基于安全度约束的多次预应力钢结构优化设计(英文)  

OPTIMUM DESIGN BASED ON SAFETY CONSTRAINTS OF MULTI-STAGE PRE-STRESSED STEEL STRUCTURES

作　　者：张爱林[1] 任维杰[1] 

机构地区：[1]北京工业大学,北京100022

出　　处：《土木工程学报》2005年第8期26-30,共5页China Civil Engineering Journal

基　　金：FinancialsupportbytheNaturalScienceFoundationofChina(50278005)andBeijing(8012004)

摘　　要：建立了多次预应力钢结构优化设计的模型,考虑了应力、位移等安全性约束,将线性规划与满约束准则法相结合,提出了效率较高的新优化策略和方法,可以得出每一级的预应力值和各个构件的优化截面。分别对具有局部布索或整体布索的大跨度钢屋架、平行钢桁架进行了优化计算分析,验证了本文的理论和方法。An optimum design model is established for multi-stage pre-stressed steel structures, which accounts for safety constraints on the stresses and displacements of the structures. The optimum design method is put forward by combining linear programming with the principle of full constraints. The magnitudes of pre-stresses and the optimized sections of members at each stage can be obtained. Some examples such as large-span steel roof, horizontal parallel steel truss with local or global cables are provided to verify the proposed method.

关 键 词：安全度 多次预应力 优化设计 钢结构 

分 类 号：TU394[建筑科学—结构工程]