高烈度地震区带软钢阻尼器的框架-核心筒结构抗震性能分析

减隔震技术是当前抗震研究的热点,其中,软钢阻尼器是结构被动控制中耗能减震装置的一种。软钢阻尼器在地震时,通过软钢发生塑性屈服滞回变形而耗散输入结构中的能量,从而达到减震的目的。由于构造简单,力学概念明确,技术性能可靠且易实现,软钢阻尼器已成为较多应用于高层建筑抗震的减震技术之一。本文利用NosaCAD有限元分析软件,对某高层建筑进行了非线性时程分析,并对该高层建筑应用软钢阻尼器进行设计,计算中用斜向阻尼器进行模拟。基于9度罕遇地震进行设计,通过分析结构的位移响应、损伤发展以及阻尼器的滞回曲线等性能指标,验证了软钢阻尼器对于高烈度地震区高层建筑减震的作用。

Seismic analysis of frame-core wall structure using hysteretic dampers in high-intensity earthquake region

Seismic mitigation and isolation technique has become the focus of research nowadays,in which the hysteretic damper belongs to the passive structural control method.The seismic mitigation effect of hysteretic damper is a result of the plastic de-formation of low yield strength steel.Hysteretic damper is often applied in the design of high-rise buildings due to its simplified structure,clear mechanics concept,and practical engineering usage.In this paper,a high-rise model is built using the NosaCAD software to conduct the nonlinear time history analysis under 9-degree rare earthquake.According to the story drift,the damage evolution of core tubes and the hysteretic curves of dampers,as well as hysteretic dampers are proved to be effective in high-in-tensity earthquake region.