基于可靠性的预应力钢桁架结构优化设计

Optimized design of pre-stress steel truss on reliability

预应力钢结构是一种将预应力与钢结构相结合的新型结构,本文对预应力钢桁架结构在可靠性分析的基础上,将可靠性指标引入分项系数中,建立优化数学模型,采用遗传算法进行全局选优,通过算例证明了其可行性和有效性.该优化算法可以为预应力钢结构的工程应用提供有价值的参考.

Pre-stress steel structure is a new type of structure in which it combines pre-stressed with steel structure. In this paper, the reliability index is replaced by subentry coefficient for genetic algorithm based on analyses of reliability, an optimal model is presented by using genetic algorithm of optimizing globally, the feasibility and validity of the algorithms are verified by actual engineering example. The optimized methods provide the worthy reference for practical pre-stress steel structure optimal design.