High Strength Bolts Subject to Tension and Prying
High Strength Bolts Subject to Tension and Prying
复制标题
承受拉力和撬动的高强度螺栓
DOI：
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发表时间：
1974
期刊：
影响因子：
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通讯作者：
W. Munse
中科院分区：
文献类型：
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作者：
R. S. Nair;P. C. Birkomoe;W. Munse
连接件已加载，以使螺栓受到拉力。研究中考虑了螺栓载荷变形特性（ASTM A325 和 A490）、三通几何形状和连接细节的影响。使用二维有限元技术对连接法兰进行建模，并使用典型的非线性螺栓载荷变形曲线来解释螺栓的行为。法兰上的载荷分布、法兰上的应力、螺栓载荷和螺栓变形是在零施加载荷下以增量计算到极限的。失效的原因要么是螺栓断裂，要么是法兰上形成塑料铰链。由于法兰变形而产生的撬力会导致某些连接的极限负载能力和疲劳强度大幅降低。经验方程用于预测三通连接的极限强度。
The connections were loaded so that the bolts received tension. The effects of bolt load-deformation characteristics (ASTM A325 and A490), the tee geometry and the connection detailing were considered in the investigation. A two-dimensional finite element technique was used to model the flange of the connection and a typical nonlinear bolt load deformation curve accounted for the bolt behavior. The load distribution on the flange, the stresses in the flange, the bolt load, and the bolt deformation were computed at zero applied load in increments to ultimate. Failure was either by bolt rupture or formation of a plastic hinge in the flange. The prying forces which develop as a result of flange deformation are shown to cause substantial reduction in both the ultimate load capacity and the fatigue strength for certain connections. Empirical equations are presented for the prediction of the ultimate strength of tee connections.