Experimental behaviour of curvilinearised square columns confined with fiber-reinforced polymer

Pao Yue-kong Library Electronic Theses Database

Experimental behaviour of curvilinearised square columns confined with fiber-reinforced polymer

 

Author: Zhao, Wei
Title: Experimental behaviour of curvilinearised square columns confined with fiber-reinforced polymer
Degree: M.Sc.
Year: 2012
Subject: Reinforced concrete construction.
Fiber reinforced concrete.
Fiber reinforced plastics.
Hong Kong Polytechnic University -- Dissertations
Department: Dept. of Civil and Structural Engineering
Pages: ix, 83 leaves : ill. (chiefly col.) ; 30 cm.
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2554568
URI: http://theses.lib.polyu.edu.hk/handle/200/6862
Abstract: Fibre Reinforced Polymer (FRP) is experiencing a sharp increase in use in the strengthening of reinforced concrete structure. This sharp increase has been due to the excellent properties of FRP composites including high specific strength, stiffness, ductility, as well as ease of application. It is well known that concrete can achieve higher strength and greater ductility when subjected to triaxial compression. Based on this mechanism, FRP wraps have been widely used to externally confine concrete columns (particularly those with inadequate existing internal transverse reinforcement) to enhance their strength and ductiluty. A large number of studies have demonstrated that FRP composite jackets provide effective lateral confinement for concrete columns with a circular section, but their confinement is much less effective in concrete columns with square and rectangular cross-sections. The curvilinearisation method has recently been proposed to solve this problem, in which the straight sides of the cross-section are modified into shallow arcs. However, there has been very limited work on the effect of section curvilinearisation on the behaviour of FRP-confined concrete columns. To address this deficiency, the present thesis presents an experimental study into the effectiveness of FRP confinement in curvilinearised square columns. A total of 14 FRP-confined specimens were prepared and tested under axial compression. The specimens (including 2 trial tests) included circular columns and curvilinearised square columns with rise-to-span ratios of 1/10, 1/15 and 1/20. The test data are presented and discussed. The failure modes and the corresponding stress-strain curves are given. Besides, the test results are compared with theoretical predictions of representative models for FRP-confined curvilinearised columns and circular columns.

Files in this item

Files Size Format
b25545681.pdf 3.304Mb PDF
Copyright Undertaking
As a bona fide Library user, I declare that:
  1. I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
  2. I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
  3. I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.

     

Quick Search

Browse

More Information