基于可靠度指标的空心钢管混凝土轴心受压构件设计

RELIABILITY DESIGN OF HOLLOW CONCRETE-STEEL TUBULAR MEMBER SUBJECTED TO AXIAL LOADING

考虑了空心钢管混凝土构件中钢与混凝土的共同工作性能,得到空心构件轴心受压的组合强度公式。同时按照构件中钢管和混凝土分别承担承载力的比例来求得空心钢管混凝土构件的组合可靠度指标,并基于试验,确定了空心钢管混凝土轴心受压构件的组合可靠度指标以及强度折减系数。

This paper studies cooperative behaviors of steel and concrete in a hollow-concrete-filled steel tube （H-CFST） under an axial loading.Based on the experiments,the formula of composite standard compressive strength was suggested.The derivation of composite reliability of H-CFST member analyses was acquired by the bearing capacity proportion of steel and concrete.According to the experimental results,the composite reliability index of H-CFST members was developed.Therefore,the coefficient of strength reduction is suggested by means of the Naional Standard.