Reliability of lattice dome with and without the effect of using small number of ground motion records in seismic design
Reliability of lattice dome with and without the effect of using small number of ground motion records in seismic design
复制标题
抗震设计中使用少量地震动记录和不使用少量地震动记录影响的格构穹顶的可靠性
DOI：
10.1016/j.engstruct.2017.07.038
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发表时间：
2017-11
影响因子：
5.5
通讯作者：
Hong H. P.
中科院分区：
文献类型：
--
作者：
Li Y. G.;Fan F.;Hong H. P.
对于给定的地震动记录，线性和非线性地震反应可以通过时程分析来估计。为了减少计算时间，设计规范规定了选择少量地震动记录进行分析和估计抗震设计需求的指导方针。然而，通过使用少量的记录分量来评估抗震设计水平的统计数据以及以这种方式评估设计结构的失效概率是不可用的。本研究主要针对网壳结构进行评估与评价。结果表明，采用7个地震动分量的平均反应进行设计，会导致对抗震设计效果的高估或低估，低估频率约为50%。通过使用七个选定的记录分量估计的抗震设计效果的可变性是相当大的。通过1000次试验的模拟分析，对抗震设计需求的最小低估和最大高估分别为35%和64%，采用7个记录分量的平均响应设计的穹顶的失效概率估计值可比不考虑小样本效应设计的穹顶的失效概率估计值大或小约半个数量级。这表明，为了减少所观察到的相对差异的故障概率，增加地面运动记录组件的数量需要在抗震设计中使用。
Linear and nonlinear seismic responses can be estimated using the time history analysis for given ground motion records. To reduce the computing time, design codes prescribe guidelines to select a small number of ground motion records to perform the analysis and to estimate the seismic design demand. However, the assessment of the statistics of the seismic design level by using a small number of record components and the evaluation of the failure probability of the designed structures in such a manner are unavailable. The assessment and evaluation focused on the lattice dome are presented in this study. The results indicate that the use of average response from seven ground motion record components for design can lead to over- or under-estimation of the seismic design effect, the frequency of underestimation is about 50%. The variability of the seismic design effect estimated by using seven selected record components is considerable. By carrying out simulation analysis with 1000 trials, the minimum underestimation and the maximum overestimation of the seismic design demand are 35% and 64%, respectively; the estimated failure probabilities of the dome designed by using average response from seven record components can be about half an order of magnitude greater or smaller than that of the dome designed without the effect of small sample size. This suggests that to reduce the observed relative differences in the failure probabilities, an increased number of ground motion record components needs to be used in seismic design.
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影响因子：
2.8
作者：
Jihong Ye;Zhiqiang Zhang;Y.-W. Chu
通讯作者：
Jihong Ye;Zhiqiang Zhang;Y.-W. Chu
影响因子：
1.4
作者：
H. Hong;K. Goda;A. Davenport
通讯作者：
H. Hong;K. Goda;A. Davenport
DOI：
10.1061/(asce)0733-9445(2005)131:4(589
发表时间：
2005-04
期刊：
Journal of Structural Engineering-asce
影响因子：
--
作者：
D. Vamvatsikos;Allin Cornell;M. Asce
通讯作者：
D. Vamvatsikos;Allin Cornell;M. Asce
影响因子：
3
作者：
C. Cornell
通讯作者：
C. Cornell
影响因子：
5
作者：
N. Shome;C. Cornell;P. Bazzurro;J. E. Carballo
通讯作者：
N. Shome;C. Cornell;P. Bazzurro;J. E. Carballo