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Seismic optimization analysis of high-rise buildings with a buckling-restrained brace outrigger system
Highlights Based on response spectrum method the simplified model of BRB outrigger was proposed. A fitting equation was developed to obtain the optimal damped outrigger location. The optimal location of BRB outrigger is lower than that of conventional outrigger. Yielding force and initial stiffness of BRB influence structural fragility probability.
Abstract A damped outrigger system is developed to improve the conventional outrigger system by providing supplemental damping to control vibration in high-rise buildings. The optimal seismic performance of a buckling-restrained brace (BRB) outrigger system is investigated in this study using a spectrum-analysis-based simplified model. This simplified model is first calibrated by an ANSYS model via response history analysis. It is then used to perform numerous parametric analyses to determine the optimal damped outrigger location and damping ratio. Subsequently, a comprehensive dimensionless parameter associated with all the data obtained from the parametric analyses is obtained to solve a fitted equation of the optimal damped outrigger location. And the top displacement is also fitted with regard to the period to construct an equation of the top displacement spectra. These fitted equations can contribute to the preliminary design of BRB outrigger buildings.
Seismic optimization analysis of high-rise buildings with a buckling-restrained brace outrigger system
Highlights Based on response spectrum method the simplified model of BRB outrigger was proposed. A fitting equation was developed to obtain the optimal damped outrigger location. The optimal location of BRB outrigger is lower than that of conventional outrigger. Yielding force and initial stiffness of BRB influence structural fragility probability.
Abstract A damped outrigger system is developed to improve the conventional outrigger system by providing supplemental damping to control vibration in high-rise buildings. The optimal seismic performance of a buckling-restrained brace (BRB) outrigger system is investigated in this study using a spectrum-analysis-based simplified model. This simplified model is first calibrated by an ANSYS model via response history analysis. It is then used to perform numerous parametric analyses to determine the optimal damped outrigger location and damping ratio. Subsequently, a comprehensive dimensionless parameter associated with all the data obtained from the parametric analyses is obtained to solve a fitted equation of the optimal damped outrigger location. And the top displacement is also fitted with regard to the period to construct an equation of the top displacement spectra. These fitted equations can contribute to the preliminary design of BRB outrigger buildings.
Seismic optimization analysis of high-rise buildings with a buckling-restrained brace outrigger system
Xing, Lili (author) / Zhou, Ying (author) / Huang, Wei (author)
Engineering Structures ; 220
2020-06-08
Article (Journal)
Electronic Resource
English
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