基于客观赋权法的构件重要性评估

摘要

T hree kinds of evaluation methods ,including the average stress ratio method ,steady degradation factor method and rigidity degradation factor method for key elements were summarized .Besides ,the basic principle of objective weighting method was introduced ,and the method was applied into the evaluation for the key structural elements by defining the weight coefficient of each evaluation index .At last ,taking a plane frame structure as an example ,the evaluation on element importance was carried out by using the average stress ratio method ,the steady degradation factor method , the rigidity degradation factor method and the evaluation method based on objective weighting ,respectively .The results show that the evaluation method based on objective weighting method can find the key structural elements .Furthermore ,it can overcome the weakness of single target ,and has better superiority characteristic .%总结了平均应力比法、稳定退化系数法和刚度退化系数法3种关键构件的评价方法，介绍了客观赋权法的基本原理，并将客观赋权法应用于结构的构件重要性评估，确定各评价指标的权重系数。最后以平面框架为算例，分别使用平均应力比法、稳定退化系数法、刚度退化系数法和基于客观赋权法的评价方法对结构的构件进行重要性评估。结果表明：基于客观赋权法的评价方法能够很好地寻找出结构中的关键构件，而且克服了单一评价指标的不足，具有较好的优越性。