摘要
文章推导了一种在役简支钢箱梁桥的简化安全评估方法,分析了在役钢桥安全评估的前提假设,提出了适用于工程检测实践的"区段模型";在对比前人得到的频变-损伤线性函数基础上提出了区段损伤的无量纲频变函数,采用ANSYS和Origin软件计算并拟合了Fi-Sk关系曲线以便于实际运用;引入了桥梁安全评估指标并推导了在2种情况下的表达式;总结了简化安全评估的步骤,并给出了一个算例。
A simplified safety appraisal method of simply-supported steel girder bridge in service is proposed.Firstly,premises of safety appraisal method of steel bridge in service are discussed and ＇10-Segment Model＇ suiteble to actual inspecting engineering is presented.Then dimensionless frequency variation functions of local damage based on ＇10-Segment Model＇ are presented by contrasting former linear functions of that and Fi-Sk curves are analyzed by ANSYS and fitted by Origin for practice.Safety-appraisal indexes are introduced and formulations of them on two circumstances are derived.At last procedures of simplified safety appraisal are summarized and an example of numerical simulation is illustrated to verify the method.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第7期1024-1028,共5页
Journal of Hefei University of Technology：Natural Science
基金
高校科技创新工程重大项目培育基金资助项目(704003)
"十一五"国家科技支撑计划重大资助项目(2006BAJ03A02)
关键词
简支钢桥
频率测试
区域损伤
离散模型
安全评估指标
simply-supported steel bridge
frequency measurement
local damage
discrete model
safety-appraisal index
