采用铅黏弹性连梁阻尼器的框架-核心筒结构减震分析

Energy dissipation analysis of a frame-corewall structure equipped with lead-viscoelastic coupling beam dampers

针对高烈度区某高层框架-核心筒结构弹性层间位移角不满足规范要求,采用铅黏弹性连梁阻尼器进行消能减震设计。分别通过ETABS和PERFORM-3D软件对原结构和减震结构进行多遇地震下的弹性时程分析和罕遇地震下的弹塑性时程分析,对比结构减震前后的地震响应并分析阻尼器的耗能表现。结果表明,铅黏弹性连梁阻尼器用于框架-核心筒结构中可有效提高整体结构的抗震性能,并能减缓或避免主体结构构件的塑性破坏,发挥连梁第一道防线的作用,保护主体结构的安全。

Due to the story drifts of a high-rise frame-corewall structure in high seismic intensity region is beyond the limit, the lead-viscoelastic coupling beam damper(LVCBD) is adopted to control structural vibration in the seismic energy dissipating design. Elastic time history analysis under frequent earthquake and inelastic time-history analysis under rare earthquake respectively by using ETABS and Perform-3D are conducted on the primary structure and damped structure equipped with LVCBDs to investigate the structural seismic response and energy-dissipated capacity of LVCBD. The research results indicate that the LVCBD can be applied in damping design of frame-corewall structure to enhance seismic performance of the whole structure, mitigate or avoid plastic failures of the main structural components, and play first seismic line function, which can protect the safety of main structure in the earthquake.