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Cyclic shear behaviour of steel box girders: experiment and analysis

机译：钢箱梁的循环剪切特性：实验与分析

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摘要

An experimental investigation of the cyclic shear behaviour of steel box girders was conducted on one-quarter scale models, comprising of two specimens with longitudinally unstiffened webs and one specimen with longitudinally stiffened webs. All the specimens exhibited ductile behaviour. The tests evidenced significant increases in the shear strength and energy dissipation capacity regarding the use of thicker webs and the provision of longitudinal web stiffeners. The web stiffeners also enhanced the stable hysteresis behaviour without substantial degradation in the energy dissipation due to pinching. The test results are compared with the shear behaviour simulated by inelastic large deformation analysis incorporated with a sophisticated constitutive model. The hysteresis behaviour, peak cyclic shear stresses, energy dissipation, and deformation shapes of the three specimens are satisfactorily predicted by the analysis. It is verified that the presented analytical method can be used precisely for further investigations of box girders in shear.
机译：在四分之一比例模型上对钢箱梁的循环剪切特性进行了实验研究，该模型包括两个带有纵向未加固腹板的样本和一个带有纵向刚度腹板的样本。所有标本均表现出延性。测试表明，使用较厚的腹板和提供纵向腹板加劲肋，抗剪强度和能量消散能力显着提高。腹板加强筋还增强了稳定的滞后性能，而不会因收缩而导致能量耗散的显着降低。将测试结果与结合了复杂本构模型的非弹性大变形分析所模拟的剪切行为进行了比较。通过分析可以令人满意地预测三个样品的磁滞行为，峰值循环剪切应力，能量耗散和变形形状。验证了所提出的分析方法可以准确地用于剪力箱梁的进一步研究。

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