2004 Fiscal Year Final Research Report Summary
Development of numerical analysis method for high precise prediction of wooden frames subjected to strong ground motion
| Project/Area Number |
14550568
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Building structures/materials
|
|---|
| Research Institution | Kyoto Institute of Technology |
|---|
Principal Investigator |
MORISAKO Kiyotaka Kyoto Institute of Technology, Faculty of Engineering and Design, Professor, 工芸学部, 教授 (90127168)
|
|---|
| Project Period (FY) |
2002 – 2004
|
| Keywords | Wooden Frames / Large displacement / Numerical Method / Ultimate Behavior / Spring Model of Connections / Hysteresis Model / Incremental Perturbation Method / Moving Coordinates |
|---|
| Research Abstract |
The damage of the recent wooden building subjected to strong earthquake motion shows necessity of a rational design method based on earthquake response analysis. In this study, development of numerical analysis method is carried out for high precise prediction of wooden frames under earthquake. Behavior of a wooden frame is influenced by structural characteristic of the connections. At the time of the ultimate behavior, large displacement occurs in frame. Therefore the gravity effect cannot be ignored.
A numerical method proposed in this study consists of a member model with hysteretic springs on the edges. The hysteretic model of spring is assumed based on the repeated tests of connections. To enable highly precise elastic-plastic analysis, the incremental perturbation method is used in the formulation. In addition, a moving coordinate system is adopted to evaluate a gravity effect.
Moreover, technique to make hysteretic law of elastic-plastic spring model to use for an analysis program is suggested by experimental curves provided by some repeated tests of connections.
|
