基于青草背长江大桥健康监测的悬索桥技术状况评定方法研究
发布时间：2018-12-16 11:52
【摘要】：由于桥梁健康监测与评估系统相对于传统的桥梁检测方法具有长期性、实时性、高效性等显著优势,近些年来被广泛应用到各类重要桥梁上,受到桥梁工作者的广泛认可。然而,长期、高频的监测产生海量的健康监测数据,如何基于这些监测数据,完成对监测桥梁技术状况的评定是国内外学者致力解决的问题之一。现有基于健康监测技术状况评定方法多采用层次分析原理建立监测桥梁的层次分析模型,根据底层指标的评定结果逐层分析、汇总至顶层,完成监测桥梁技术状况的评定。但是由于该方法存在权重分配的问题,容易导致某一权重指标失效时总体评定结果变化结果较小,不符合工程实际情况。鉴于此,本文基于面向对象思想和斜拉桥索力优化影响矩阵法,提出了适用于基于健康监测的悬索桥技术状况评定方法,并将该方法用于青草背长江大桥健康状态评估,证明了该方法的适用性、有效性。本文主要开展了以下工作:①对青草背长江大桥健康监测实测样本数据进行统计分析,得到了青草背长江大桥主缆索力、吊杆拉力、主梁位移、主梁应变及索塔应变随时间变化规律,并尝试对监测数据中的温度效应进行剥离,着重对车辆荷载下各监测变量的响应进行分析。②通过对现有基于桥梁健康监测的技术状况评定方法研究分析,提出了面向对象的悬索桥技术状况评定方法,建立了青草背长江大桥对象系统。借鉴斜拉桥索力优化影响矩阵法,推导出了桥梁健康监测系统的影响方程,证明了各监测变量之间的内在联系。③提出了采用m维空间内的“超椭球”面作为桥梁健康监测系统的预警阀值,并据此建立了一种新的桥梁技术状况评定方法。④基于青草背长江大桥健康监测数据,分别采用本文提出方法和层次分析法对青草背长江大桥技术状况进行评定,分析了本文提出方法的优势。
[Abstract]:Compared with the traditional bridge detection methods, bridge health monitoring and evaluation system has many advantages, such as long-term, real-time, high efficiency and so on. In recent years, it has been widely used in all kinds of important bridges and widely recognized by bridge workers. However, long-term, high-frequency monitoring produces massive health monitoring data, based on these monitoring data, how to complete the monitoring of bridge technical status evaluation is one of the domestic and foreign scholars to solve the problem. The existing methods based on health monitoring technology status assessment mostly adopt the principle of hierarchical analysis to establish the monitoring bridge AHP model. According to the evaluation results of the bottom index layer by layer, it is summarized to the top layer to complete the evaluation of the monitoring bridge technical status. However, due to the problem of weight distribution in this method, it is easy to cause the change of the overall evaluation result when a certain weight index is invalid, which does not accord with the actual engineering situation. In view of this, based on the Object-Oriented idea and the cable force optimization influence matrix method of cable-stayed bridge, this paper puts forward a method for evaluating the technical condition of suspension bridge based on health monitoring, and applies this method to the health assessment of Qingcaobei Yangtze River Bridge. The applicability and validity of the method are proved. The main work of this paper is as follows: 1. Through statistical analysis of the sample data of the health monitoring of the Qingcaobei Yangtze River Bridge, the main cable force, suspender pull force and main beam displacement of the Qingcaobei Yangtze River Bridge are obtained. The strain of the main beam and the strain of the cable tower vary with time, and try to peel off the temperature effect in the monitoring data. The response of each monitoring variable under vehicle load is analyzed emphatically. 2 through the research and analysis of the existing technical condition assessment method based on bridge health monitoring, an object-oriented evaluation method for the technical condition of suspension bridge is put forward. The object system of Qingcao back Yangtze River Bridge is established. The influence equation of bridge health monitoring system is derived by using the influence matrix method of cable force optimization for cable-stayed bridge. It is proved that the internal relation among the monitoring variables. 3 the "super ellipsoid" surface in m dimensional space is used as the early warning threshold of the bridge health monitoring system. Based on the health monitoring data of Qingcaobei Yangtze River Bridge, this paper presents the method and the Analytic hierarchy process (AHP) to evaluate the technical status of Qingcaobei Yangtze River Bridge. The advantages of the proposed method are analyzed.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U446;U448.25
本文编号：2382286
[Abstract]:Compared with the traditional bridge detection methods, bridge health monitoring and evaluation system has many advantages, such as long-term, real-time, high efficiency and so on. In recent years, it has been widely used in all kinds of important bridges and widely recognized by bridge workers. However, long-term, high-frequency monitoring produces massive health monitoring data, based on these monitoring data, how to complete the monitoring of bridge technical status evaluation is one of the domestic and foreign scholars to solve the problem. The existing methods based on health monitoring technology status assessment mostly adopt the principle of hierarchical analysis to establish the monitoring bridge AHP model. According to the evaluation results of the bottom index layer by layer, it is summarized to the top layer to complete the evaluation of the monitoring bridge technical status. However, due to the problem of weight distribution in this method, it is easy to cause the change of the overall evaluation result when a certain weight index is invalid, which does not accord with the actual engineering situation. In view of this, based on the Object-Oriented idea and the cable force optimization influence matrix method of cable-stayed bridge, this paper puts forward a method for evaluating the technical condition of suspension bridge based on health monitoring, and applies this method to the health assessment of Qingcaobei Yangtze River Bridge. The applicability and validity of the method are proved. The main work of this paper is as follows: 1. Through statistical analysis of the sample data of the health monitoring of the Qingcaobei Yangtze River Bridge, the main cable force, suspender pull force and main beam displacement of the Qingcaobei Yangtze River Bridge are obtained. The strain of the main beam and the strain of the cable tower vary with time, and try to peel off the temperature effect in the monitoring data. The response of each monitoring variable under vehicle load is analyzed emphatically. 2 through the research and analysis of the existing technical condition assessment method based on bridge health monitoring, an object-oriented evaluation method for the technical condition of suspension bridge is put forward. The object system of Qingcao back Yangtze River Bridge is established. The influence equation of bridge health monitoring system is derived by using the influence matrix method of cable force optimization for cable-stayed bridge. It is proved that the internal relation among the monitoring variables. 3 the "super ellipsoid" surface in m dimensional space is used as the early warning threshold of the bridge health monitoring system. Based on the health monitoring data of Qingcaobei Yangtze River Bridge, this paper presents the method and the Analytic hierarchy process (AHP) to evaluate the technical status of Qingcaobei Yangtze River Bridge. The advantages of the proposed method are analyzed.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U446;U448.25
【参考文献】
相关硕士学位论文 前1条
1 王邦进;永和大桥维修加固后的结构健康监测与模型修正[D];哈尔滨工业大学;2007年
，本文编号：2382286
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