Experiments and Its Applications of Reinforced Buckling Restrained Brace

• Main Authors: I-Te Liang, 梁義德
• Other Authors: Chong-Shicn Tsai
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/31039425299714412803

碩士 === 逢甲大學 === 土木工程所 === 93 === After the 921Chi-Chi earthquake, the seismic resistance of buildings has been extensively and positively discussed, and passive control really proves its ability no matter in element designs, experiments or its applications. The buckling restrained brace has been proposed and frequently discussed in recent years. Results of studies indicate that the buckling restrained brace is an axial element that not only strengthens stiffness of a structure but also can absorb seismic energy. In addition, the buckling restrained brace can improve the shortcomings of the axial compression buckling of the traditional brace in severe earthquakes. The frequently mentioned problems for the buckling restrained brace included that（1）suitable unbonding material；（2）complicated assembly procedures；（3）long time for maintenance during manufacturing；（4）problems with fire protection need to overcome. The purposes of this study included that (1) stability investigation of the reinforced buckling restrained brace in dynamic tests；(2) research and development of reinforced buckling restrained brace with no need of unbonding materials and maintenance, easy fabrication and good fire proof ability；(3) shaking table test of a three floor scale-down frame to examine the seismic resistibility and stability of a structure equipped with reinforced buckling restrained braces.In this research, two kinds of reinforced buckling restrained braces neither with unbonding material were designed for different purposes. One has a gap in the thickness direction and the other one without any gap in the thickness direction. After the component test, the hysteresis loop of the one without gap possesses more stable capacity of energy dissipation, although both types of reinforced buckling restrained braces have stable characteristics of dissipating seismic energy. The shaking table tests showed that. The reinforced buckling restrained brace is quite effective in controlling column shear forces and story drifts. Thus, it is capable of upgrading seismic resistance of structions.