LI Zhenzhen,ZHAO Baocheng.Study on the Hysteretic Behavior of a Brace Dissipated Energy by Yielded Flexural‑and‑shear Plates[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(01):151-161.
LI Zhenzhen,ZHAO Baocheng.Study on the Hysteretic Behavior of a Brace Dissipated Energy by Yielded Flexural‑and‑shear Plates[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(01):151-161. DOI: 10.13409/j.cnki.jdpme.201912069.
Study on the Hysteretic Behavior of a Brace Dissipated Energy by Yielded Flexural‑and‑shear Plates
Under the action of fortification and rare earthquakes, it is easy for the diagonal brace of the concentrically-braced frame structure to lose stability under compression. To avoid the buckling of the diagonal brace, an energy dissipation brace with yielded flexural-and-shear plates is proposed. The hysteretic behavior of the energy dissipation brace was analyzed by ABAQUS and was compared with that of the energy dissipation brace with yielded flexural plates. At the same time, the energy dissipation capacity of the proposed brace with different design parameters is investigated. The results show that the proposed brace dissipates energy through the yielding of its shear plates in the early stage; the hysteretic curve is full, and the energy dissipation ability is superior. Its initial stiffness and yield capacity are greatly improved compared with the energy dissipation brace with yielded flexural plates. The ratio of height to width and the ratio of height to thickness of shear plates are important factors affecting the initial stiffness, yield capacity and hysteretic behavior of the brace. The calculation formulas of initial stiffness and yield bearing capacity of the new energy dissipation brace with yielded flexural-and-shear plates are deduced. The calculated results of formulas are in good agreement with the results of finite element analyses, which provide a reference for engineering applications.
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