All issues
Predecessor
Volume 46, Issue 2
Displaying 1-10 of 10 articles from this issue
- |<
- <
- 1
- >
- >|
-
M. Ohtsu2008 Volume 46 Issue 2 Pages 5-11
Published: February 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSFor nondestructive evaluation (NDE) of concrete structures, elastic-wave methods have been extensively applied. Based on theoretical aspects of elastic waves, Lamb's problem for the impact-echo and the generalized theory of acoustic emission (AE) are discussed. In order to demonstrate the applicability of elastodynamics in concrete, experimental and analytical results on Lamb' problem and synthesized AE waves are demonstrated. Then, updated results on SIBIE (Stack Imaging of spectral amplitudes Based on Impact Echo) applied to detection of an ungrouted duct in prestressed concrete, and those on SiGMA (Simplified Green's functions for Moment tensor Analysis) for identifying the process of diagonalshear failure in reinforced concrete by AE are presented.View full abstractDownload PDF (19694K) -
T. Kishi, I. Kurashige, Y. Matsuda2008 Volume 46 Issue 2 Pages 12-17
Published: February 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe historical concrete structures regarded as heritage of infrastructures prove its high durability accompanied by good quality of concrete cover. On the other hand, some of concrete structures constructed recently by the rationalized construction method show the relatively earlier deterioration. However, it is not quantitatively recognized how different their qualities of cover concrete are. Thus, it is of our concern to quantitatively detect the actual quality of cover concrete in various existing structures and compare them in terms of barrier performance to corrosion of reinforcement. On this line JSCE TC335 in Concrete committee has widely conducted field surveys for various types and aged structures and its activities are briefly introduced.View full abstractDownload PDF (22065K) -
Y. Tanimura, M. Sogabe, M. Okamoto, H. Ueda2008 Volume 46 Issue 2 Pages 18-23
Published: February 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe Model Code for Maintenance of Railway Structures, which provides the standard method of maintenance of railway structures, has been established in January 2007. All railway companies can maintain the structures appropriately by applying this code. It has been published dividing into the kind of the structure because there are various kinds of railway structures, and the concrete structures version is the one. This paper describes the summary of the Model Code for Maintenance of Concrete Railway Structures.View full abstractDownload PDF (1142K) -
A. Maegawa, S. Hatanaka, N. Mishima, Y. Yuasa2008 Volume 46 Issue 2 Pages 24-32
Published: February 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSPorous concrete is environmentally friendly material that has continuous voids inside to be used widely in various fields. The performance of porous concrete is largely determined by the size and quantity of the internal pores, and pore size is controlled and adjusted by the aggregate grain diameter used as well as the volume of bonding material. However, according to the past papers, most of studies on the porous concrete, the aggregate of the particle size 2-20 mm has been used. Therefore, in this study, to expand the usage of porous concrete, manufacturing method and fundamental properties of porous concrete with small (particle size : 0.6-2.5 mm) to large (particle size : 40-400 mm) size aggregates have been examined. In this report, manufacturing method of large particle size porous concrete and applicability as fishing bank were introduced.View full abstractDownload PDF (35641K) -
M. Iwanami, H. Yokota, K. Terauchi2008 Volume 46 Issue 2 Pages 33-40
Published: February 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe authors proposed an idea of “replaceable” slab for open-type piled piers to simplify maintenance work such as inspection, repair and renovation, resulting in reduction of life cycle costs of the piers. In this study, new beam-slab joint systems were proposed to realize the replaceable slab based on results of loading tests on models of beam-slab structures.View full abstractDownload PDF (31137K) -
T. Tamakoshi, T. Takeda, Y. Hiratsuka, A. Oohashi2008 Volume 46 Issue 2 Pages 41-48
Published: February 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSRecently, it is increasing that the application examples of epoxy resin painting reinforcing rod. However, an epoxy resin painting reinforcing rod has not been used usually so far, and it has few data about the long-term durability. Therefore it become a problem to make clear the durability of an epoxy resin painting reinforcing rod, and to establish the evaluation technique. From these backgrounds, we carried out a fatigue test of an epoxy resin painting reinforcing rod. This document gathered this result.View full abstractDownload PDF (39997K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]2008 Volume 46 Issue 2 Pages 50-56
Published: February 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESS -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]2008 Volume 46 Issue 2 Pages 57-62
Published: February 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESS -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]2008 Volume 46 Issue 2 Pages 63-70
Published: February 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESS -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]2008 Volume 46 Issue 2 Pages 71-76
Published: February 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESS
- |<
- <
- 1
- >
- >|