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通过对20个混凝土抗压强度为65.3~84.9MPa的型钢高强混凝土柱在轴力和水平荷载共同作用下的试验,对型钢高强混凝土柱的抗剪性能进行研究。试验主要考虑剪跨比、轴压比、配箍率和混凝土强度4个参数对构件抗剪性能的影响。由试验得到水平荷载下型钢高强混凝土柱的破坏形态,对剪跨比、轴压比、配箍率和混凝土强度对构件抗剪承载能力的影响进行分析,提出型钢高强混凝土柱抗剪承载能力的计算公式,该公式与我国现行混凝土结构设计规范中的斜截面承载能力计算公式相衔接,且计算结果偏于安全,可直接用于工程设计。
The shear performance of high-strength concrete columns with columns of 20 columns under the action of axial force and horizontal load was studied by 20 columns of high-strength concrete columns with compressive strength of 65.3-84.9 MPa. The test mainly considers the influences of shear-span ratio, axial compression ratio, stirrup ratio and concrete strength on shear resistance of members. The failure mode of HSC columns under horizontal load was obtained by experiment. The influence of shear span ratio, axial compression ratio, stirrup ratio and concrete strength on shear strength of members was analyzed, and the shear capacity of SRC columns This formula is connected with the calculation formula of load carrying capacity of oblique section in current Chinese concrete structure design code, and the calculation result is partial to safety and can be directly used in engineering design.