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名古屋工業大学大学院社会工学專攻 研究室 Durability Evaluation Durability Evaluation of of Existing Reinforced Concrete Structures Existing Reinforced Concrete Structures Wei-Qiu Zhong Wei-Qiu Zhong , , Ying-Chun Ying-Chun Jiang iang and and Yan-Gang Yan-Gang Zhao Zhao System reliability analysis for R.C. structures under the attack of several corrosive factors, such as carbon dioxide, chloride ions, sulfate, and sulfuric acid 0 0.1 0.2 0.3 0.4 0.5 0.6 0 20 40 60 Service Period (years) System Failure Probability Upper Bound Lower Bound Variable weight model for comprehensive quality evaluation of existing R.C. structures ! = = m j j ij j ij ij x x x x w 1 * * / / ) (1 1 , : min 1 p i K k ë ì k k k r ir i ! ! " # $ % & ! ! ( = ) = Grey system method for predicting remaining service life of existing R.C. structures Performance experiments of R.C. columns with corroded rebar Further Research Aspects Zhao Lab. of Structural Safety , Nagoya Institute of Technology Accelerated electrochemical corrosion of rebar A practical and efficient algorithm to calculate skeleton curves of reinforced concrete members with corroded rebar is presented. Models and expressions of the influence of corrosion extent on anti-seismic performance and reliability of R.C. structures Models and expressions of the influence of corrosion extent on anti-fatigue performance and reliability of R.C. structures Bearing capacity, rigidity, ductility and energy dissipation characteristics of members are analyzed. The goal of structural design is to ensure appropriate safety, serviceability, durability and economy of structures. Durability evaluation of existing R.C. structures is an important part of research on durability of R.C. structures. 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0 10 20 30 40 50 60 Service Period (years) Structural Damage Index Predicted Given a u e a u x k x ak + ! = + ! ] ) 1 ( [ ) 1 ( ˆ ) 0 ( ) 1 ( ) ( ˆ ) 1 ( ˆ ) 1 ( ˆ ) 1 ( ) 1 ( ) 0 ( k x k x k x ! + = + Dynamic performance and reliability of R.C. structures in corrosive environment

Durability Evaluation of Existing Reinforced …...Durability Evaluation of Existing Reinforced Concrete Structures Wei-Qiu Zhong, Ying-Chun Jiang and Yan-Gang Zhao System reliability

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名古屋工業大学大学院社会工学專攻                 趙  研究室

Durability Evaluation Durability Evaluation of of Existing Reinforced Concrete StructuresExisting Reinforced Concrete StructuresWei-Qiu ZhongWei-Qiu Zhong, , Ying-Chun Ying-Chun JJiangiang and and Yan-GangYan-Gang ZhaoZhao

System reliability analysis for R.C.structures under the attack of severalcorrosive factors, such as carbondioxide, chloride ions, sulfate, andsulfuric acid

0

0.1

0.2

0.3

0.4

0.5

0.6

0 20 40 60

Service Period (years)

Syste

m F

ail

ure P

robabil

ity Upper Bound

Lower Bound

Variable weight model for comprehensive qualityevaluation of existing R.C. structures!

=

=m

j

jij

jij

ij

xx

xxw

1

*

*

/

/

)(11,:min1

piKkëìkkk

r

iri !!"#$

%&'

!!(= )=

Grey system method for predictingremaining service life of existingR.C. structures

Performance experiments of R.C.columns with corroded rebar

Further Research Aspects

Zhao Lab. of Structural Safety , Nagoya Institute of Technology

Accelerated electrochemicalcorrosion of rebar

A practical and efficient algorithm tocalculate skeleton curves of reinforcedconcrete members with corroded rebar ispresented.

Models and expressions of the influence of corrosion extent onanti-seismic performance and reliability of R.C. structures

Models and expressions of the influence of corrosion extent onanti-fatigue performance and reliability of R.C. structures

Bearing capacity, rigidity,ductility and energydissipation characteristicsof members are analyzed.

The goal of structural design is to ensure appropriatesafety, serviceability, durability and economy ofstructures. Durability evaluation of existing R.C.structures is an important part of research ondurability of R.C. structures.

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

0 10 20 30 40 50 60

Service Period (years)

Str

uctu

ral

Dam

age I

ndex Predicted

Givena

ue

a

uxkx

ak+!=+

!])1([)1(ˆ )0()1(

)(ˆ)1(ˆ)1(ˆ )1()1()0(kxkxkx !+=+

Dynamic performance and reliability of R.C. structures in corrosive environment