Fixing steel braced frames to concrete structures for earthquake strengthening

摘要

Steel braced frames are widely used to upgrade concrete structures for earthquake loads. They are used both to strengthen the structure and to increase its ductility. In order to transfer the horizontal shear loads from the concrete structure to the steel braced frame, a reliable connection between the two is essential. It must be able to transfer the full capacity of the steel frame with only limited displacements. The behavior of two different fixing methods has been investigated in research programs in Japan and in Europe. A device to ensure an evenly distributed load transfer to a long row of anchors has been developed to meet the requirements of such applications.