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采用通用有限元软件abaqus对3个方钢管柱—H型钢梁外隔板节点进行有限元分析,研究了圆弧形、30°、45°三种外隔板式钢框架节点在梁端往复位移荷载作用下的破坏形式、滞回性能、延性耗能、应力应变分布以及刚度退化规律等。分析结果表明:节点最终在外隔板上形成塑性铰,在同级荷载作用下,外隔板角度减小促进了外隔板塑性区的发展;45°、30°、圆弧形节点的屈服承载力、极限承载力和初始刚度依次降低,延性耗能能力增强。
Finite element analysis of the outer bulkhead joints of three square steel columns-H type steel beams was carried out by using the general finite element software abaqus. The joints of three kinds of outer-partition steel frame joints with circular arc shape, 30 ° and 45 ° were studied, Dislocation under the action of displacement load, hysteretic behavior, ductile energy dissipation, stress and strain distribution and stiffness degradation rules. The results show that the joint finally forms a plastic hinge on the outer partition, and the angle of the outer partition promotes the development of the plastic zone of the outer partition under the same level of load. The yield bearing of the joints of 45 °, 30 °, The force, ultimate bearing capacity and initial stiffness decrease in turn, and ductility energy dissipation capacity increases.