劣化預力混凝土箱型梁之診斷分析;Diagnostic Analysis of Deteriorated Prestressed Concrete Box Girder

NCU Institutional Repository > 工學院 > 土木工程研究所 > 博碩士論文 > Item 987654321/83058

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/83058

题名:	劣化預力混凝土箱型梁之診斷分析;Diagnostic Analysis of Deteriorated Prestressed Concrete Box Girder
作者:	葉曜銜;Yeh, Yao-Hsien
贡献者:	土木工程學系
关键词:	橋梁健康監測;預力損失;裂縫;自然振動頻率;Abaqus;MIDAS;bridge health monitoring;prestressed loss;crack;natural frequency;Abaqus;MIDAS
日期:	2020-08-18
上传时间:	2020-09-02 14:35:10 (UTC+8)
出版者:	國立中央大學
摘要:	對大跨徑的橋梁而言，預應力系統為重要的受力部分，橋體的變位量往往與預應力的損失有關。而預應力的損失原因除了乾縮潛變、錨定端滑移等，裂縫的擴展也可能造成預應力的損失。裂縫的生成擴展方向及速度，源自許多因素。本研究透過相關數值模擬，以及預應力混凝土梁振型模態。利用監測數據之變位曲線，再與數值模擬進行比對，透過反算分析估算出劣化箱型梁之剩餘預力。用利用估算出之現有預力值及呆載重使用裂縫擴展模擬判斷現場結構裂縫劣化主要原因。;For the long-span bridge, the prestressed system is an important part of the force, and the displacement of the bridge body is often related to the loss of prestress. In addition to shrinkage and creep, the cause of the loss of prestressing, the direction and speed of the formation and expansion of the slip crack at the anchor end are derived from many factors. In this study, the relevant numerical simulation and the vibration mode of the prestressed concrete beam are adopted. Then compare with the numerical simulation, through the inverse calculation analysis to decompose the prestressed of the extension box-girder. The crack propagation simulation is used to judge the cracks of the on-site structure by using the existing prestressed value and the dead load.
显示于类别:	[土木工程研究所] 博碩士論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	141	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....