| 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: | Department of Civil and Structural Engineering |
| Pages: | ix, 83 leaves : ill. (chiefly col.) ; 30 cm. |
| Language: | English |
| 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. |
| Rights: | All rights reserved |
| Access: | restricted access |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| b25545681.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 3.23 MB | Adobe PDF | View/Open |
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