Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Strengthening of Multistory Steel Moment-Resisting Frame Building by Providing Chevron Bracings
Progressive collapse is one of the failure mechanisms, in which the failure of a few critical structural elements leads to the collapse of large parts of a structure disproportionate to original failure. In the present study, the progressive collapse potential of a 9-story steel moment-resisting frame building strengthened by providing a combination of vertical and horizontal arrangement chevron bracings is assessed using the Alternate Path Method (APM) as specified by U. S. General Services Administration (GSA 2016) guidelines. Linear static, nonlinear static, and nonlinear dynamic analyzes are performed using SAP2000 software under the different column and/or brace removal scenarios from the ground floor of the exterior frame. Demand Capacity Ratio (DCR) of columns adjoining to the removed column are calculated from linear static analysis. The nonlinear analyzes are carried out to understand the failure mechanism and to obtain the vertical displacement time history at the column removal location. Linear static analysis results indicate that the provision of chevron bracing effectively limits the DCR value of critical columns within the acceptance criteria. Nonlinear dynamic analysis results advocate effective redistribution of additional loads to the adjoining members upon column removal.
Strengthening of Multistory Steel Moment-Resisting Frame Building by Providing Chevron Bracings
Progressive collapse is one of the failure mechanisms, in which the failure of a few critical structural elements leads to the collapse of large parts of a structure disproportionate to original failure. In the present study, the progressive collapse potential of a 9-story steel moment-resisting frame building strengthened by providing a combination of vertical and horizontal arrangement chevron bracings is assessed using the Alternate Path Method (APM) as specified by U. S. General Services Administration (GSA 2016) guidelines. Linear static, nonlinear static, and nonlinear dynamic analyzes are performed using SAP2000 software under the different column and/or brace removal scenarios from the ground floor of the exterior frame. Demand Capacity Ratio (DCR) of columns adjoining to the removed column are calculated from linear static analysis. The nonlinear analyzes are carried out to understand the failure mechanism and to obtain the vertical displacement time history at the column removal location. Linear static analysis results indicate that the provision of chevron bracing effectively limits the DCR value of critical columns within the acceptance criteria. Nonlinear dynamic analysis results advocate effective redistribution of additional loads to the adjoining members upon column removal.
Strengthening of Multistory Steel Moment-Resisting Frame Building by Providing Chevron Bracings
Lecture Notes in Civil Engineering
Kondraivendhan, B. (Herausgeber:in) / Modhera, C. D. (Herausgeber:in) / Matsagar, Vasant (Herausgeber:in) / Patel, Parthav P. (Autor:in) / Joshi, Digesh D. (Autor:in)
14.05.2022
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Mitigation of Progressive Collapse of Multi-Storey Steel Building by Providing Chevron Bracings
| Springer Verlag | 2022
| British Library Online Contents | 2012