摘要
对PE材料、HDPE材料、PVC材料和钢材等不同弹性模量管材包裹下的预应力混凝土轴压方柱,建立了以稳定作为约束条件的非线性规划问题的数学模型。引入管材截面尺寸和壁厚的比值,将组合构件的截面特性用此系数表示,从而将非线性规划问题转化为可通过迭代计算公式直接获得优化解的问题。最后,利用该文方法对不同材料外包下的预应力混凝土轴压方柱在相同承载力条件下,分别进行了截面优化设计计算,并做了比较。分析表明,该文方法简单实用。
The nonlinear programming models with stability constraints are established for pre-stressed square concrete column wrapped with different materials,such as PE,HDPE,PVC,steel etc.By introducing the ratio of tube cross-sectional length to tube wall thickness,the cross-sectional characteristics of a composite member are indicated by this coefficient,and the nonlinear programming problem is transferred into the optimal design problem solved directly through the iteration formulas.Finally,by using this method,the calculations of cross-sectional optimization design are carried out for the pre-stressed square concrete column wrapped with different materials under the same capacity condition,and the comparison is made between the optimized design and no optimized one.The analysis shows that the proposed method is simple and practical.
出处
《工程力学》
EI
CSCD
北大核心
2011年第2期107-110,共4页
Engineering Mechanics
关键词
管材包裹混凝土
非线性规划
预应力
约束方程
迭代公式
concrete wrapped with tubing
nonlinear programming
pre-stressed
constraint equation
iteration formulas
