Buckling‐restrained brace with high structural performance

Abstract

The authors have studied the buckling‐restrained brace providing a stable hysteretic characteristic even under high‐strain conditions. The structural performance of the buckling‐restrained brace is represented by the evaluation formula that is the lower limit of the cumulative plastic strain energy ratio. However, as earthquakes are becoming much longer, so it is necessary to research and develop a new buckling‐restrained brace with a higher energy dissipation capacity. In this paper, our past studies are reviewed and the conditions of high‐performance of buckling‐restrained braces extracted. The buckling‐restrained brace considered was tested. As a result, a buckling‐restrained brace with a larger cumulative plastic strain energy ratio is proposed.

Effects of the clearance between the core plate and restraining part on the structural performance of the buckling‐restrained brace using steel mortar planks

“…In previous studies [9,12,13], the relationship between the cumulative plastic strain energy ratio ω u and the restraining index R was demonstrated in experiments using the restraining index, clearance of core plate, compression-to-tension strength ratio, shape/dimension details, etc. as parameters.…”

“…compressive strength P c by max. tensile strength P t for each axial strain amplitude) was considered as in the previous studies [11,12]. The relationship between compression-to-tension strength ratio α and loading strain is shown in Fig.…”

“…In previous studies [12,13], experiments were conducted with each component of the BRBSM as a parameter, and the formula was presented for the lower limit of the performance evaluation for the cumulative plastic strain energy ratio. Further, design conditions such as core plate shape and width-to-thickness ratio required for a BRBSM with large cumulative plastic strain energy ratio are defined to respond to greater-than-expected earthquake inputs caused by earthquakes directly under the Tokyo metropolitan area and earthquake motions with long pe-Fig.…”

Simulation Study of New Buckling Restraint Bracing Based on Bayesian Optimization Algorithm to Identify the Parameters of Modified Bouc–Wen Model

“…Dizaj et al [31] proposed a shortened BRB with low yield and proved that the shortened BRB has lower potential danger. Iwata et al [32] said that due to the longer and longer duration of the earthquake, it was necessary to study and develop new buckling restrained braces with better fatigue performance and higher energy dissipation capacity, and put forward corresponding opinions from the structure. Tis paper studies the identifcation of mechanical properties of high ductility buckling restrained energy dissipation braces (double stage axial steel damper) made of a new type of austenite steel that Yang et al [33] of Shanghai Research Institute of materials developed.…”

A New Buckling‐Restrained Brace with a Variable Cross‐Section Core

“…From what has been discussed above, the yielding displacement of a BRB exerts an important influence on the seismic performance of the whole structure. However, the primary concerns of scholars are whether BRBs exhibit stable hysteric behaviour and high ductility [12,22,23], and methods to reduce the yielding displacement of BRBs are rarely considered [24][25][26][27].…”