Advanced Steel Construction

Vol. 17, No. 2, pp. 169-180 (2021)




Hao-Xiang He *, Li-Can Liao and Shi-Tao Cheng

Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology of Technology, Beijing, China.

*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)

Received: 24 June 2020; Revised: 2 February 2021; Accepted: 6 February 2021




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The performance design for traditional steel rigid connection cannot fulfill the desired seismic requirements. Though beam-column connection with weaken beam end can approximately realize the concept about "strong column-weak beam", the local buckling and the distortion buckling in the weaken zone and the total lateral damage maybe occur in rare earthquake and the capacity is not enough. The replacement connection with low-yield-point steel (LYPS) is proposed base on the idea of resilient structure, and its weakened parts in the flange slab and web plate are filled with LYPS. During earthquake, the LYPS primarily yields and fully dissipates energy. The damage of the main parts in the connection is minor and the LYPS can be replaced after the earthquake. According to the insufficiency of the traditional damage models, the damage model based on differential ratio of elastic plastic dissipated energy is proposed. Low cycle loading experimental research is carried out on three kinds of beam-column connections, which involve the classic connection, the beam end weaken connection and the replacement connection. Comprehensive assessments of damping performance are proposed through a variety of performance evaluation parameters. It is approved that the replacement connection has much more excellent bearing capacity, ductility and energy consumption ability. In addition, the proposed energy damage index can represent damage evolution process and damage law.



Low-yield-point steel, Beam-column connection, Seismic damage model, Damage index, Energy dissipation, Resilient structure, Damping performance


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