Seismic Evaluation and Cyclic Testing of Buckling Restrained Braces Manufactured in Iran

Abstract eng:
Braced frames, as passive control systems of frame structures, are an efficient means of controlling lateral deformation of buildings. The common practice for achieving economy is to allow strategic elements of frames undergo plastic deformation in order to enhance the energy absorption of the system.. In regular braced frames the weak link is the brace element in compression. One way to remove this deficiency is to employ buckling restrained braces (BRB). Buckling prevention in BRBs is achieved by jacketing a core of a steel plate with concrete, which is in turn encased in a steel tube. This will restrain the buckling of the core plate. A coating material is used between the concrete and the core in order to prevent transmission of axial force upon the onset of plastic deformation in the plate. In this manner the compression behavior of the brace will be the same as that of its tension. This paper examines the cyclic behavior of BRBs constructed from the steel produced in Iran with other locally available materials. Some parameters, such as the width of the gap between the core and the encasing concrete, the cross-section of the core, … are varied in order to elicit their effects on the behavior of the brace. The experimental part of the study included 6 samples of the brace: 2 half scale and 4 of ¼ scale. These samples were tested under the same loading protocol and their results are compared and discussed.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket