| 基于损伤理论的某钢筋混凝土梁疲劳寿命预测 |
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| 引用本文： | 季家林,李慧剑,闫国亮,赵庆新.基于损伤理论的某钢筋混凝土梁疲劳寿命预测[J].武汉理工大学学报(交通科学与工程版),2009,33(1). |
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| 作者姓名： | 季家林 李慧剑 闫国亮 赵庆新 |
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| 作者单位： | 燕山大学建筑工程与力学学院,秦皇岛,066004 |
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| 基金项目： | 河北省建设科技研究计划 |
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| 摘 要： | 通过对钢筋混凝土梁的连续超声波检测,结合温度对超声波在混凝土中传播速度影响的实验研究,修正了现场连续观测时的温度效应,选取与超声波波速有关的外部损伤变量,并根据Min-er线性积累损伤准则,建立了其损伤演化方程.通过研究混凝土受损前后的强度和超声波传播速度,选取与强度有关的内部损伤变量,建立了内、外损伤变量之间的关系.应用有限元方法分析了梁中钢筋与混凝土的应力状态,并应用实用可靠度方法建立了梁疲劳破坏的极限状态方程.应用极限状态方程、内外损伤变量关系和梁的损伤演化方程分析了钢筋混凝土梁的剩余寿命.
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| 关 键 词： | 损伤变量 钢筋混凝土梁 寿命预测 超声波 温度 有限元 |
Prediction of Fatigue Life of RC Beam Based on Damage Theory |
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| Ji Jia-lin,Li Hui-jian,Yan Guo-liang,Zhao Qing-xin.Prediction of Fatigue Life of RC Beam Based on Damage Theory[J].journal of wuhan university of technology(transportation science&engineering),2009,33(1). |
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| Authors: | Ji Jia-lin Li Hui-jian Yan Guo-liang Zhao Qing-xin |
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| Institution: | College of Civil Engineering and Mechanics;Yanshan University;Qinhuangdao 066004 |
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| Abstract: | The continuous testing by ultrasonic wave elastic of RC beam,effect of temperature on ultrasonic wave velocity in concrete was modified by experiments in lab.Chosen function of ultrasonic wave velocity in concrete as outer damage variety,based on above and Miner liner damage accumulation theory,damage evolution equation was established.The relation of strength and ultrasonic wave velocity of concrete with different damage were researched.By choosing the function of concrete strength as inner damage variety,... |
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| Keywords: | damage variety RC beam life estimation ultrasonic wave temperature finite element |
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