网壳结构多参数韧性评价指标

MULTI-PARAMETER RESILIENCE EVALUATION INDEX OF RETICULATED SHELL STRUCTURES

  • 摘要: 随着抗震设计理念的不断发展,抗震韧性得到研究者的广泛关注,逐步成为地震工程的热点课题。该文针对《建筑抗震韧性评价标准》中存在的不足,根据网壳结构在地震作用后的损伤特点与维修方式,定义网壳结构构件和非结构构件的损伤等级,修订“标准”中各项指标的部分计算参数。通过108组覆盖性网壳算例,拟合得到适用于网壳结构的多参数韧性评价指标与等级划分,在4个临界点处的指标值(R值)分别为1.0、1.6、2.0与2.7。以两个大型振动台试验和随机选取的若干网壳算例共同验证韧性评价指标和等级划分的普适性与有效性。结果表明,该文提出的多参数韧性评价指标等级划分全面、合理,能定量地刻画网壳结构震后的韧性情况,可服务于网壳结构抗震韧性和韧性评估体系。

     

    Abstract: With the development of seismic design concepts, seismic resilience has received an extensive attention from researchers and has gradually become a hot topic in earthquake engineering. In view of the deficiencies in the “Standard for Seismic Resilience Assessment of Buildings” and according to the damage characteristics and maintenance methods for the reticulated shell structures after earthquakes, the damage grades of the structural and non-structural components of the reticulated shells are defined, and some calculation parameters of each index in the "Standard" are revised. Through 108 groups of comprehensive reticulated shell examples, the multi-parameter resilience evaluation index and grade division suitable for reticulated shells are obtained by fitting. The index values (R) at the four critical points are 1.0, 1.6, 2.0, and 2.7, respectively. Two large-scale shaking table tests and several randomly selected reticulated shell examples are used to verify the universality and effectiveness of the resilience evaluation index and classification. The results show that: the multi-parameter resilience evaluation index is comprehensive and reasonable, can quantitatively describe the resilience of reticulated shells after earthquakes, and can serve the seismic resilience and resilience evaluation system of reticulated shells.

     

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