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[sudarshan_mandawat]

Dear all,

The subject" Repair and retterofitting of concrete bridge structure'' is my seminar topic in my M.E in Structure. I have completed almost my litrature write up but i cannot find Recent CASE STUDIES, Condition analysis, Analysis of bond between old and new work , design for new work, earthquake effect on bridge before and after, etc.. please any one can help me?

[B.V.Harsoda]

SEISMIC DESIGN AND RETROFIT OF BRIDGES

Kazuhiko KAWASHIMA

1

SUMMARY

The 1989 Loma Prieta, 1994 Northridge and 1995 Hyogo-ken nanbu earthquakes caused major

damage to bridges and these events together with the research triggered as a consequence of the

earthquakes has led to significant advances in bridge seismic design and retrofitting. This paper

presents how this has affected design philosophies and design codes in EC, New Zealand, Japan

and USA in recent years, with emphasis on the Japanese experience in the aftermath of the 1995

H-k-n earthquake. Near field ground motion, linear/nonlinear static/dynamic response analyses,

treatment of liquefaction-induced lateral ground movement are described. Comparison of design

philosophy, design force and ductility requirements are compared among the EC-8, New Zealand,

Japanese, AASHTO and Caltrans/ATC-32 codes. Seismic retrofitting which was conducted in

Japan after the Hyogo-ken nanbu earthquake over 29,000 reinforced concrete columns is

described.

Source link:-
http://www.iitk.ac.in/nicee/wcee/article/2828.pdf

[B.V.Harsoda]

Refer below links:-

http://www.sefindia.org/forum/viewtopic.php?p=48225#48225

http://www.sefindia.org/forum/viewtopic.php?t=11671&postdays=0&postorder=asc&start=40

[B.V.Harsoda]

Seismic lessons  learned:-
PPT

Link:-
http://mceer.buffalo.edu/research/HighwayPrj/Workshops/Charleston/02Yen.pdf

[B.V.Harsoda]

Seismic Design and Retrofit Detailing Fundamentals PPT
Reggie DesRoches, Professor of Engineering, Georgia Institute of Technology University DesRoches provides essential information on Support Length Details & Requirements; Capacity Protection Philosophy and Details ; Detailing for Ductility (laps, confinement); Earthquake resisting Systems (ERS); and Typical Retrofit Details.

Source Link:-
http://mceer.buffalo.edu/research/HighwayPrj/Workshops/Charleston/07DesRoches.pdf

[B.V.Harsoda]

Case Study: Retrofitting Large Bridge Piers on the Nakdong River, South Korea

S. K. Park, M.ASCE

1; P. Y. Julien, M.ASCE2; U. Ji3; and J. F. Ruff, F.ASCE4

Abstract:

The Gupo Bridge crosses the Nakdong River near the city of Busan, South Korea. During Typhoon Maemi in 2003, the old

Gupo Bridge collapsed due to excessive pier scour. More recently, the highway construction on the left-bank floodplain required rightbank

channel widening to restore the channel flood-carrying capacity. This 7 m deep floodplain excavation is expected to cause significant

local scour around the 8–10 m wide and 3 m thick spread footings of Piers 11 and 12 of the Subway Bridge and Piers 15 and 16 of the

Gupo Bridge. Three design options are examined for retrofitting floodplain bridge piers with massive spread footings. A solution with

sheet piles and riprap was recommended in 2006 as the most appropriate design, but Plan III with a conical riprap structure around the

footings was ultimately constructed in 2007 for economic reasons. Laboratory experiments also highlight the need to place gravel and

synthetic filters under the designed riprap.

Source Link:-
http://www.engr.colostate.edu/~pierre/ce_old/Projects/Paperspdf/Park-Julien-Ji-Ruff-08.pdf

[michellemacdroff]

Actually, I don't have much idea about it. But I can suggest you to go through the internet and get the best answer.
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