【摘要】 振动控制是结构抗震防灾的一种积极有效手段,目前对于大跨空间结构的振动控制技术不是很成熟,利用软钢板(Mild Steel)在反复循环荷载作用下具有稳定的滞回特性,设计了U形软钢板阻尼器,通过试验得出该阻尼器的滞回曲线,建立了该阻尼器分析模型。最后,将该阻尼器应用于平板网架结构,探讨了该阻尼器在空间结构中的减震控制理论和方法。通过地震反应时程分析,分析了其减震效果,对有控和无控状态下的节点位移和杆件内力进行对比分析。结果表明,该新型阻尼器可有效的减少网架结构的地震响应。更多还原

【Abstract】 Vibration control is an effective way of earthquake mitigation and disaster prevention for engineering structures.At present,vibration control techniques for long-span spatial structures have not been well formed and therefore need to be investigated and developed.In this paper,using mild steel plate have stable hysteresis under loading and unloading repeated cycles,designed a U shape mild steel plate damper,an hysteresis loop and analytical model was carried out by experimental test At last,this damper is applied to space truss structure to investigate its vibration control performance. The control effectiveness under earthquake excitation is analyzed.A comparison is made for nodal displacements and internal forces of members between control and without control.It is shown that the new type of mild steel plate damper is very effective to mitigate earthquake response of space truss structures.更多还原