摘要
基于箱基、框架和地基土三者空间相互作用的分析模型确定箱基的整体弯矩和剪力，根据现行箱基设计规程ＪＧＪ６—８０的设计计算规定及构造要求计算各部件的局部设计内力并确定约束函数，建立了具有２９个优化变量和６１个约束函数的箱形基础最小造价优化设计数学模型。根据箱基的结构形式特点，提出优化变量子空间组合减维算法，以改进普通ε＿Ｋ──主动约束可行方向法的求优效率，算例表明，对于设计计算规定复杂、构造要求众多的箱基设计问题，优化方法具有主动设计的优势和明显的经济效益。
The golbal bending moment and shear force are determined based on the analyticniodel of spatial interaction of box foundation, frame structure and soil. The local designforces are computed and constraint functions are derived according to the requirements in thecurrent Design Code JGJ 6 80.The mathematical model, with 29 optimization variables and61 constrainst functions, is established for minimizing the price of box foundation.A dimen-sion-decreasing algorithm of subspace-combination method is developed to improve the opti-mizing efficiency of ε_K---active-constraint feasible direction method.It is demonstrated withan example that,for the design of such stucttires asbox foundations which are subjected to alot of complicated design provisions and construction requirements,optimization designmethod shows its superiority over traditional design method and ohvious economic benefit.
出处
《甘肃工业大学学报》
1994年第4期68-74,共7页
Journal of Gansu University of Technology
基金
甘肃省自然科学基金
关键词
最优设计
箱形基础
弯矩
剪力
可行方向法
ptimum design
box foundations
interaction
reinforced concrete structures
feasible direcion methods
