Shear behaviour of composite dowels in transversely cracked concrete
Shear behaviour of composite dowels in transversely cracked concrete
复制标题
复合销钉在横向裂缝混凝土中的剪切性能
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
M. Herbrand
中科院分区：
文献类型：
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作者：
M. Classen;M. Herbrand
在钢-混凝土组合梁中，可以使用创新的组合销钉来传递混凝土板和型钢截面之间的剪力。今天，复合材料销钉主要用于工程结构，如预制复合材料桥梁。然而，由于它们易于制造、良好的承载和变形性能以及适用于细长的混凝土板，这些复合销钉也比以往任何时候都更多地用于建筑施工。本文介绍了厚度仅为10 cm的混凝土细长板拼图组合销钉的抗剪试验。除了不同的配筋形式外，还研究了不同的纵向应力状态和横向裂缝对混凝土板的影响。在以往对复合材料桩抗剪承载力的研究中，忽略了横向裂纹的影响。然而，我们自己的试验表明，混凝土裂缝对复合桩的抗剪能力有很大影响。为了模拟试验和分析开裂和未开裂混凝土中复合销钉的抗剪性能，建立了抗剪试验的三维非线性有限元模型。本文总结了实验和数值研究的结果。
In steel‐concrete composite girders, innovative composite dowels can be used to transfer the shear forces between the concrete slab and the steel section. Today, composite dowels are predominately used in engineering structures such as prefabricated composite bridges. However, due to their ease of manufacture, good loadbearing and deformation properties and suitability for slender concrete slabs, these composite dowels are being used more than ever in building construction as well. The present article describes shear tests on puzzle‐shaped composite dowels for slender concrete slabs with a depth of only 10 cm. Aside from different reinforcement configurations, the influence of different longitudinal stress states and transverse cracking in the concrete slab have been investigated. In previous studies of the shear force capacity of composite dowels, the influence of transverse cracking has been neglected. However, our own experiments described in this paper show that the shear capacity of composite dowels is significantly affected by concrete cracking. In order to simulate the experiments performed and to analyse the shear behaviour of the composite dowels in cracked and uncracked concrete, a three‐dimensional, non‐linear finite element model of the shear tests was set up. The results of both the experimental and numerical investigations are summarized in this paper.