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目的找出低周往复荷载作用下蜂窝梁腹板局部屈曲对框架节点滞回性能的影响规律.方法采用理论分析、试验以及有限元相结合的方法,研究不同腹板高厚比的蜂窝梁框架节点的地震破坏机理、骨架曲线、刚度退化、延性以及耗能能力,得出不同腹板高厚比对蜂窝梁框架节点滞回性能的影响规律.结果腹板高厚比对蜂窝梁框架节点的滞回性能影响显著,随着腹板高厚比的增大,蜂窝梁框架节点滞回性能变差;当高厚比达到一定值后,蜂窝梁腹板产生屈曲,框架节点的滞回性能会迅速变差.结论为保证蜂窝梁框架节点具备良好的滞回性能,应严格限制高厚比.
Objective To find out the rule of local buckling of honeycomb webs on hysteretic behavior of frame joints under low cyclic loading.Methods The theoretical analysis, experiments and finite element method were used to study the effect of different ratios The failure mechanism, the skeleton curve, the stiffness degeneration, the ductility and the energy dissipation capacity of the honeycomb girder frame are obtained.The results show that the ratio of the web height to the thickness of the honeycomb girder frame node Hysteretic behavior is significant. With the increase of web thickness-to-thickness ratio, the hysteretic behavior of honeycomb girder frame joints becomes worse. When the thickness ratio reaches a certain value, buckling of honeycomb girder webs occurs, and the hysteretic behavior of frame joints Rapid deterioration.Conclusion In order to ensure good hysteretic behavior of honeycomb beam joints, the ratio of height to thickness should be strictly limited.