Research into seismic retrofit of reinforced concrete bridge columns

1992 ◽  
Vol 25 (3) ◽  
pp. 203-210
Author(s):  
M. J. Nigel Priestley ◽  
Frieder Seible
Keyword(s):  
Reinforced Concrete ◽  
Concrete Columns ◽  
University Of California ◽  
Concrete Bridge ◽  
Test Results ◽  
Relevant Research ◽  
Reinforced Concrete Bridge ◽  
Extensive Test ◽  
Ductility Capacity ◽  
The University

Structural deficiencies in flexural and shear strength, and in ductility capacity of reinforced concrete columns of Californian bridges have required the development of effective and economic retrofit solutions. The paper describes relevant research at the University of California San Diego, and presents design recommendations based on rather extensive test results.

Failure Analysis of Reinforced Concrete Bridge Column Using Cohesive and Adhesive Interfaces

2006 ◽  
Vol 321-323 ◽  
pp. 716-719 ◽  
Author(s):  
In Kyu Rhee ◽  
Hee Up Lee ◽  
Jun S. Lee ◽  
Woo Kim
Keyword(s):  
Reinforced Concrete ◽  
Failure Analysis ◽  
Interfacial Crack ◽  
Concrete Columns ◽  
Crack Model ◽  
Concrete Bridge ◽  
Reinforced Concrete Columns ◽  
Reinforced Concrete Bridge ◽  
Bridge Column ◽  
The University

This study examines the performance of adhesive and cohesive interfacial crack model in assessing the brittle shear behavior of reinforced concrete bridge columns. The quarter-scale reinforced concrete columns tested at the University of California at San Diego by Xiao et al. (1993) to explore the ductility of reinforced concrete columns under cyclic loading. The three columns R-1, R-3 and R-5 with different transverse reinforcement are considered for finite element failure analysis.

SEISMIC ENHANCEMENT OF REINFORCED-CONCRETE COLUMNS BY REBAR-RESTRAINING COLLARS

2012 ◽  
Vol 06 (03) ◽  
pp. 1250015 ◽  
Author(s):  
ANAT RUANGRASSAMEE ◽  
ARCHAWIN SAWAROJ
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Concrete Columns ◽  
Bridge Columns ◽  
Concrete Bridge ◽  
Reinforcing Bars ◽  
Plastic Hinges ◽  
Reinforced Concrete Bridge ◽  
Loading Tests ◽  
Cyclic Loading Tests

When reinforced-concrete columns are subjected to lateral cyclic loading, columns usually suffer failures at plastic hinges. If the buckling of longitudinal reinforcements at plastic hinges can be prevented or delayed, columns are expected to carry gravity loads at a higher ductility level. In this study, the rebar-restraining collar (RRC) was developed to improve the post-buckling behavior of longitudinal reinforcements. The behavior was investigated under monotonic loading tests of reinforcing bars with the RRCs and the cyclic loading tests of two reinforced-concrete bridge columns with and without RRCs. From the monotonic loading test, it was found that the RRCs significantly improved the post-yielding behavior of longitudinal reinforcing bars. The ductility and energy dissipation of longitudinal reinforcing bars with RRCs was significantly higher than that of the bare bar. Then, cyclic loading tests of two reinforced-concrete bridge columns were conducted. The cross section of columns was 0.4 m × 0.4 m, and the effective height was 2.15 m. The ratio of longitudinal reinforcing bars was 0.0123, and the volumetric ratio of transverse reinforcement was 0.00424. The column with RRCs did not have buckling of longitudinal reinforcements and had the ductility enhancement of about 17%, comparing to the column without RRCs. One evident benefit of using the RRCs is to control damage at plastic hinges of columns. Hence, the repair cost of columns after an earthquake can be reduced.

Inelastic behaviour and ductility capacity of circular hollow reinforced concrete bridge piers under earthquake

2012 ◽  
Vol 64 (10) ◽  
pp. 919-930 ◽  
Author(s):  
Ju-Hyun Cheon ◽  
Tae-Hoon Kim ◽  
Byung-Ju Lee ◽  
Jae-Hoon Lee ◽  
Hyun Mock Shin
Keyword(s):  
Reinforced Concrete ◽  
Bridge Piers ◽  
Concrete Bridge ◽  
Reinforced Concrete Bridge ◽  
Inelastic Behaviour ◽  
Ductility Capacity
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