Numerical simulation of FRP strenghtned RC structures 2) seimic analysis of rehabilitated buried pipelines

FRP加固RC结构数值模拟2）埋地管道修复抗震分析

• 批准号: 250157-2006
• 负责人: Ghrib, Faouzi
• 金额: $ 1.17万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=366122
• 关键词: Numerical; simulation; FRP; strenghtned; RC

This research focuses on the development of simulation tools for rehabilitated structures. Two separate projects will be developed: the first project concerns the rehabilitation of concrete structures using Fiber Reinforced Polymers (FRP) and the second deals with the seismic performance of pipelines rehabilitated using trenchless technology. 1) Project 1: The strengthening of concrete structures by means of externally-bonded fiber reinforced polymers is now accepted as a viable alternative to the costly radical solution of replacing the structure. Experimental investigations have proved the efficiency of this strengthening technology to enhance the strength of structures. However, the failure of FRP-strengthened concrete structures under ultimate loading conditions is often dangerously brittle and without any warning. The structural response of the system is controlled by the behaviour of the interface between the FRP and concrete. This project aims at developing a simulation tool for FRP-concrete interfaces. It will contribute to better understand the stress transfer in the rehabilitated concrete structure and improve the design process. 2) Project 2: The second project focuses on the seismic performance of rehabilitated pipelines. Like any structure, pipelines accumulate damage due to aging and many other factors. One of the economical techniques for retrofitting those infrastructures consists of inserting a sleeve within the pipe in the region where damage is concentrated. This technology is known as trenchless rehabilitation. This research will be undertaken to answer the following question: What is the expected structural response of the pipeline after rehabilitation intervention? The objective here is primarily to develop an analysis tool for this complex problem. The socio-economical impact of this project is evident especially for earthquake prone regions in the world.

这项研究重点是开发用于修复结构的模拟工具。将开发两个单独的项目：第一个项目涉及使用纤维增强聚合物（FRP）修复混凝土结构，第二个项目与使用Trencheless Technology修复的管道恢复的地震性能。 1）项目1：通过外部粘结的纤维增强聚合物来增强混凝土结构，现在被接受为替代结构的昂贵根本解决方案的可行替代方案。实验研究证明了这项加强技术的效率，以增强结构的强度。但是，在最终负载条件下，FRP强化混凝土结构的失败通常是危险的脆弱，没有任何警告。系统的结构响应受FRP和混凝土之间界面的行为控制。该项目旨在为FRP - 凝结界面开发模拟工具。它将有助于更好地了解修复的混凝土结构中的压力转移并改善设计过程。 2）项目2：第二个项目着重于修复管道的地震性能。像任何结构一样，管道会由于衰老和许多其他因素而累积损害。翻新这些基础设施的经济技术之一是将袖子插入损坏的区域中的管道中。这项技术被称为无风度康复。这项研究将进行回答以下问题：康复干预后管道的预期结构反应是什么？这里的目的主要是为这个复杂问题开发分析工具。该项目的社会经济影响显而易见，尤其是对于世界上俯卧的地区。