Application of seismic resilient energy-dissipative rocking columns with HSS tension braces in steel frames. (15th February 2022)

• Record Type: Journal Article
• Authors: Li, Yan-Wen; Wang, Yuan-Zuo; Wang, Yan-Bo
• Is Part Of: Engineering structures. Volume 253(2022)
• Publication Date: 2022-02-15
• Subjects: Energy-dissipative rocking columns -- Tension braces -- High-strength steel -- Cyclic loading test -- Numerical study -- Time-history analysis; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2021.113812
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: A high post-yield stiffness rocking system, namely energy-dissipative rocking columns with high strength steel tension braces (EDR-TB), is proposed. The high post-yield stiffness of EDR-TB is provided by the high strength steel tension braces. Feasibility of the EDR-TB is verified by cyclic loading test. Effectiveness of the EDR-TB in mitigating maximum and residual drifts and drift concentration is verified by nonlinear time history analysis. Abstract: Steel moment resisting frames are widely used as seismic resisting systems of buildings in earthquake regions. Since their satisfactory performance is achieved by developing plastic deformation in critical regions, it usually leads to inter-storey drift concentration during a strong earthquake and significant residual deformation after a strong earthquake. To mitigate seismic damage concentration and excessive residual deformation, this study proposed a high post-yield stiffness rocking system, namely energy-dissipative rocking columns with high strength steel tension braces (EDR-TB). The study commenced with lateral cyclic loading tests on the proposed EDR-TB column. Subsequently, numerical model of the EDR-TB was built and validated against test results. System-level nonlinear static and time-history analysis were then conducted on the steel frame with various layouts of the EDR-TB columns. Compared with a conventional steel frame, the frame with EDR-TB columns exhibited much reduced maximum and residual drifts. In addition, the frame with EDR-TB columns exhibited more uniform distribution of drifts. The results also reveal that an appropriate arrangement of lateral resisting capacity of the EDR-TB columns over the structural height may achieve an enhanced seismic performance of the whole structures.