| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
|
|---|
| Outline of Final Research Achievements |
A new ductile knee brace with a built-in comb-shaped damper for seismic retrofitting is proposed in the present study. The proposed ductile knee brace is composed of a wide-flange member with multiple slot holes in its web plate, which is designed to plastify earlier at shear-yielding struts in the comb-shaped web. Cyclic loading tests of component and subassemblage specimens were conducted to investigate cyclic behavior of the knee brace. The test results show that the knee brace exhibited a sufficient deformation capacity, i.e., the knee brace worked as a seismic damper. The strength of the overall knee brace member can be estimated well by a simple mechanical model. The cyclic behavior of the subassemblage specimens can be simulated via a frame analysis with a tri-linear axial load-deformation model of the knee brace member. It is also shown that the experimental low cycle fatigue lives of the knee braces can be predicted with the fatigue curve of the steel.
|
