基于易损性分析的桁架桥传感器布设方法  

SENSOR ARRANGEMENT METHOD BASED ON VULNERABILITY ANALYSIS FOR A TRUSS BRIDGE

作　　者：姜绍飞[1] 杨博[2] 吴兆旗[1] 

机构地区：[1]福州大学土木工程学院,福建福州350108 [2]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《工程力学》2010年第A02期263-265,271,共4页Engineering Mechanics

基　　金：福建省青年科技人才创新项目(2007F3054);教育部重点项目(208064);福建教育厅重点项目(JA07002)

摘　　要：灾害或材料性能的退化其结构使用功能下降,为了有效地管理大型复杂结构并减少灾害的损失,结构健康监测系统的研发成为目前国际社会研究的热点。传感器的布设不仅决定着监测系统性能的好坏而且还影响着系统的造价与维护成本。该文从传感器布设的常用方法入手,提出了一种基于结构易损性分析的传感器布设方法。它基于构件刚度的重要性系数,通过其与冗余度的关系来搜索、确定结构的失效模式,并提出采用结构应变能来评价失效模式的损伤需求,进而确定最易损结构失效路径,据此布置传感器。最后通过一个桁架桥算例验证了该方法的可行性和有效性。研究发现,所提出的方法是可行的、有效的。To manage a large-scale complex structure effectively and reduce damage lost induced by disasters and structural material deterioration,it is nowadays a focus to investigate and develop a large structural health monitoring（SHM） system.Sensor arrangement takes an important role in the SHM system due to its characteristics not only depending on the system performance but also impacting on the management cost.In this paper,the sensor arrangement methods used commonly were introduced firstly,and then a novel sensor arrangement method based on structural vulnerability analysis was proposed.In which,the important factors of members are calculated first,and the redundancy of each members is obtained by the relation of the redundancy and important factor;then the failure modes are searched and determined by the redundancy;afterwards the strain energy of a structure is presented to evaluate the damage demand of a failure mode;consequently the fragility failure path is determined;furthermore,the sensors are arranged based on the fragility failure path.A truss bridge model was validated the proposed method finally.The results show that the proposed method is feasible and effective.

关 键 词：易损性分析 重要性系数 冗余度 最易损路径 传感器布设 

分 类 号：U446[建筑科学—桥梁与隧道工程]