【摘要】 结构在罕遇地震作用下会进入弹塑性并产生损伤,准确预测地震荷载下结构的非线性行为,对评估结构的抗震安全性具有重要意义。某框架结构采用非线性粘滞流体阻尼器对现有结构进行抗震加固。文章采用纤维模型直接将构件的非线性节点力、节点变形和材料的非线性应力-应变行为联系起来,准确模拟地震作用下结构的三维非线性地震响应。利用纤维模型对该工程结构进行了动力弹塑性时程分析,结果表明采用阻尼器对结构进行消能减震设计后,能够延缓结构的塑性行为发展程度,满足设计目标。更多还原

【Abstract】 Structures will enter nonlinear stage during strong earthquakes.Hence accurate prediction for the structural nonlinear behaviors is important to the safety and loss assessment during earthquakes.Nonlinear fluid dampers are installed in a frame structure to reinforce it.This paper adopts fiber model which connect the material stress-strain relationship directly with the force-displacement behavior of the structural elements to simulated the spatial seismic responds of structures precisely.The structure is analyzed with dynamic time-history analysis to show that the dampers can delay the development degree of plastic behavior,meet design targets.更多还原