摘要
所研究的曲线形钢框架结构,多处采用曲线设计,外形优美,结构受力复杂。若采用传统设计软件的线单元进行模拟,很难全面反映出结构的应力、应变情况,因此通过有限元软件ABAQUS,对结构模型进行三维实体有限元模拟,并考虑几何缺陷和材料非线性,对框架进行非线性屈曲分析,得到框架结构的极限承载力、塑性发展及变形情况;最后研究曲线形钢框架在低周往复荷载作用下的延性系数、滞回性能和耗能能力。研究表明:此框架不仅满足结构的弹性设计要求,而且在极限荷载和循环荷载作用下,表现出良好的塑性变形能力、滞回性能和耗能能力。
The curvilinear figure steel frame structure with graceful shape and complicated loading state that it adopted curve design was studied in this paper.The simulation which using line element of traditional design software is difficult to fully reflect the stress-strain conditions of the structure.Therefore,the finite element simulation of three-dimensional solid model for the structural model was carried out by using finite element software ABAQUS.In order to obtain the ultimate bearing capacity,plastic development and deformation of the structure,geometrical nonlinear stability analysis was carried out considering geometric imperfections and material nonlinearity.Finally,the ductility factor,hysteretic behavior and energy dissipation capacity of curvilinear figure steel frame under low-cycle cyclic load were investigated.The results showed that this framework was not only designed to meet the requirements of elastic design,but also exhibited good plastic deformation,hysteretic behavior and energy dissipation capacity under the ultimate load and cyclic loading.
出处
《钢结构》
北大核心
2015年第9期40-45,共6页
Steel Construction
基金
国家自然科学基金项目(51248009)
关键词
曲线形钢框架
屈曲分析
塑性发展
滞回性能
耗能能力
curvilinear figure steel frame
buckling analysis
plastic development
hysteretic behavior
energy dissipation capacity
