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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The Effects of X-Brace Configuration on the Seismic Performance of Retrofitted RC Frames
https://orcid.org/http://orcid.org/0000-0002-5502-059X
When steel braces are used to retrofit an existing reinforced concrete frame, the paths through which the seismic loads are transferred change, resulting in new demands on the frame members. The brace positioning or configuration has a considerable effect on the new load paths and demands on the frame elements, particularly columns. In the present study, three different X-bracing configurations, termed: centrally stacked (C), end-stacked (E) and diagonally distributed (D), are considered and their effects on the seismic performance of 2D, RC frames; 4, 8 and 12 storeys high and 3 and 6 bays wide are evaluated. To this end, a number of nonlinear pushover analyses are carried out on different retrofitted and non-retrofitted frames and the resulting capacity curves are utilized to determine and compare the frames global seismic performance parameters, including: lateral capacity, stiffness, overstrength, ductility, behaviour factor and toughness. The results of pushover analyses are also used to evaluate and compare new shear, compressive and tensile force demands on the columns, as the most important members of the frames. It is found that the diagonally distributed brace configuration (D) has the most favourable effects on the global seismic performance of the retrofitted RC frames and the least complications and side effects regarding the new demands on columns compared to the common stack-type configurations, C and E.
The Effects of X-Brace Configuration on the Seismic Performance of Retrofitted RC Frames
https://orcid.org/http://orcid.org/0000-0002-5502-059X
When steel braces are used to retrofit an existing reinforced concrete frame, the paths through which the seismic loads are transferred change, resulting in new demands on the frame members. The brace positioning or configuration has a considerable effect on the new load paths and demands on the frame elements, particularly columns. In the present study, three different X-bracing configurations, termed: centrally stacked (C), end-stacked (E) and diagonally distributed (D), are considered and their effects on the seismic performance of 2D, RC frames; 4, 8 and 12 storeys high and 3 and 6 bays wide are evaluated. To this end, a number of nonlinear pushover analyses are carried out on different retrofitted and non-retrofitted frames and the resulting capacity curves are utilized to determine and compare the frames global seismic performance parameters, including: lateral capacity, stiffness, overstrength, ductility, behaviour factor and toughness. The results of pushover analyses are also used to evaluate and compare new shear, compressive and tensile force demands on the columns, as the most important members of the frames. It is found that the diagonally distributed brace configuration (D) has the most favourable effects on the global seismic performance of the retrofitted RC frames and the least complications and side effects regarding the new demands on columns compared to the common stack-type configurations, C and E.
The Effects of X-Brace Configuration on the Seismic Performance of Retrofitted RC Frames
https://orcid.org/http://orcid.org/0000-0002-5502-059X
When steel braces are used to retrofit an existing reinforced concrete frame, the paths through which the seismic loads are transferred change, resulting in new demands on the frame members. The brace positioning or configuration has a considerable effect on the new load paths and demands on the frame elements, particularly columns. In the present study, three different X-bracing configurations, termed: centrally stacked (C), end-stacked (E) and diagonally distributed (D), are considered and their effects on the seismic performance of 2D, RC frames; 4, 8 and 12 storeys high and 3 and 6 bays wide are evaluated. To this end, a number of nonlinear pushover analyses are carried out on different retrofitted and non-retrofitted frames and the resulting capacity curves are utilized to determine and compare the frames global seismic performance parameters, including: lateral capacity, stiffness, overstrength, ductility, behaviour factor and toughness. The results of pushover analyses are also used to evaluate and compare new shear, compressive and tensile force demands on the columns, as the most important members of the frames. It is found that the diagonally distributed brace configuration (D) has the most favourable effects on the global seismic performance of the retrofitted RC frames and the least complications and side effects regarding the new demands on columns compared to the common stack-type configurations, C and E.
The Effects of X-Brace Configuration on the Seismic Performance of Retrofitted RC Frames
Iran J Sci Technol Trans Civ Eng
Maheri, Mahmoud R. (Autor:in) / Fathi, A. (Autor:in)
01.12.2022
24 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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