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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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An Experimental and Analytical Study on Cross-Laminated Bamboo rocking walls with Friction Dampers

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Journal of Renewable Materials 2021年第10期9卷 1757-1779页

作者： Qingfang Lv Tongchen Han Ye Liu Yi Ding Yujie Lu Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education Southeast UniversityNanjing210096China Key Laboratory of Deep Underground Science and Engineering(Ministry of Education) College of Architecture and EnvironmentSichuan UniversityChengdu610065China

Cross-laminated bamboo(CLB)have a high strength to weight ratio and stable bidirectional mechanical *** by the investigation on cross-laminated timber(CLT)rocking walls,CLB rocking walls with conventional friction dampers(CFDs)are studied in this *** investigate the mechanical properties of the CLB rocking wall,seven tests are conducted under a cyclic loading scheme,and different test parameters,including the existence of the CFDs,the moment ratio,and the loading times,are *** test results show a bilinear behavior of the CLB rocking *** small residual displacements of the CLB rocking wall demonstrate an idealized self-centering *** cumulative energy dissipation curves indicate that the energy dissipation capacity of the CLB rocking wall can be greatly improved with *** limit states of the CLB rocking wall under a lateral force are proposed based on the strains,stress,and damage level of the CLB material and posttensioned *** addition,an analytical model of the CLB rocking wall is developed based on the proposed limit states of the CLB rocking wall to evaluate the hysteretic response of the CLB rocking wall,and the model is validated by the experimental *** comparison results show the potential value of the analytical model for engineering design.

关键词： Cross-laminated bamboo(CLB) rocking wall friction dampers self-centering posttensioned rebar

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