考虑自振周期的高层混凝土建筑结构动力优化设计

Dynamic Optimal Design to Limit Natural Period of Tall Reinforced Concrete Buildings

风载对高层建筑结构会产生一定的动力效应，控制这种动力效应的有效方法之一是限制结构的自振周期。本文提出了一种以有限元分析和严格推导的优化准则方法为基础的动力优化设计方法，将结构构件的截面尺寸作为设计变量，在构件单元的强度、构件单元尺寸和自振周期的限制等约束条件下，求解以最小结构重量为目标的最优解。算例表明，此算法十分有效、可靠，可适用于大型高层混凝土建筑结构的优化设计。

Wind loads will produce dynamic effects on tall buildings.One effective method to control the wind induced response in tall buildings is to limit their natural periods. This paper presents a dynamic optimal design technique to limit natural periods of building structures,which is based on finite element analysis and a rigorously derived Optimality Criteria method. Sizes of cross section of structural members are taken as design variables,and the presented algorithm seeks the minimum weight of structures under the constraints of member strength,limits to sizes of cross section of structural members and limit of natural period. An example shows that the presented approach is an effective and reliable optimization tool which can be used to optimize and design large scale tall reinforced concrete building structures.