Publication

Dynamic performance comparison between buckling-restrained braced frames with concentric and eccentric configurations

Gary Scott Prinz
2012
Conference paper
Abstract

Buckling-restrained braced frames (BRBFs) are often used in steel buildings to resist seismic loads; however, BRBF ductility can be limited by poor performance of the beam-column-gusset regions. Additionally, the concentric brace configuration in BRBFs can limit the use of architectural features, such as doors, windows, or halls. BRBFs with braces in eccentric configurations (called BRBF-Es) may accommodate architectural features similar to eccentrically braced frames, and limit damage to the connection regions through 1) the use of beam splices and 2) separation of the column-to-gusset connection which prevents pinching of the brace gusset plate. Similar to concentric BRBFs, seismic forces in BRBF-Es are dissipated through axial yielding of the buckling-restrained braces, while surrounding elements remain essentially elastic. In this study, the system-level and component-level dynamic performances of conventional BRBF systems are compared with those of BRBF-E systems. Multi-directional dynamic analyses are performed on 5-story BRBF and BRBF-E systems to compare drift demands and local connection demands. Modeling techniques are validated using experimental data for BRBFs. Results indicate similar stiffness between the BRBF and BRBF-E systems; however, with the BRBF-E, gusset connection stresses are greatly reduced due to the beam splices and eccentricity between the braced connection and column.

About this result
This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chatbot

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.