摘要
采用三次多项式分段模拟混凝土、钢筋和型钢材料的非线性本构关系 ,以平截面假定为基础 ,推导出双向偏压钢筋混凝土、钢骨混凝土及钢 -混凝土组合构件截面非线性分析通用公式 ,得到的截面割线、切线刚度矩阵是线性与非线性刚度矩阵的叠加。应用标准有限元方法和截面非线性刚度矩阵 ,推导出梁单元刚度表达式。所得到的表达式含义清晰、计算简便 。
The nonlinear constitutive relationship of concrete, structural steel and reinforcement is simulated with several segments of cubic polynomial functions in this paper. On the basis of plain section assumption, nonlinear analysis formulas of steel concrete composited member section under biaxial eccentric compression loading are derived. The derived nonlinear secant and tangent stiffness matrices are the simple summation of linear stiffness matrix and nonlinear matrices. The matrices are easy to understand and compute. The analyzed results correspond well to those of the experiment.
出处
《工业建筑》
CSCD
北大核心
2002年第2期44-45,57,共3页
Industrial Construction
基金
国家自然科学基金资助项目 ( 5 99780 0 4)
关键词
钢筋混凝土
钢-混凝土组合结构
材料非线性
割线刚度
切线刚度
reinforced concrete\ steel concrete composite structure\ material nonlinearity\ secant stiffness\ tangent stiffness
