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为计算钉杆弯曲破坏机理下槽口钉类连接件抗剪承载力,提出木-混组合梁槽口钉类连接件抗剪承载力计算方法。参照依据新西兰标准和欧洲规范的槽口螺钉连接件抗剪承载力计算方法——NZS法、修正折减参数η*的EC*法,针对混凝土剪切破坏和钉类弯曲变形造成连接失效的破坏机理,采用销钉连接件抗剪承载力计算式替代2种方法中螺钉抗拔承载力,得到考虑钉杆弯曲破坏的NZS法、EC*法,用以计算槽口钉类连接件抗剪承载力。以9组木-混组合梁推出试件为例,采用这2种方法计算试件的槽口栓钉连接件抗剪承载力,并与试验值对比。结果表明,2种方法均未考虑槽口深度对木-混组合梁槽口钉类连接件抗剪承载力的影响;相较于考虑钉杆弯曲破坏的EC*法,考虑钉杆弯曲破坏的NZS法的计算值与试验值吻合更好,能够较好地计算槽口钉类连接件钉杆弯曲破坏时的抗剪承载力。
In order to calculate the shear strength of the spigot-studs under the mechanism of nail-bar bending failure, a method to calculate the shear strength of stud-spigot-studs is proposed. According to the New Zealand standard and the European standard, the method of calculating the shear capacity of slotted screw connection - the NZS method and the EC * method of amending the reduction parameter η *, aiming at the failure of connection failure caused by concrete shear failure and nail bending deformation Mechanism, the use of pin connector shear strength calculation method to replace the two methods of screw pull-up bearing capacity, to consider the nail bending damage NZS method, EC * method to calculate the shear strength of the notch nail connector . Taking 9 wood-composite composite beams as an example, the shear bearing capacity of notched dowel connections of specimens was calculated by these two methods and compared with the experimental values. The results show that both methods do not consider the effect of notch depth on the shear strength of doweled wood-composite composite beams. Compared with the EC * method, which considers the bending damage of the dowel bar, The calculated value of NZS method is in good agreement with the experimental value, which can well calculate the shear capacity of the dowel bar when it is bent and damaged.