This paper studies the influence of different factors on the mechanical properties of multi-stage yield BRB under cyclic loading.Under the condition that the weakening ratio is determined,the change rules of multi-stage yield BRB hysteretic curve,energy dissipation capacity,tension compression imbalance coefficient and equivalent viscous damping ratio were analyzed by numerical simulation under the three conditions of changing the number of weakening segments,different weakening segment spacing and initial defects.The calculation results show that when the number of weakening segments is two,the hysteretic curve is full and the energy consumption capacity is stable.With the increase of the number of weakening segments,the energy consumption capacity decreases.When the distance between the weakening segments is equal to the distance between the weakening segments and the end of the core,the hysteretic curve is full and the energy dissipation capacity is the best;When the control ratio of the initial defect is within 2％,the difference of the hysteresis curve is small,which indicates that the influence of the initial defect on the support performance is not obvious.
关键词
多段屈服/削弱段数量/削弱段间距/力学性能
Key words
multi-stage yield/number of weakened segments/weakening segment spacing/mechanical property
维普
万方数据