Objective
The drying shrinkage of the aggregate itself
increases the shrinkage of concrete. In fact, the recent report indicates that
the aggregate caused severe damage of an existing concrete structure through
cracks in
Technical Committee on Shrinkage Effect
Evaluation based on Durability Mechanics (JCI-TC-105A) has been established to
study the shrinkage problem based on the durability mechanics. Here, the
durability mechanics is a new concept re-defined as one of the academic
disciplines of Engineering Mechanics for the systematic prediction and
evaluation of time-dependent behavior of concrete materials and structures, by
the Working Group on Durability Mechanics (WG3) within Technical Committee on
Time Dependent Behavior of Cement-Based Materials (JCI-TC-061A).
Firstly, 1) the mechanism of shrinkage of concrete and its physical modeling and 2) shrinkage-induced stress and resultant cracking in concrete structures, as well as their effect on the structural and durability performance will be categorized and discussed. Then, 3) Modeling and coding of structural and durability performance of concrete structures based on the results of 1) and 2) will be discussed and make an proposal for the general design codes for effect of shrinkage.
Former committee activity
Members
Board member
|
Committee chairperson |
R, Sato (Hiroshima Univ.) |
|
Vice-chairman of a committee and WG1 chairman |
T. Shimomura (Nagaoka Univ.) |
|
WG2 chairman |
I. Ujike (Ehime Univ.) |
|
Vice-WG1 chairman |
T. Komuro (Taisei Co.) |
|
Vice-WG2 chairman |
T. Ishida (The Univ. of Tokyo) |
|
General manager |
I. Maruyama (Nagoya Univ.) |
Committee member
K. Imamoto (Tokyo Univ. of Sci.) |
T. Oyamoto (Kajima Co.) |
M. Kanematsu (Tokyo Univ. of Sci.) |
T. Fukuhara (Takenaka Co.) |
K. Kobayashi (East Japan Railway Company) |
T. Saeki (Niigata Univ.) |
Y. Sato (Hokkaido Univ.) |
N. Takahashi (The Univ. of Tokyo) |
T. Hasegawa (Shimizu Co.) |
H. Nakamura (Nagoya Univ.) |
M. Maruta (Shimane Univ.) |
K. Hayashi (Yokohama National Univ.) |
T. Miki (Kove Univ.) |
T. Maruya (Taisei Co.) |
S. Miyazawa (Ashikaga Institute of Tech.) |
T. Mizobuchi (Hosei Univ.) |
Y. Taira (Sumitomo mitsui construction Co., Ltd.) |
H. Hyodo (Taiheiyo Co.) |
T. Yamaji (Port and Airport Research Institute) |
|
Cooporation committee member
M. Tanimura (Taiheiyo Co.) |
M. Suzuki (P. S. Mitsubishi Construction Co., Ltd.) |
N. Chijiwa (The Univ. of Tokyo) |
Y. Aoki (Kisarazu National College of Techinology) |
A. Hosoda (Yokohama National Univ.) |
K. Teranishi (Meijyo Univ.) |
Y. Suzuki (East Japan Railway Company) |
|
Activities
Apr. 30, 2010 Board member meeting.
Jul. 8, 2010 Board member meeting.
Jul. 9, 2010 General meeting. (in Oomiya)
Sep. 1, 2010 Voluntary meeting. (in Sapporo)
Dec. 8, 2010 WG1 & 2 meetings. (in JCI)
Dec. 27, 2010 Board meeting. (in JCI)
Jan. 28, 2011 Board meeting. (in Hiroshima)
Mar. Mar. 7, 2011 WG1 & 2 meetings. (in JCI)
JCI Workshop : Technical Committee on Shrinkage Effect Evaluation based on Durability Mechanics
Coming Aug. 1, 2011, Workshop on the effect of shrinkage on the performance of concrete structures based on the durability mechanics will be held in Tokyo.
Keynote lecture 1
Introduction of Nano-scale Fracture Model and General Applicability of Chemical Energy Conservation Law
By Tada-aki TANABE,? Yasuaki ISHIKAWA
Keynote lecture 2
Long and Short-term Behavioral Simulation of RC-PC Infrastructures based on the Multi-scale Hygro-Thermodynamics
By Koichi MAEKAWA and Motohiro OHNO
Invited paper
High Performance Capability of Reinforced Concrete Members By Using Expansive Concretes
By? Yukikazu TSUJI and Kentaro SUHARA
General contributions
1 Study on Characterization for Dry Shrinkage of Harden Highstrength Concrete from aterabsorption Test Results
By Goro SHIMIZU，Hideki KUBOTA and Yoshihisa NAKATA
2 Study on a Evaluation Method for Autogenous Shrinkage of Concrete Cured on Previous High Temperature History
By Takeshi OHTOMO, Tatsuya USUI and Shigeyoshi MIYAHARA
3 Resistance against Shrinkage Cracking for Cement Based Materials under Pseudo Perfect Restraint
By Minoru KUNIEDA, Kosuke SHIMIZU, Ippei MARUYAMA, Naoshi UEDA and Hikaru NAKAMURA
4 Effect of Shrinkage on Tensile Properties in Reinforced Concrete Members with Ultra-High Strength Materials
By Yukihiro SATO, Masaru TERAOKA and Naoki TAKAMORI
5 Effect of material property of slag cement on thermal cracking of an actual structure
By Satoshi KOMATSU, Yuto OHNO, Akira HOSODA, Kazuhiko HAYASHI and Kazuhiro TSUNO
6 Influence of Drying Shrinkage on Lowering of Mass Transfer Resistivity? of Cover Concrete by Internal Cracking
By Isao UJIKE, Shin-ichro OKAZAKI, Masanobu MURAKAMI and Takuya MORIOKA
7 Re-evaluation of building engineering researches from shrinkage related durability mechanics
By Ippei MARUYAMA, Tsutomu KOMURO, Makoto MARUTA, Noriyuki TAKAHASHI and Takeshi FUKUHARA
8 Investigation and Examination of Damage Conditions of Reinforced Concrete Structures Due to Self-Strain-Stresses and Assessment of Influence of? such Damages on Structural Performance
By Masaru TERAOKA and Satoshi KAKE
9 Consideration on Structural Experiment of Large Scale Ultra High Strength RC Column
By Tsutomu KOMURO, Susumu KONO and Norio SUZUKI
10 Study on Drying Shrinkage Properties of Reinforced Concrete Slabs on Rigid Frame Viaducts
By Takehiro SUZUKI and Kaoru KOBAYASHI
11 Experimental study of the reuse of waste fresh concrete as a preceding mortar for concrete pumping constructions
By Masafumi WATANABE，Yoshihisa NAKATA，Masanori KAWANOBE，Hajime TAKANO， Hideaki ONAYA and Takeshi SAITO
12 Shear capacity of RC beams damaged by drying shrinkage
By Kenichiro NAKARAI, Masaki EHARA and Shigemitsu MORITO
13 Effect of Concrete Shrinkage on Shear Tension Strength of Reinforced Concrete Beams
By Hikotsugu HYODO，Takahiro MITANI，Koki OTA，Hiroki NAKAYAMA and Ryoichi SATO