算程序过于保守，因为它们忽略了箍筋的影响，或者只是隐式地考虑了箍筋的影响。这些方法均未明确考虑到通过销钉从脆性变为延性来改变销钉连接的整体故障这一事实。在本文中，提出了一种新的估计整体失效抵抗力的程序。考虑到连接的合适的支撑模型，明确考虑了箍筋对此阻力的影响以及对破坏类型的影响。在分析计算的强度和获得的实验结果之间进行的比较清楚地表明，用于估计对局部和整体破坏的抵抗力的两种拟议程序与实验结果非常吻合。

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