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蜂窝钢梁的抗弯承载力受局部和整体失稳影响。使用有限元法研究混合屈曲模式下蜂窝钢梁的非弹性性能,建立一个考虑弯扭或畸变屈曲和横截面局部化变形之间相互作用的三维的非线性有限元模型,并根据现有研究文献中的可用结果进行验证。研究包括受三种不同荷载(跨中荷载、均布荷载和端弯矩)作用的简支梁,通过参数分析,从而评估不同几何参数对蜂窝钢梁非弹性稳定性的影响。这些参数包括钢梁横截面尺寸、翼缘宽度和厚度、腹板高度和厚度、开孔的形状和间距。介绍模拟研究中考虑各种尺寸的不同屈曲模式所对应的弯矩梯度因子。研究结果有望帮助更深入地研究蜂窝钢梁的性能,并准确预测弯矩梯度因子和这种特殊钢梁的抗弯承载力。
Bending capacity of honeycomb steel beams is affected by local and overall instability. The finite element method is used to study the inelastic behavior of honeycomb steel beams under mixed buckling mode. A three-dimensional nonlinear finite element model considering the interaction between buckling or distortion buckling and cross-section deformation is established. According to the existing research literature In the available results to verify. The study included simple supported beams subjected to three different loads (mid-span load, uniform load and end-bending moment) and analyzed the parameters to evaluate the effect of different geometrical parameters on the inelastic stability of honeycomb girder. These parameters include the beam cross-sectional dimensions, flange width and thickness, web height and thickness, hole shape and spacing. Introduce the bending moment factor corresponding to different buckling modes of various sizes in simulation studies. The results are expected to help further investigate the performance of honeycomb steel beams and accurately predict the bending moment factor and the flexural capacity of such special steel beams.