粘贴钢板加固计算模式不确定性分析  

Uncertainty analysis of calculation model for strengthened with bonded steel plates

作　　者：任伟[1,2] 闫磊[1] 

机构地区：[1]长安大学公路学院,西安710064 [2]浙江大学建筑工程学院,杭州310027

出　　处：《中国科技论文在线》2009年第7期538-542,共5页

基　　金：高等学校博士学科点专项科研基金新教师基金资助项目(200807101008);西部交通建设科技资助项目(200731882231)

摘　　要：以钢板加固后的构件为研究对象,利用可靠度方法针对其计算模式的不定性因素进行了分析。首先归纳了钢板加固计算模式不定性因素的影响。在此基础上,收集了63片钢筋混凝土梁钢板加固的试验数据,试验研究范围涉及待加固梁损伤程度、钢板用量、初始荷载、锚栓间距及粘贴用胶种类等诸多因素;其次,通过对不定性统计参数Kp的样本值进行概率分析,得到在信度α=95%、自由度ν=4条件下的Kp代表值为0.76;最后得到修正后的对钢板加固混凝土梁正截面抗力计算模型。研究成果对加固后混凝土构件的可靠性研究有一定借鉴意义。By taking the members strengthened by Steel Plates as the research object,the uncertainty factors of the calculation model were analyzed by using reliability method. Firstly,the influence of uncertainty factors about calculation model for steel plate reinforcement was summarized. On this basis,the tests data from 63 reinforced concrete beam strengthened by bonded steel plates were collected,and investigate range involved many factors,including the damage degree of beam to be reinforced,the consumption of steel plates,initial load,the distance between anchor bolts,the types of adhesives used in pasting and so on. Secondly,according to the probability analysis for sample value of uncertainty statistical parameterKp,Kprepresentative value,0.76,was obtained under the conditions when the confidence level was 95% and degree of freedom was 4. Finally,the corrected resistance model of normal section in reinforced concrete beam strengthened by steel plates was summarized. The research result has certain reference significance to reliability study of strengthened concrete members.

关 键 词：桥梁工程 粘贴钢板 加固后可靠度 计算模式不确定性 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]