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收集了206个国内外型钢混凝土(SRC)柱试验结果,分析研究剪跨比、弯剪比、轴压力系数、体积配箍率和配钢率5个主要参数对SRC柱破坏形态的影响,提出以剪跨比、弯剪比划分SRC柱破坏形态的方法。根据现行抗震设计规范和SRC柱的试验破坏过程确定SRC柱的5个性能状态,以构件骨架曲线为基础得到构件各性能状态的位移角限值。在不同破坏状态下,分析各性能状态位移角限值和5个主要参数的关系,得到轴压力系数是影响构件位移角限值变化的关键参数,统计得到与SRC柱5个性能状态对应的变形指标限值,并进行可靠性分析。结果表明该文所给出的破坏形态划分方法能够较好的预测不同的破坏形态;根据轴压力系数给出的SRC柱变形指标限值的保证率在合理范围之内。
206 test results of SRC columns at home and abroad were collected. The influences of shear-span ratio, bending-shear ratio, axial pressure coefficient, volumetric stirrup ratio and steel-making ratio on the failure morphology of SRC columns were analyzed. The method of dividing the SRC column failure mode by the shear span ratio and the bending shear ratio. Five performance states of the SRC column were determined according to the current code for seismic design and the test failure process of SRC column. Based on the component skeleton curve, the displacement angle limit of each component state was obtained. Under different failure states, the relationship between the displacement limit of each performance state and the five main parameters is analyzed. The axial pressure coefficient is the key parameter that affects the variation of the displacement angle of the component. The deformation corresponding to the five performance states of the SRC column is obtained Indicator limits, and reliability analysis. The results show that the proposed method can predict different failure modes well. The guaranteed rate of deformation limit of SRC column is within a reasonable range according to the axial pressure coefficient.