黏弹性复合防屈曲支撑钢框架结构抗震抗风性能分析

Analysis of seismic and wind-resistant performance of viscous-elastic buckling-restrained braced frame

针对当前耗能减振技术用于结构抗风抗震时不具备自适应能力的问题,提出变形协调、并联出力的黏弹-金属-体化复合阻尼器及其耗能减震结构,以实现结构抗风抗震自适应多灾害防御体系。本文以黏弹性复合防屈曲支撑钢框架结构为研究对象,进行大震及强风作用下的性能分析,并将其与普通钢框架结构和防屈曲支撑钢框架结构的抗震、抗风性能进行对比分析。结果表明,罕遇地震下黏弹性复合防屈曲支撑钢框架结构呈现更小的基底剪力和顶层加速度,但层间位移角较防屈曲支撑钢框架结构有所增大;在强风作用下,黏弹性复合防屈曲支撑钢框架结构的顶层加速度、顶层位移及层间位移均小于钢框架及防屈曲支撑框架结构。

The current energy dissipation technology does not have the self-adaptive ability when used in wind-resistant and earthquake-resistant structures. To realize the self-adaptive multi-disaster defense system for wind-resistant and earthquake-resistant structures, a viscoelastic-metal integrated composite damper with deformation coordination and parallel output is proposed. In this paper, the viscous-elastic buckling-restrained braced frame(VE-BRBF) is taken as the object, analysis of performance under strong earthquake and strong wind is carried out, and compared with the performance of the moment resistant frame(MF) and buckling restrained braced frame(BRBF). Results are as follows: In rare earthquake, the base shear and the roof acceleration of the VE-BRBF change smaller while the story drift increased compared with the BRBF. The base shear, the roof displacement and story drift are all reduced under high wind speed compared with the MF and the BRBF.