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Seismic performance of damaged frame retroﬁtted with self-centering and energy-dissipating rocking wall

Resilient Cities and Structures 2023年第1期2卷 143-151页

作者： Genqi Xiao Haishen Wang Peng Pan Department of Civil Engineering Tsinghua UniversityBeijing 100084China Key Laboratory of Civil Engineering Safety and Durability of the China Education Ministry Tsinghua UniversityBeijing 100084China

this paper proposes the novel concept of retroﬁtting damaged reinforced concrete frame with self-centering and energy-dissipating rocking *** studies were carried out base on pushover and time-history *** both pushover and time-history analysis,the soft-story mechanism was effectively mitigated through the rocking wall retroﬁt of the damaged *** results demonstrated that the stiffness and bearing capacity of the retroﬁtted system were improved compare to its intact ***,the seismic response of the damaged frame retroﬁtted using rocking wall in combination with post-tension and shear-type damper fell within the relevant design *** analysis of the rocking wall indicated that there is a linear relationship between the wall thickness and the initial stiffness of the retroﬁtted *** addition of post-tension tendon to the rocking wall system enables the wall to self-center and increases lateral stiffness and bearing capacity of the retroﬁtted *** the shear-type damper was installed,the energy dissipation of the system was increased,and the stiffness and bearing capacity of the retroﬁtted system were also *** the time-history analysis,it was found that the thickness of the rocking wall is directly related to the maximum inter-story drift and the distribution patterns of inter-story drift of the *** the post-tension was added to the system,the maximum inter-story drift under rare earthquake excitation improved signiﬁ*** the addition of shear-type dampers,the overall drift magnitude of the retroﬁtted system was fundamentally decreased.

关键词： Rocking wall damaged frame retroﬁt Post-tensioning Shear-type damper

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