低周反复荷载下型钢混凝土-钢筋混凝土竖向混合结构转换柱受剪性能试验研究

为了研究型钢混凝土-钢筋混凝土竖向混合结构转换柱的受剪性能，对16个转换柱试件和1个钢筋混凝土柱对比试件进行了低周反复荷载试验。分析了转换柱试件的破坏形态，研究了其位移延性、承载能力、强度衰减，以及耗能能力等方面的力学性能，并与钢筋混凝土柱试件进行了对比。试验结果表明:转换柱的破坏形态可以分为剪切破坏、粘结破坏和弯曲破坏；转换柱中钢与混凝土之间的相互作用方式导致了其特殊的破坏特征；发生粘结破坏和弯曲破坏的试件，其最大承载力之后的强度衰减较大；转换柱的耗能能力介于型钢混凝土柱与钢筋混凝土柱之间。绝大多数转换柱试件的延性性能能够满足位移延性系数大于3的抗震设防要求。

EXPERIMENTAL STUDY ON SHEAR PERFORMANCE OF STEEL REINFORCED CONCRETE-REINFORCED CONCRETE TRANSFER COLUMN UNDER LOW CYCLIC REVERSED LOADING

Experiments of 16 transfer columns in an SRC-RC hybrid structure and 1 reinforced concrete column under low cyclic reversed loading were carried out to research the shear performance of transfer columns. The analysis on failure patterns was done. Shear performances were studied such as displacement ductility, load bearing capacity, bearing capacity degeneration and energy dissipation. It indicates that there are three failure patterns for transfer columns including shear failure, bond failure and bending failure. Special failure patterns of the transfer columns are due to cooperation manner between concrete and shape steel. The degeneration of load-bearing capacity is obvious for specimens of bond failure and bending failure. Energy dissipation abilities of transfer columns are at the interval of reinforced concrete columns and steel reinforced concrete columns. Most specimens of transfer columns can satisfy the seismic resistance requirement of a ductile coefficient greater than 3.