胶合木-混凝土组合梁螺钉连接件推出试验研究

发布时间：2018-12-28 09:22

【摘要】：胶合木-混凝土组合梁中的剪力连接件是整个组合梁中至关重要的一部分。为了抵抗木梁与混凝土板之间的纵向剪力和滑移,不仅要求剪力连接件具有一定刚度,还必须具有足够的受剪承载力。为了研究胶合木-混凝土组合梁螺钉连接件的受力性能,对10组共30个胶合木-混凝土组合梁螺钉连接件进行推出试验研究。根据试验结果,探讨了螺钉连接件的受力特性和破坏机制,分析了螺钉直径、螺钉嵌入长细比、混凝土强度、螺钉布置方式等因素对螺钉连接件受剪承载力的影响。结果表明,螺钉连接件受剪承载力随螺钉直径的增大而增大;螺钉连接件受剪承载力随螺钉嵌入木材部分长细比的增大而增大,但增长幅度趋于平缓;混凝土强度和螺钉布置方式对受剪承载力的影响很小。研究结果可以为胶合木-混凝土组合梁的设计和工程应用提供参考。
[Abstract]:Shear connectors in glued wood-concrete composite beams are an important part of the whole composite beam. In order to resist the longitudinal shear force and slippage between wood beam and concrete slab, not only the shear joint has a certain stiffness, but also it must have enough shear bearing capacity. In order to study the mechanical properties of the screw connectors of glued wood-concrete composite beams, 10 groups of 30 glued wood-concrete composite beam screw connectors were tested and studied. Based on the test results, the mechanical characteristics and failure mechanism of screw connectors are discussed. The effects of screw diameter, ratio of length to aspect of screws embedded, concrete strength and screw arrangement on shear capacity of screw connectors are analyzed. The results show that the shear capacity of screw connectors increases with the increase of the diameter of screws, and the shear capacity of screw connectors increases with the increase of the ratio of length to slenderness of the part of the screws embedded in wood, but the increasing range tends to be flat. Concrete strength and screw arrangement have little effect on shear capacity. The results can provide reference for the design and engineering application of glued wood-concrete composite beams.
【作者单位】：南京工业大学土木工程学院;
【基金】：国家自然科学基金(51478220)
【分类号】：TU398.9

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