A general methodology to investigate the relation between seismic performance and brace over-strength distributions in steel braced frames is presented. The influence of brace over-strength distributions on the seismic motion are studied through sensitivity analysis including the random nature of the seismic input. The actual nonlinear variations of engineering demand parameters (EDPs), as well as their linearly approximated variations, are derived. Afterwards, a range of variation of the brace over-strengths is defined and the brace over-strength patterns that are the most unfavourable for each EDP are identified and the relevant maximum increment of each EDP is determined. Finally, the relationship between the brace over-strength used in the seismic design and the maximum seismic performance reduction is obtained.

Influence of brace over-strength distributions on the seismic response of steel braced frames

ZONA, Alessandro;DALL'ASTA, Andrea;
2012-01-01

Abstract

A general methodology to investigate the relation between seismic performance and brace over-strength distributions in steel braced frames is presented. The influence of brace over-strength distributions on the seismic motion are studied through sensitivity analysis including the random nature of the seismic input. The actual nonlinear variations of engineering demand parameters (EDPs), as well as their linearly approximated variations, are derived. Afterwards, a range of variation of the brace over-strengths is defined and the brace over-strength patterns that are the most unfavourable for each EDP are identified and the relevant maximum increment of each EDP is determined. Finally, the relationship between the brace over-strength used in the seismic design and the maximum seismic performance reduction is obtained.
2012
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/247536
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