摘要
为了弥补现有关于钢管混凝土柱抗扭性能分析理论的缺陷,建立了钢管混凝土柱在轴力-扭矩复合作用下全过程分析的分层筒理论模型。以几何方程、材料本构方程和平衡方程三大力学方程为基础,引入了截面扭率和各层筒的剪应变之间的线性剪应变分布假设,并结合已有的成熟的混凝土材料本构模型,使所采用的混凝土本构模型能够同时考虑钢管约束效应和混凝土受压软化效应。然后编制了钢管混凝土柱在轴力-扭矩复合作用下的全过程受力性能分析程序,并进行了充分的试验验证。提出的分层筒模型可为全面分析钢管混凝土柱的抗扭性能提供理论模型基础。
In order to study the torsion behavior of concrete filled steel tube columns, a theoretical model for process analysis of concrete filled steel tubes under axial force and torsion was established. The laminated tubes method was employed for dividing the column section. Based on geometrical, material constitutive and equilibrium equations, linear distribution assumption for shear strain on the section was introduced and a concrete material model considering the confined effect of steel tube and compression softening caused by transverse tension was proposed. The theoretical results were validated by tests. The torsion behavior of concrete filled steel tube could be analyzed using this theoretical model.
出处
《土木工程学报》
EI
CSCD
北大核心
2013年第1期16-23,共8页
China Civil Engineering Journal
基金
清华大学自主科研资助计划
国家自然科学基金项目(51078206)
关键词
钢管混凝土柱
轴力
扭矩
复合作用
全过程分析
concrete filled steel tube
axial force
torsion
combined action
process analysis
