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Research on Detection & Reinforcement and Load Test of CFST Arch-Bridge

Author: LiuZuo
Tutor: LiLiFeng；YangShaoJing
School: Hunan University
Course: Architecture and Civil Engineering
Keywords: CFST arch-bridge detection stability maintenance and reinforcing static and dynamic load test
CLC: U448.22
Type: Master's thesis
Year: 2008
Downloads: 258
Quote: 2
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Abstract


In the last decade,due to insufficiency of necessary daily maintenance and repair,along with the aging of the bridge, increasing traffic and environmental change,many diseases have occurred to CFST arch-bridge, some even affecting the normal use of the bridge.Moreover, there are still a lot of issues to be resolved in design theory of CFST arch-bridge. So it’s necessary to make study on the pathological analyses and remedial measures for CFST arch-bridge. This paper has made some primary work on this field based on the practice of detecting and reinforcing of Guangxi Liujing Yujiang River CFST arch-Bridge. The author hopes this study will make some contribution to later research work on CFST arch-bridge.Based on the detection and reinforcement methods used at home and abroad, this paper has studied the detection methods for CFST arch-bridge with reference to practice work performed on Guangxi Liujing Yujiang River CFST arch-Bridge. Especially, the methods which are used to detect the density of concrete filled in the arch of CFST arch bridge are summarized and analyzed. The test data from aforementioned bridge are analyzed to identify the causes of the disease,which could be a basis for later maintenance and reinforcing.Then, according to the analysis results, the reinforcing methods are designed and a detailed reinforcing and maintenance program are developed.Take LiuJing Bridge as an example, ANSYS is used to analyze the stability, according to two situations: good bond and concrete separate away from steel tube. It is proved that concrete separate away from steel tube can reduce the stability and bearing capacity, furthermore, the influence of concrete separate away from steel tube varied in different load conditions. Because of bad effect, we should attach importance to and take corresponding measures to reduce even avoid that.Finally , the contents and methods on CFST arch bridge load test are summarized, and the calculating theoretics for load test are studied .Meanwhile, in order to check the efficiency of the reinforcing,load test has been performed, which show that the expected goals have been achieved.A set of detection, maintenance and reinforcing methods for CFST arch-bridge was proposed in this paper, which could be much practically valuable and be a reference for later study in this field.

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CLC: > Transportation > Road transport > Bridges and Culverts > All kinds of bridges > Bridge: Structure > Arch bridge
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