强地震下梁-柱结构推覆侧向承载力离散估计
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摘要
在罕见强地震作用下,准确估计强震作用下的梁-柱结构推覆侧向承载力,预测梁-柱结构的最大弹塑性层间位移,是进行建筑框架设计,提高建筑抗震性能的重要方面。在梁-柱单元模型是杆系结构有限元结构力学分析的基础上,通过多子台地震模拟振动台系统,研究地基变形与整个梁-柱结构体系的动力特性,按照相似理论设计试验模型,考虑SSI效应的地震动输入,基于选用的合理的阻抗函数,提出针对具有整体型屈服机制的梁-柱结构推覆侧向承载力离散估计方法,得出估计公式和分析流程。实验结果表明,该估计方法能准确判断各层出现软弱层破坏机制的可能性大小,较好地预测框架结构的弹塑性地震响应,指导建筑结构的可靠性设计。
In the strong earthquake, the accurate estimation of earthquake under the action of the beam column structure nappe lateral bearing capacity, prediction of maximum play beam column structure plastic layer displacement, is building frame design, an important way to enhance the seismic performance of buildings. In the beam column element model is the basis for analysis of frame structural finite element structural mechanics, through multi seismic simulation shaking table system, deformation of foundation dynamic characteristics and the beam column structure system is researched. According to the similarity theory to design the experiment model, considering the SSI effect of the ground motion input, impedance function is obtained based on reasonable selection. The overall yielding mechanism of beam to column structure nappe lateral discrete estimation method of bearing capacity is proposed, the estimation formula and process analysis is taken. The experimental results show that, the estimation method can accurately judge the layers appear weak layer destruction mechanisms and the possibility of size, it can predict the structural framework of the Elasto-Plastic Earthquake response, it provides reliability of instructing the design of building structure.
In the strong earthquake, the accurate estimation of earthquake under the action of the beam column structure nappe lateral bearing capacity, prediction of maximum play beam column structure plastic layer displacement, is building frame design, an important way to enhance the seismic performance of buildings. In the beam column element model is the basis for analysis of frame structural finite element structural mechanics, through multi seismic simulation shaking table system, deformation of foundation dynamic characteristics and the beam column structure system is researched. According to the similarity theory to design the experiment model, considering the SSI effect of the ground motion input, impedance function is obtained based on reasonable selection. The overall yielding mechanism of beam to column structure nappe lateral discrete estimation method of bearing capacity is proposed, the estimation formula and process analysis is taken. The experimental results show that, the estimation method can accurately judge the layers appear weak layer destruction mechanisms and the possibility of size, it can predict the structural framework of the Elasto-Plastic Earthquake response, it provides reliability of instructing the design of building structure.
引文
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[5]Femando N,Hong Y,Viterbo E.Flip-OFDM for Unipolar Communication Systems[J].IEEE Transactions on Communications,2012,60(12):3726-3733.
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