| 江阴长江大桥钢箱梁疲劳应力监测及寿命分析 |
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| 引用本文： | 余波,邱洪兴,王浩,郭彤. 江阴长江大桥钢箱梁疲劳应力监测及寿命分析[J]. 公路交通科技, 2009, 26(6) |
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| 作者姓名： | 余波 邱洪兴 王浩 郭彤 |
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| 作者单位： | 1. 东南大学,土木工程学院,江苏,南京,210096;江苏省交通科学研究院,江苏,南京,210017
2. 东南大学,土木工程学院,江苏,南京,210096 |
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| 摘 要： | 针对江阴长江大桥钢箱梁，进行了疲劳应力的监测分析和疲劳寿命的预测研究。利用实桥布设的应变传感器获取应变时程数据，处理成应力时程数据并结合雨流计数法技术，得到“日应力谱”和“标准日应力谱”。根据相关疲劳规范，研究了钢箱梁的疲劳寿命等问题。结果表明，由于车辆荷载谱或有限元模型均存在大量的假定简化，利用记录的应变（应力）时程数据进行疲劳寿命评估，为准确可靠的研究方法；应变传感器记录分析得到的日应力谱具有相似规律，“标准日应力谱”方法可以有效地处理应变传感器记录的大量实测数据。
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| 关 键 词： | 桥梁工程 钢箱梁 应变时程数据 标准日应力谱 疲劳应力 疲劳寿命 |
Fatigue Stress Monitoring and Fatigue Life Analysis of Steel Box Girder of Jiangyin Suspension Bridge |
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| YU Bo,QIU Hongxing,WANG Hao,GUO Tong. Fatigue Stress Monitoring and Fatigue Life Analysis of Steel Box Girder of Jiangyin Suspension Bridge[J]. Journal of Highway and Transportation Research and Development, 2009, 26(6) |
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| Authors: | YU Bo QIU Hongxing WANG Hao GUO Tong |
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| Affiliation: | 1.School of Civil Engineering;Southeast University;Nanjing Jangsu 210096;China;2.Jiangsu Transportation Research Institute;Nanjing Jangsu 210017;China |
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| Abstract: | For steel box girder of Jiangyin Suspension Bridge,fatigue stress monitoring and fatigue life prediction were implemented.Monitoring data of straintime were obtained by using the strain transducer distributed on the Jiangyin Suspension Bridge.After the monitoring data of stress-time were calculated from the monitoring data of strain-time,"day stress spectrum" and "standard day stress spectrum" were obtained with help of the rain flow count method.Based on the related fatigue criterion,fatigue life predictio... |
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| Keywords: | bridge engineering fatigue stress fatigue life steel box girder strain-time data standard day stress spectrum |
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