【摘要】 提出了两种可拆卸式消能减震钢桁架式连梁,连梁的上下弦杆与钢筋混凝土剪力墙内的钢结构预埋件铰接,而腹杆与弦杆采用螺栓连接,且腹杆由屈曲约束支撑或屈曲约束钢腹板等消能装置组成。通过2个1/2比例的钢桁架连梁试件的低周反复荷载试验研究了该可拆卸式钢桁架连梁的抗震性能。研究表明:设置屈曲约束支撑和设置屈曲约束钢腹板的钢桁架连梁具有较好的强度和位移延性,其破坏模式表现为消能减震装置的塑性破坏;连梁试件的滞回曲线饱满,耗能能力良好;建议的钢桁架连梁能够满足高烈度区连梁抗震性能的需求,能够应用于高烈度区的联肢剪力墙结构中。更多还原

【Abstract】 This paper presents two new types of replaceable steel truss coupling beams with energy dissipating devices for hybrid coupled wall systems.The top and bottom chords of the proposed coupling beams are pinned to the steel embedment in reinforced concrete walls while the energy-dissipating devices such as buckling restrained braces or buckling restrained steel plates are adopted as the webs of the beams and bolted to the chords.Two 1 /2-scale steel truss coupling beams were tentatively tested under simulated seismic loadings to evaluate the seismic behavior.The experimental results indicate that the two proposed coupling beams with buckling restrained braces or buckling restrained steel plates exhibit high strength capacity and displacement ductility.The failure of the coupling beams is caused by the large inelastic deformation of energy-dissipating devices.Therefore,the coupling beams achieve satisfactory hysteretic behavior and excellent energy-dissipating capacities.The studies also demonstrate that the proposed coupling beams meet the requirements of coupling beams in high seismic zones and thus can be applied in the coupled wall systems.更多还原