杨参天, 解琳琳, 李爱群, 曾德民, 刘立德. 适用于高层隔震结构的地震动强度指标研究[J]. 工程力学, 2018, 35(8): 21-29. DOI: 10.6052/j.issn.1000-4750.2017.07.0531
引用本文: 杨参天, 解琳琳, 李爱群, 曾德民, 刘立德. 适用于高层隔震结构的地震动强度指标研究[J]. 工程力学, 2018, 35(8): 21-29. DOI: 10.6052/j.issn.1000-4750.2017.07.0531
YANG Can-tian, XIE Lin-lin, LI Ai-qun, ZENG De-min, LIU Li-de. INTENSITY MEASURES FOR SEISMICALLY ISOLATED TALL BUILDINGS[J]. Engineering Mechanics, 2018, 35(8): 21-29. DOI: 10.6052/j.issn.1000-4750.2017.07.0531
Citation: YANG Can-tian, XIE Lin-lin, LI Ai-qun, ZENG De-min, LIU Li-de. INTENSITY MEASURES FOR SEISMICALLY ISOLATED TALL BUILDINGS[J]. Engineering Mechanics, 2018, 35(8): 21-29. DOI: 10.6052/j.issn.1000-4750.2017.07.0531

适用于高层隔震结构的地震动强度指标研究

INTENSITY MEASURES FOR SEISMICALLY ISOLATED TALL BUILDINGS

  • 摘要: 近年来,功能可恢复已逐渐成为地震工程领域的研究热点。隔震技术是实现高烈度区高层结构震后功能可恢复的重要手段。地震作用下,关键工程需求参数(主要包括上部结构最大层间位移角MIDR、顶层最大位移MRD和楼面最大加速度MFA以及最大隔震层位移MBD)是评价该类结构是否满足功能可恢复需求的重要指标。合理的地震动强度指标是预测结构响应和评价结构地震功能可恢复能力的重要基础,该研究基于4个高层隔震案例,考虑结构体系、高度、隔震方案、屈重比和地震动类型等因素的影响,评估了25个地震动强度指标与高层隔震结构关键工程需求参数的相关性。识别了与各关键工程需求参数相关性最佳的地震动强度指标,明确了综合平衡性最佳的地震动强度指标,并讨论了各因素的影响效应。该研究成果可为基于功能可恢复的高层隔震结构抗震性能的评估和设计方法的提出提供参考。

     

    Abstract: Research on the seismic resilient structures has become a critical issue in earthquake engineering recently. The seismic isolation technology is an important method to achieve seismic resilience for tall buildings located in high seismic regions. Critical engineering demand parameters (EDPs), including maximum inter-story drift ratio (MIDR), maximum roof displacement (MRD), maximum floor acceleration (MFA) and maximum bearing displacement (MBD), are the essential indexes for the resilience assessment of seismically isolated tall buildings. To predict the abovementioned seismic responses and evaluate the seismic resilience of a seismically isolated tall building, an impartial intensity measure (IM) is required. Various factors, including the structural systems, structural heights, seismically isolated schemes, yield ratio of the isolation system and types of ground motions, are considered to yield impartial intensity measures for seismically isolated tall buildings based on 4 real engineering practices. The correlation between 25 IMs and the critical EDPs are evaluated. The IMs that has the best correlation with each EDP are identified. The IM which achieves the balance between the correlations with 4 EDPs is further identified. In addition, the influences of various factors are investigated. The research outcome will assist in providing a useful reference for resilience-based seismic design and evaluation methods of seismically isolated tall buildings.

     

/

返回文章
返回