1998 Fiscal Year Final Research Report Summary
Studies of Elasto-Plastic Behavior of Steel Members under Cyclic Axial Force and its Fracture
| Project/Area Number |
08650684
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Building structures/materials
|
|---|
| Research Institution | Science University of Tokyo |
|---|
Principal Investigator |
HIRANO Michikatsu Science Univ.of Tokyo, Faculty of Eng., Professor, 工学部, 教授 (80084359)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HODZUMI Hideo Niigata Inst.of Tech., Faculty of Eng., Assist., Professor, 工学部, 助教授 (10084336)
|
|---|
| Project Period (FY) |
1996 – 1998
|
| Keywords | Steel Member / Axial Force / Local Buckling / Elasto-Plastic Behavior / Crack / Fracture / 破断 |
|---|
| Research Abstract |
Steel axial members sometimes fracture at its local buckling section in an early phase of a load hysteresis. It the purpose of this study to elucidate a structural characteristic of a steel member under a cyclic axial force and its strain hysteresisi until crack occurs in its local buckling section. Specimen was made of a cold roll- formed steel square tube. Experimental variables were slenderness ratio, width-thickness ratio, existence of heat treatment (normalize), and length of specimen.
Main findings were as follows.
1. The energy absorption capacity up to fracture was influenced much more by width-thickness ratio than by slenderness ratio of a test specimen.
2. Assuming a brace of which slenderness ratio is in its ordinary range, the smaller its slenderness ratio was, the greater its energy absorption capacity up to fracture was.
3. There was a slenderness ratio of which energy absorption capacity was the worst in its intermediate range.
|
