路面结构动力响应信息初步监测及分析.pdf.doc.doc
《路面结构动力响应信息初步监测及分析.pdf.doc.doc》由会员分享,可在线阅读,更多相关《路面结构动力响应信息初步监测及分析.pdf.doc.doc(103页珍藏版)》请在三一文库上搜索。
1、 中国图书分类号: U416.2国际图书分类号: 625.7学校代码:10213密级:公开工学硕士学位论文路面结构动力响应信息初步监测及分析硕士研究生:孙宗杰导师:董泽蛟副教授申请学位:工学硕士学科、专业:道路与铁道工程所在单位:交通科学与工程学院答辩日期: 2011年 6月授予学位单位:哈尔滨工业大学 Classified Index: U416.2U.D.C.: 625.7Dissertation for the Masteral Degree in EngineeringINITIAL MONITORING AND ANALYSIS ONDYNAMIC RESPONSE OF PAVEM
2、ENTSTRUCTURECandidate:Sun Zongjie Supervisor:Ass.Prof. Dong ZejiaoMaster of EngineeringHighway and Railway EngineeringAcademic Degree Applied for:Specialty:Affiliation: School of Transportation Science and Engineering June, 2011Date of Defence:Degree-Conferring-Institution: Harbin Institute of Techn
3、ology 摘要摘 要传统的路面结构响应测试难以获取路面在车辆荷载与环境因素耦合作用下的实际受力状况,无法为沥青路面的结构设计方法以及路用性能评价提供数据支撑。而实现路面结构信息的适时采集、处理与分析,不仅能够验证路面结构设计与计算的结果,保证设计与实体工程的统一,而且还可以分析出沥青路面结构内部响应衰变规律,澄清沥青路面损坏机理,预估路面使用寿命,进而提出合理的路面养护方案。为此,本文针对路面结构常见的病害形式,分析确定不同损坏类型的特点、评价指标及关键位置,进行基于光纤传感技术的路面动力响应信息监测系统设计与实施。而后,根据目前的工作进展,针对路面疲劳开裂,结合室内材料疲劳性能评价,进行实
4、际路面疲劳寿命预估的初步研究。首先,进行沥青路面典型结构动力响应监测系统设计、现场实施以及数据规律的初步分析。分析路面常见损坏现象的原因及特点,结合沥青路面设计与评价方法的研究,确定影响路面结构监测的关键部位和测试指标;针对不同类型传感器的工作原理、用途以及待埋设部位,进行传感器的埋设工艺研究,实施监测系统设计以及部分布设工作;进行部分路面结构现场响应实测结果的初步分析,分析不同车速、不同车重以及不同路面结构层位处的路面响应规律。其次,基于室内小尺寸试验进行不同测试手段应变测试结果的比对与分析。基于应变片与传感器测试原理与影响因素分析,开发电阻式应变片在车辙试件中的埋设工艺,完成基于应变片与光
5、纤传感器两种不同测试技术手段的车辙试验,建立两种测试方式的回归关系;借助室内小梁试件三点弯曲试验方法,将电阻式应变片测试的梁底弯拉应变信息与理论应变进行对比,建立传感器测试结果的标定公式。最后,针对沥青路面疲劳损坏问题,进行基于路面结构内部模量衰减信息的路面疲劳寿命初步研究。开展室内三点弯曲疲劳试验,建立路面材料疲劳方程,结合路面动力响应实测信息,给出试验路段路面疲劳寿命预估方法。关键词:沥青路面;动力响应;监测系统;疲劳分析I AbstractAbstractThe traditional tests for pavement structural response are difficul
6、t to obtaininformation of actual mechanical condition under vehicle load coupled withenvironmental factors, so it cant help for pavement structural design and evaluating topavement performance. On the contrary, achieving timely collection and analysis ofinternal information of pavement structure is
7、used not only to verify the pavementstructural design and calculation to ensure the unity of design and physical construction,but also analyzing the structure response of asphalt pavement that is help for clarifyingthe damage mechanism of the asphalt pavement and estimating life of pavement, then ar
8、easonable road maintenance program would be made.As a result, it analyzed the characteristics, evaluation parameters and key position ofpavement distress, then a monitoring system for the dynamic response of pavement wasdesigned and implemented partly, that was based on fiber Bragg grating sensingte
9、chnology. At the same time, fatigue performance of materials in laboratory was studiedhere to predict fatigue life of actual pavement based on the current progress of the work.Firstly, it carried out design, implementation and preliminary analysis for the data ofpavement structural dynamic response
10、monitoring system. Based on analyzing reasonsand common characteristics of pavement distress, the important positions and parametersof road were determined for the system. Then some sensors of the system was selectedand buried in the road according to work, use methods and position of the sensors.Wh
11、ats more, the results of pavement structure response information on-site, which fromdifferent speeds, different weights and different layers of pavement, has been preliminaryanalyzed.Secondly, aiming at calibrating the sensors, strains from different tests wereobtained and analyzed based on small-sc
12、ale test. It developed buried methods that usingresistive strain gauge and fiber Bragg grating sensor in a rutting specimen according totheir testing theories and affecting factors. Then the regression relationship between themwas built. At the same time, it compared test strain with theory strain o
13、f beam in thethree-point bend test in order to calibrate the gauge. Based on the above two steps, thecalibration formula of information from fiber Bragg grating sensors was established.Finally, preliminary study on fatigue life of pavement structure against fatigueII Abstractdamage of asphalt paveme
14、nt, which based on the level of strain, was carried out. At thesame time, fatigue equation was established, and the prediction method of fatigue lifewas also given based on three-point bending fatigue test according to the dynamicresponse information of the road.Keywords: asphalt pavement; dynamic r
15、esponse; monitoring system; fatigueanalysisIII 哈尔滨工业大学工学硕士学位论文目录 摘要 . IAbstract.II第1章绪论 . 11.1课题背景及意义 . 11.1.1研究背景. 11.1.2研究目的与意义. 11.2国内外研究现状 . 21.2.1路面结构动力响应测试综述. 21.2.2光纤光栅技术在沥青路面测试中的应用. 181.3课题来源及主要研究内容. 201.3.1课题来源. 201.3.2主要研究内容. 201.3.3主要技术路线. 21第2章沥青路面结构动力响应监测系统. 232.1 沥青路面损坏类型及评价指标分析. 232.1
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 路面 结构 动力 响应 信息 初步 监测 分析 pdf doc
链接地址:https://www.31doc.com/p-2037538.html