This article was published online on 2 April 2014. An error was subsequently identified in the caption of Figure 22. This notice is included in the online and print versions to indicate that both have been corrected on 6 May 2014.
Welded end-slot connection and debonding layers for buckling-restrained braces†
Article first published online: 2 APR 2014
Copyright © 2014 John Wiley & Sons, Ltd.
Earthquake Engineering & Structural Dynamics
Volume 43, Issue 12, pages 1785–1807, 10 October 2014
How to Cite
2014), Welded end-slot connection and debonding layers for buckling-restrained braces, Earthquake Engineering & Structural Dynamics, 43, pages 1785–1807, doi: 10.1002/eqe.2423, , , , and (
- Issue published online: 26 SEP 2014
- Article first published online: 2 APR 2014
- Manuscript Accepted: 21 FEB 2014
- Manuscript Revised: 6 FEB 2014
- Manuscript Received: 20 OCT 2013
- buckling-restrained brace;
- hysteresis damper;
- effective stiffness;
- seismic design;
- energy dissipation;
- debonding material
The debonding mechanism has a significant effect on the performance of a buckling-restrained brace (BRB). In this paper, a method for estimating the compression strength adjustment factor for any given BRB core strain is presented. Experimental investigations were conducted on four BRBs to examine the efficiency of four different debonding materials in reducing the difference between the cyclic peak compression and tension. Test results indicate that chloroprene rubber is very easy to install and very effective in minimizing the difference between the compressive and tensile capacities. The excellent performance of 13 full-scale welded end-slot BRBs (WES-BRBs) is illustrated through experiments. Cyclic loading test results of a 12.5-m long jumbo WES-BRB reveal that its peak compressive strength exceeds 16,800 kN and its maximum core strain reaches 0.035. All WES-BRBs show satisfactory performance with a very stable hysteresis response, modest peak compressive to tensile strength ratio, and very predictable axial stiffness. These specimens sustain a cumulative plastic deformation of greater than 400 times the yield deformation. The hysteresis responses can be satisfactorily predicted by using a two-surface plasticity analytical model. Advantages of the welded end-slot connections are also presented through a discussion on the effects of the BRB yield region length ratio on the effective stiffness, the yield story drift, and the core strain level. Copyright © 2014 John Wiley & Sons, Ltd.