不等肢L形截面型钢混凝土异形柱极限承载力的研究

Load capacity of specially shaped steel concrete column

利用ANSYS有限元程序对不等肢L形截面桁架式型钢混凝土异形柱进行分析,研究了该类异形柱中型钢与混凝土的协同工作性能;混凝土强度等级及偏心距对桁架式型钢混凝土异形柱极限承载力的影响.分析结果表明:桁架式型钢混凝土异形柱中,型钢与混凝土能很好地协同工作;随着混凝土强度等级的提高,异形柱极限承载力也随之提高;加载点离截面力学中心越近,异形柱的极限承载力越大,且加载点偏心距对异形柱极限承载力的影响也越大.

Finite element method by ANSYS was adopted to study the behaviour of the specialshaped （L-cross section） truss steel reinforced concrete columns. The current study examines the cooperation of shaped steel and concrete. The effect of concrete strength and loading eccentricity on the ultimate bearing capacity of the special-shaped steel concrete columns are also investigated. It is found that the shaped-steel can cooperate with concrete well during loading. With the increment of concrete strength, ultimate bearing capacity of the steel concrete column can obviously increase. The closer the load point to the mechanical center of column section, the larger the ultimate bearing capacity, indicating that the loading eccentricity has a significant effect on ultimate bearing capacity.