| Project/Area Number |
05650430
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
土木材料・力学一般
|
|---|
| Research Institution | Nagaoka University of Technology |
|---|
Principal Investigator |
MARUYAMA Teruhiko Nagaoka Univ.of Tech., Eng., Professor, 工学部, 教授 (30016646)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
TAKAHASHI Osamu Nagaoka Univ.of Tech., Eng., Research associate, 工学部・, 助手 (60236263)
|
|---|
| Project Period (FY) |
1993 – 1994
|
| Project Status |
Completed (Fiscal Year 1994)
|
| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1994: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1993: ¥1,800,000 (Direct Cost: ¥1,800,000)
|
|---|
| Keywords | Buried joint / Honeycomb sell / Asphalt mixture / Strain dispersion / 格子パネル |
|---|
| Research Abstract |
The objectives of this research were (1) to obtain the basic knowledge of applying Hexalock type buried joint, which was developed for short or middle spanned girders, to much longer spanned bridges, and (2) to discuss important matters concerned with making a rational design method.So, fundamental characteristics of Hexalock type buried joint were eveluated by doing field measurements, laboratory experiments and theoretical considerations, and mechanical characteristics of each materials which constitutes the buried joint were also investigated. This research results is summarized as follows ;
1. Long term girder behavior of expansion-and-contraction is a kind of periodical change such as the combination of one day periodical change and one year periodical change.
2. To disperse girder deformation caused by thermal expansion-and contraction into whole asphalt pavement of buried joint is most important in this type buried joint. Steel grid panel and sliding sheets are connected closely and contribute toward the dispersion effect.
3. There is a friction which prevents deformation from dispersing between sliding sheets. Length of sliding part is longer, the influence of friction is more serious. When it comes to design, the influence of friction has to be taken into account for decision of sliding part length.
4. The grid panel produce good effects on asphalt mixture : (1) improving stiffness (2) being insensitive to temperature. In case of applying the buried joint to long spanned bridge, these effects have to be most remarkable point.
|
