摘要
消能减震技术日趋成熟,阻尼器作为降低结构响应的耗能部件日益广泛地应用于高层建筑结构的抗震控制中。然而,近年来在极端震害的检验下,研究人员发现阻尼器这种非结构元件发生了一定程度的破坏甚至完全失效,这对基于性能的抗震设计提出了新的挑战——在极端荷载下需要考虑消能减震元件破坏失效对结构性能的影响。以某30层混凝土框架核心筒结构为算例,通过基于IDA(增量动力分析)方法的地震易损性分析,对阻尼器失效前后的结构进行计算对比,结果表明,阻尼器失效将会明显降低结构所能承受的极限地震动强度,降低结构延性,增加结构的损伤概率,且随着地震动强度的增加,会加速结构倒塌概率的增长。
With the development of energy components, are getting more applications damages in dampers have been reported dissipation technology, dampers, as the important energy dissipation in the seismic control of high-rise buildings. However, serious in the recent severe earthquakes, and this puts forward a new challenge toward the performance-based seismic design the effects of the damper failure on structural performance as an actual event need to be further investigated systematically and thoroughly. The seismic performance of a 30-storey RC frame-core tube building is conducted through the IDA-based seismic fragility analysis. Comparisons are made with cases of all dampers being in effective or destroyed completely. Numerical studies show that the failure of dampers may significantly diminish the resistance capacity and the ductility of the structural system subjected to severe earthquakes, increase the damage the increase of ground motion intensity, the probability of structural collapse probability. And furthermore, with will be accelerated.
作者
陈煜棪
钱江
CHEN Yuyan, QIAN Jiang(State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University, Shanghai 200092, Chin)
出处
《结构工程师》
北大核心
2018年第1期69-75,共7页
Structural Engineers
基金
国家自然科学基金资助项目(51638016)
关键词
消能减震
阻尼器失效
地震易损性
极限性能
框架核心筒
energy dissipation, damper failure, seismic fragility, uhimate performance, frame-core tube structure
