期刊文献+

基于变权重和D-S证据理论的桥梁安全评估 预览

Safety Assessment of Bridges Based on Variable Weight and D-S Evidence Theory
在线阅读 下载PDF
分享 导出
摘要 桥梁结构的安全评估受环境侵蚀、材料老化、外部荷载等多源因素的影响,采用单一指标评价桥梁的安全性容易产生误判.因此,提出一种基于信息融合的多因素桥梁安全评估方法.该方法首先确定每种因素的变化区间,通过多工况数值计算提取典型的力学指标,利用信息熵和模糊层次分析法确定指标的变权重及单指标的等级划分原则并转化为基本概率指派函数.采用Dempster组合规则确定融合后的安全等级,从而建立桥梁的安全评估先验数据库.将该方法应用于预应力连续梁桥的安全评估中,结果表明该评估方法客观、合理,具有一定的工程实用性. The safety assessment of bridge structures can be affected by multi-source factors such as environmental erosion, material aging and external loads.Using single index to evaluate the safety of bridges is prone to misjudgment.Therefore, a multi-factor bridge safety assessment method based on information fusion was proposed.In this method, the variation region of each influence factor was first determined;then the mechanical indexes were extracted through numerical analysis under various load cases;and then the information entropy and fuzzy analytical hierarchy process were utilized to determine the variable weights of index and the grade criterion of single index so as to acquire the basic probability assignment function.The Dempster combination rules was used to determine the fusion safety level and establish the prior database of bridge safety assessment.The proposed method was applied to the safety assessment of a pre-stressed concrete continuous bridge, and the results showed that the proposed method is objective, reasonable and applicable to engineering practice.
作者 梁力 孙爽 李明 李鑫 LIANG Li;SUN Shuang;LI Ming;LI Xin(School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China)
出处 《东北大学学报:自然科学版》 EI CAS CSCD 北大核心 2019年第1期99-103,共5页 Journal of Northeastern University(Natural Science)
基金 国家自然科学基金资助项目(51474048).
关键词 桥梁工程 安全评估 D-S证据理论 多源影响因素 变权重 bridge engineering safety assessment D-S evidence theory multi-source influence factors variable weight
作者简介 梁力(1955-),男,辽宁丹东人,东北大学教授,博士生导师.
  • 相关文献

参考文献3

二级参考文献13

共引文献27

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈