APPLICATIONS OF SEISMIC RETROFITTING METHOD BY FRAMED STEEL BRACE SYSTEM CONCENTRICALLY JOINTED WITH ANCHORS AND AN EVALUATING METHOD FOR THE LATERAL STRENGTH OF THE RETROFITTED FRAMES IN THE HORIZONTAL JOINT FAILURE MODE

Abstract

The authors have developed a seismic retrofitting method for existing RC frames by framed steel braces partially and concentrically jointed with anchors. As the primary purpose of applying this method to existing frames of low strength concrete, the short span, and SRC structure, loading tests of new five specimens were conducted. In this paper, the details of the test results are reported, and the validity of the proposed evaluating method for the lateral strength of the retrofitted frame in the horizontal joint failure mode is verified using the test results of eleven specimens including six specimens in the previous studies.