长跨桥梁疲劳性能评价与安全监测方法研究
摘 要
本文通过研究长跨桥梁的疲劳性能评价与安全监测方法，旨在提高桥梁的使用寿命和安全性。文章首先介绍了研究的背景和国内外研究现状，进一步说明了本研究的目的和意义。接下来，通过对疲劳性能评价方法进行实验对比和分析，探讨了疲劳寿命曲线计算方法和损伤评价指标，以提高疲劳性能预测准确率。然后深入研究长跨桥梁疲劳测试与监测方法，详细介绍了无损检测技术、动应力监测技术和红外热像监测技术的具体应用，以判断桥梁结构是否达到预期寿命或出现疲劳损伤。在桥梁结构安全评估分析方面，本文探究了统计建模方法和土建软件建模方法，为目标桥梁提供了科学的预测结果和安全评估。最后，文章总结了本研究的贡献和不足之处，并展望了未来研究的方向。
关键词：长跨桥梁；疲劳性能；监测方法
Abstract
This paper aims to improve the service life and safety of long-span Bridges by studying the methods of fatigue performance evaluation and safety monitoring. This paper first introduces the research background and research status at home and abroad, and further explains the purpose and significance of this research. Then, through the experimental comparison and analysis of fatigue performance evaluation methods, the calculation method of fatigue life curve and damage evaluation index were discussed, so as to improve the accuracy of fatigue performance prediction. Then, the fatigue testing and monitoring methods of long-span Bridges are deeply studied, and the specific applications of nondestructive testing technology, dynamic stress monitoring technology and infrared thermal image monitoring technology are introduced in detail, so as to judge whether the bridge structure has reached the expected life or fatigue damage. In the aspect of bridge structure safety assessment and analysis, the statistical modeling method and civil engineering software modeling method are explored in this paper to provide scientific prediction results and safety assessment for target Bridges. Finally, the paper summarizes the contributions and shortcomings of this research, and looks forward to the future research direction.
Keywords：Long-span bridge; Fatigue performance; Monitoring method
目录
摘 要 I
Abstract II
一、绪论 1
（一）研究背景 1
（二）国内外研究现状 1
（三）研究目的和意义 2
二、疲劳性能评价方法 4
（一）疲劳试验原理 4
（二）疲劳寿命曲线计算方法 4
（三）疲劳损伤评价指标 5
三、长跨桥梁疲劳测试与监测方法 6
（一）无损检测技术 6
（二）动应力监测技术 6
（三）红外热像监测技术 7
四、疲劳性能实验研究 8
（一）实验设计与参数设置 8
（二）实验过程及结果分析 8
（三）性能评价与分析 9
五、结构安全评估分析与预测 10
（一）统计建模方法 10
（二）土建软件建模方法 10
（三）预测结果分析 11
结 论 13
致 谢 14
参考文献 15
摘 要
本文通过研究长跨桥梁的疲劳性能评价与安全监测方法，旨在提高桥梁的使用寿命和安全性。文章首先介绍了研究的背景和国内外研究现状，进一步说明了本研究的目的和意义。接下来，通过对疲劳性能评价方法进行实验对比和分析，探讨了疲劳寿命曲线计算方法和损伤评价指标，以提高疲劳性能预测准确率。然后深入研究长跨桥梁疲劳测试与监测方法，详细介绍了无损检测技术、动应力监测技术和红外热像监测技术的具体应用，以判断桥梁结构是否达到预期寿命或出现疲劳损伤。在桥梁结构安全评估分析方面，本文探究了统计建模方法和土建软件建模方法，为目标桥梁提供了科学的预测结果和安全评估。最后，文章总结了本研究的贡献和不足之处，并展望了未来研究的方向。
关键词：长跨桥梁；疲劳性能；监测方法
Abstract
This paper aims to improve the service life and safety of long-span Bridges by studying the methods of fatigue performance evaluation and safety monitoring. This paper first introduces the research background and research status at home and abroad, and further explains the purpose and significance of this research. Then, through the experimental comparison and analysis of fatigue performance evaluation methods, the calculation method of fatigue life curve and damage evaluation index were discussed, so as to improve the accuracy of fatigue performance prediction. Then, the fatigue testing and monitoring methods of long-span Bridges are deeply studied, and the specific applications of nondestructive testing technology, dynamic stress monitoring technology and infrared thermal image monitoring technology are introduced in detail, so as to judge whether the bridge structure has reached the expected life or fatigue damage. In the aspect of bridge structure safety assessment and analysis, the statistical modeling method and civil engineering software modeling method are explored in this paper to provide scientific prediction results and safety assessment for target Bridges. Finally, the paper summarizes the contributions and shortcomings of this research, and looks forward to the future research direction.
Keywords：Long-span bridge; Fatigue performance; Monitoring method
目录
摘 要 I
Abstract II
一、绪论 1
（一）研究背景 1
（二）国内外研究现状 1
（三）研究目的和意义 2
二、疲劳性能评价方法 4
（一）疲劳试验原理 4
（二）疲劳寿命曲线计算方法 4
（三）疲劳损伤评价指标 5
三、长跨桥梁疲劳测试与监测方法 6
（一）无损检测技术 6
（二）动应力监测技术 6
（三）红外热像监测技术 7
四、疲劳性能实验研究 8
（一）实验设计与参数设置 8
（二）实验过程及结果分析 8
（三）性能评价与分析 9
五、结构安全评估分析与预测 10
（一）统计建模方法 10
（二）土建软件建模方法 10
（三）预测结果分析 11
结 论 13
致 谢 14
参考文献 15
