【作者】 石鹏程；

【导师】 顾安邦； 张雪松；

【作者基本信息】 重庆交通大学 ， 结构工程， 2009， 硕士

【摘要】 随着国民经济的发展和桥梁设计理论的不断完善,桥梁建设跨径不断增大,结构更加复杂,造型日益美观,但潜在隐患也随之加大。因此,对大型桥梁的监测和评估工作显得尤为必要和紧迫。目前,对大型桥梁健康监测和评估的研究还处于试验阶段,如何在经济和技术允许的条件下,合理评价大型桥梁的服役状态,是一项迫切而意义重大的课题。本文以大跨径预应力混凝土连续刚构桥健康监测评估系统为研究重点,以渝澳大桥轻轨桥主桥为工程背景,参考已建的桥梁监测系统,研究一套经济实用的大跨径预应力混凝土连续刚构桥评估系统软件。主要内容为:①在借鉴当前国内外桥梁健康监测以及评估理论的基础上,用变权原理的层次分析法建立了大跨径预应力混凝土连续刚构桥健康监测评估指标体系和多层次递阶关系模型,提出了大桥服役状态的综合评估方法,并给出了各层次指标的权重。②对裂缝、固有模态特征频率的评估进行了分析,得到了相应的评估标准。③介绍了大跨径预应力混凝土连续刚构桥健康监测评估参数的选择原则、测试方法,提出了合理的测点布设方案,实现了桥梁的在线评估。④研究了底层指标权重的计算方法,找到了一种脱离人为主观因素相对稳定构造应力和挠度测点权重判断矩阵的方法。⑤以C++语言编制算法程序,采用VisualC++.NET为服务器端开发平台,以.net FrameWork2.0为客户端框架,运用SQLServer2005数据库,初步开发了大跨径预应力混凝土连续刚构桥综合评估系统软件,为同类型桥梁评估软件的开发提供了参考和依据。更多还原

【Abstract】 With the development of national economy and the unceasing consummation of bridge design theory,the bridge construction span increases unceasingly,the structure is more complex and the modeling is artistic day by day, but the latent danger is also increasing along with it. Therefore, the work of monitoring and the assessing large bridge is especially necessary and urgent. At present, health research is also at the testing stage to monitor and assess the large bridge. Under the economical and technical permission’s condition, how to reasonably assess service condition of large-scale bridge is a urgent and significance significant topic.This article takes health monitoring and assessment system of long span prestressed concrete continuous rigid-frame bridge as a research key. It takes the main bridge of Yuao light rail as the project background, referencing constructed bridge monitoring system, studying a set of economical practical software system on long span prestressed concrete continuous rigid-frame bridge .The primary content is as follows.①Referenced current domestic and foreign bridge health monitoring as well as the appraisal theory, the long span prestressed concrete continuous rigid-frame bridge indicator system and the multi-level hierarchical relational models by analytic hierarchy process under variable weights principle are established, also the comprehensive assessment method of bridge service condition is proposed, and various levels indicator weights are given too.②The assessment of crack and inherent modality eigen frequency is carried on the analysis,and the corresponding appraisal standard is obtained.③The health monitoring appraisal parameter selection principle and the test method of long span prestressed concrete continuous rigid-frame bridge are introduced, and the reasonable layout scheme of measuring points is proposed, also the bridge online appraisal is realized.④The first floor indicator weights computational method is studied, and a relative stable method to build stress and the judgment matrix of deflection measured points weights which has been separated from artificial subjective factor is found.⑤According to algorithmic program By C++ language, using VisualC++.NET as the development platform of server end, taking .net FrameWork2.0 as the customer end frame, also using SQLServer2005 database, the long span prestressed concrete continuous rigid-frame bridge comprehensive assessment system software initially is developed, which provids the reference and the basis for developing assessment software of the same type bridge.更多还原