This paper mainly focused on the seismic performance and shear calculation method of steel reinforced high-strength concrete (SRHC) columns with rectangular helical hoops. An experimental investigation was performed in this paper. Eleven SRHC columns with rectangular helical hoops and one with ordinary hoops were constructed at the laboratory of Guangxi university. The failure modes, hysteresis loops, envelope curves, characteristic loads and displacements and cumulative damage analysis are presented and investigated. It can be seen from the test results that the failure modes of SRHC columns can be divided into three types with the shear span ratio increased, namely, shear baroclinic failure mode, flexure-shear failure mode and flexure failure mode. In addition, the specimens with rectangular helical hoops have plumper hysteretic loops. Shear span ratio is the main influencing factor of characteristic load; the axial compression ratio and concrete strength have less influence on characteristic load, while stirrup ratio has little effect on the characteristic load. Finally, a calculation method for shear capacity of SRHC columns under shear baroclinic failure and flexure-shear failure mode is proposed.

本文主要针对矩形螺旋箍筋的钢筋混凝土高强混凝土柱的抗震性能和抗剪计算方法。本文进行了实验研究。广西大学实验室建造了11根矩形螺旋箍SRHC柱和1根普通箍箍的SRHC柱。给出并研究了失效模式，磁滞回线，包络曲线，特征载荷和位移以及累积损伤分析。从测试结果可以看出，随着剪切跨度比的增加，SRHC柱的破坏模式可以分为三种类型，即剪切斜压破坏模式，弯曲剪切破坏模式和弯曲破坏模式。此外，带有矩形螺旋箍的样本具有饱满的磁滞回线。剪跨比是特征荷载的主要影响因素。轴向压缩比和混凝土强度对特征荷载的影响较小，而箍筋比对特征荷载的影响较小。最后，提出了剪斜压破坏和弯曲剪切破坏模式下SRHC柱抗剪承载力的计算方法。