摘要
采用纤维单元模型对1个3层钢-混凝土混合结构试验模型进行动力弹塑性时程分析,在多条不同地震波作用下,通过数值模拟得到结构的地震需求概率函数,并以此作为结构地震需求的先验概率。基于贝叶斯理论并结合振动台试验数据,更新需求信息,得到模型结构地震需求的后验概率,预测其在不同强度地震作用下的破坏概率。研究结果表明,较小强度地震作用下的数值模拟结果与试验结果吻合较好,强震作用下需基于贝叶斯理论并结合试验数据进行修正,修正后的易损性曲线能够对结构的损伤状态进行更准确的评估。
In this paper,the dynamic elasto-plastic responses of a three-story steel-concrete hybrid structural test model were analyzed using the fiber element model. The probability function of the seismic demand for the structure can be obtained by the numerical simulation due to several different earthquake records. By means of the Bayesian theory,the probability function which was used as the prior probability was updated according to the shaking table test data,and the posterior probability of the seismic demand for the model structure was determined to predict its failure probability due to different intensities of earthquakes. Results indicate that the numerical simulation results are in good agreement with experiments under small earthquakes,and which need to be updated according to the Bayesian theory combining with the test data under strong earthquakes. The undated fragility curves are able to evaluate the damage states of structure more accurately.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2014年第9期20-26,共7页
Journal of Building Structures
基金
国家自然科学基金优秀青年基金项目(51322806)
中央高校基本科研业务费专项项目(2014JBZ011)
关键词
钢-混凝土混合结构
贝叶斯理论
易损性分析
动力弹塑性分析
损伤状态
steel-concrete hybrid structure
Bayesian theory
fragility analysis
dynamic elasto-plastic analysis
damage state
