Resilience-based aseismic design method for buckling-restrained braced-RC frame structure

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (7) : 146-154.

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Resilience-based aseismic design method for buckling-restrained braced-RC frame structure

MA Kaize*, LI Lanxin, XING Guohua, CHEN Yunru

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Abstract

In order to establish a seismic design method for the buckling-restrained braced reinforced concrete (BRB-RC) frame structures based on resilience, the quantitative index of resilience level was introduced, the classification of the seismic resilience level of the building was established, the calculation assumption based on functional loss to control the resilience index was proposed. A quantitative relationship of multi-level functional loss of the building was established, and the method to control component damage and engineering demand parameters based on building function loss was proposed. According to the working mechanism for BRB-RC frame, the design method based on resilience was determined, and the design process was established. The design method was applied to the seismic design of a 5-story BRB-RC frame structure and the nonlinear dynamic analyses of the structure subjected to large earthquake were performed. The analysis results show that the inter-story drift ratio and inter-story shear force distribution of the structure meet the design requirements, and the proposed method can achieve the expected seismic resilience target.

Key words

seismic resilience of buliding / buckling-restrained brace / reinforced concrete frame structure / seismic design / function loss

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MA Kaize, LI Lanxin, XING Guohua, CHEN Yunru. Resilience-based aseismic design method for buckling-restrained braced-RC frame structure[J]. Journal of Vibration and Shock, 2025, 44(7): 146-154

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