Example collapse performance evaluation of steel concentrically braced systems

Chui-Hsin Chen*, Stephen Mahin

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Conventional special concentrically braced frames (SCBF) have been widely used due to their efficiency in resisting lateral forces. Under severe lateral loading, braces will buckle, laterally and locally, leading to a deterioration of the strength and stiffness of the SCBF and under repeated excursions of cyclic inelastic deformation to fracture of braces. On the other hand, buckling restrained braced frames (BRBF) provide more stable hysteretic behavior. The collapse resistance of SCBF and BRBF systems is examined. A series of 2, 3, 6, 12 and 16 story tall, double story X braced frame archetypes designed using the provisions of ASCE-7/05 for seismic design category D min and D max are analyzed using the ATC-63 methodology. The paper examines modeling of steel braced frames, including brace buckling and rupture due to low cycle fatigue, as well as the application of the ATC 63 methodology. Results of representative static pushover and dynamic analyses are presented. For the assumptions in the ATC 63 methodology and the current ability to model braced frame behavior, it was found that, except for lowrise SCBF structures, a high confidence of achieving the collapse prevention limit state was provided. Reasons for the behavior predicted are presented, along with recommendations for improved design and evaluation methods.

Original languageEnglish
Title of host publication9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium
Pages3976-3985
Number of pages10
StatePublished - 1 Dec 2010
Event9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium - Toronto, ON, Canada
Duration: 25 Jul 201029 Jul 2010

Publication series

Name9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium
Volume5

Conference

Conference9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium
CountryCanada
CityToronto, ON
Period25/07/1029/07/10

Fingerprint Dive into the research topics of 'Example collapse performance evaluation of steel concentrically braced systems'. Together they form a unique fingerprint.

Cite this