端部箍筋配置对RC柱抗震性能的影响

Effects of the Arrangement of Stirrups at Column Ends on the Seismic Behavior of the Concrete Column

为了研究在不同转角范围内,钢筋混凝土柱在反复荷载作用下,两端箍筋的配置量及配置方式对柱端弯矩、柱抗压缩变形能力及柱端主筋变形的影响,浇筑了5根主筋配置与截面相同但两端箍筋配置量不同的钢筋混凝土柱并进行了试验。通过试验得到了不同转角范围内,柱端端部及柱端腹部箍筋的配置量及配置方式对柱的抗弯强度及抗弯变形能力、抗压缩变形能力等参数的影响趋势,以及柱端端部和柱端腹部箍筋的配置量对端部主筋变形的影响趋势。

In order to study the effect of the amount and arrangement methods of stirrup on the moment at column ends,the capacity of the resistance to compression and the deformation of the main reinforcement at column ends within the different scope of the rotation angle,5 cast in situ reinforced concrete columns which have the same main reinforcement allocation and cross section are tested under repeated loads. Through the experiments,the influence trends of the amount and arrangement methods of stirrup disposed at the end and abdomen of the column ends to the bending strength,flexural deformability,the compressive deformability and other parameters of the column are obtained,and the influence trend of the arrangement amounts to the deformation of the main reinforcements at column end is also derived.