Cyclic tests of novel self-centering buckling-restrained brace

被引：20

作者：

Liu, Lu ^{[1
]}

Wu, Bin ^{[1
]}

Li, Wei ^{[1
]}

Zhao, Junxian ^{[1
]}

机构：

[1] School of Civil Engineering, Harbin Institute of Technology

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2012年 / 42卷 / 03期

关键词：

Buckling restrained brace; Cyclic test; Prestressing force; Residual deformation; Self-centering;

D O I：

10.3969/j.issn.1001-0505.2012.03.028

中图分类号：

学科分类号：

摘要：

An innovative self-centering energy dissipation device called self-centering buckling-restrained brace (SCBRB) is put forward to control maximum and residual drift of steel frame structures subjected to severe earthquakes. The configuration and mechanics of this new system are explained. The design method of primary factors including prestressing force and deformation demands of prestressing tendons is outlined, and one realization of the system, which combines the merits of both self-centering devices and buckling restrained braces (BRBs), is presented. From the cyclic test, it is found that the implementation and maintaining of the prestressing force in the prestressing tendons dominates the re-centering capacity of SCBRB. Too much loss of prestressing force weakens the self-centering capacity. The ratio between the total pretension force of the tendons and the total yield force of energy dissipation bars should be larger than 1.3 to ensure fully self-centering. Results from the cyclic tests of SCBRBs and BRBs confirm the expected re-centering capacity of SCBRBs which eliminates main residual deformations.

引用

页码：536 / 541

页数：5

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