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该文对剪切型消能连梁的塑性强化特性展开了试验研究,并通过数值模拟分析不同参数对塑性强化特性的影响规律。研究表明轴向位移约束引起的附加轴拉力会提高连梁的塑性强化,且位移角越大时提高越明显。随着轴压力增大,连梁的塑性强化逐渐降低;轴拉力对连梁的塑性强化有一定提升,但轴拉比超过0.1后塑性强化值趋于稳定。腹板高厚比对连梁的塑性强化特性基本无影响;腹板宽高比、加劲肋间距和等效连梁长度系数e Vp/Mp的减小将提高连梁的塑性强化;钢材强化应力的增大会显著提高连梁的塑性强化。最后,提出连梁塑性强化特性的理论预测方法,试验和数值验证表明该方法具有较高的准确性。
In this paper, the plastic reinforced properties of shear-type energy dissipating beams are experimentally studied, and the influence of different parameters on the plastic strengthening properties is analyzed by numerical simulation. The research shows that the additional axial tension caused by the axial displacement constraint will increase the plastic strengthening of the connecting beam, and the more obvious the increase is when the displacement angle is larger. As the axial pressure increases, the plastic strengthening of the coupling beam decreases gradually. The axial tensile force increases the plasticity of the coupling beam, but the plastic strengthening value tends to be stable when the axial ratio exceeds 0.1. The ratio of web height to thickness has no effect on the plastic strengthening properties of the webs. The decrease of web width ratio, stiffener spacing and equivalent web length coefficient e Vp / Mp will increase the plasticity of webs. The increase will significantly improve the plastic strengthening of the beam. Finally, a theoretical prediction method of the plastic strengthening characteristics of the beam is proposed. The experimental and numerical results show that the proposed method has high accuracy.