【摘要】 楼层反应谱是非结构部件抗震设计的关键，一般可以通过时程分析法或者直接法获得。由于时程分析法耗时较长，难以满足工程初步设计阶段对效率的要求。目前常用的直接法在计算楼层反应谱时仅能考虑弹性阶段，无法准确地反映实际结构在地震作用下的弹塑性行为。针对上述问题，以我国量大面广的钢筋混凝土（RC）框架结构为研究对象，采用三维精细化有限元模型开展弹塑性楼层反应谱分析。依次研究了楼层高度、非结构部件阻尼比和结构延性系数三个关键因素对楼层反应谱结果的影响。在此基础上，基于Peter Fajar方法开发了一种弹塑性楼层反应谱直接法，并提出了适用于我国RC框架结构的动力放大系数公式。最后，通过与3层框架结构时程法楼层反应谱结果进行对比，验证了本文所提出的方法能够快速且准确地估计我国RC框架结构的楼层反应谱，从而为非结构部件抗震设计提供了一种高效的简化方法。更多还原

【Abstract】 The floor response spectrum is essential for the seismic design of non-structural components and can generally be obtained through time-history analysis or direct methods. However, time-history analysis is time-consuming and cannot meet the efficiency requirements during the preliminary engineering design phase. The commonly used direct methods can only consider the elastic stage when calculating the floor response spectrum and cannot accurately reflect the actual structure’s elastoplastic behavior under seismic action. To address the above issues, widely used reinforced concrete(RC) frame structures in China were selected as the research object, and a three-dimensional refined finite element model was employed to conduct the elastoplastic floor response spectrum analysis. The effects of three key factors—floor height, damping ratio of non-structural components, and structural ductility coefficient—on the floor response spectrum results were investigated sequentially. Additionally, based on the Peter Fajfar method, an elastoplastic floor response spectrum direct method was developed, and a dynamic amplification factor formula applicable to RC frame structures in China was proposed. Finally, by comparing the floor response spectrum obtained by time-history analysis for a three-story frame structure, the proposed method in this study was verified to rapidly and accurately estimate the floor response spectrum of RC frame structures in China, thereby providing an efficient simplified method for the seismic design of non-structural components.更多还原