Abstract

Info

Title:: Evaluation on Element Importance Based on Objective Weighting Method

Author(s):: ZHU Li-hua; WANG Ning-juan; DAI Jun; School of Civil Engineering, Xi’an University of Architecture and Technology

Keywords:: element importance; objective weighting method; weight coefficient; progressive collapse

Abstract:: Three 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.