【摘要】 为了深入了解地震作用下土钉墙动力特性,并为其提供实用的动力分析方法,基于动力Win-kler地基模型,建立了考虑面板、坡后土体及土钉协同工作的土钉墙动力分析模型,并进行了求解。该模型将面板处理为弹性地基梁,将土钉处理为一个弹簧和阻尼来替代。基于建立的计算模型和震害模式给出了其抗震设计方法,并结合具体工程实例进行了地震作用动力分析及抗震设计,最后与动力离心试验进行了验证。结果表明:土钉墙延性大,具有良好的抗震性能;土钉的峰值轴力连线与静力作用下相似;提出的分析方法对土质较均匀的边坡是可行的,为土钉墙的地震分析及抗震设计提供了一种新的途径。更多还原

【Abstract】 In order to deeply investigate the dynamic characteristics of soil nailing retaining wall under earthquake and provide practical dynamic analysis method,based on dynamic Winkler foundation theory,considering that the facing,the soil behind slope and the soil nailing work together,the dynamic analysis model for soil nailing retaining wall was established and the analytical solutions were obtained.The facing was treated as elastic foundation beam in this model.The influence of the soil nailing was simplified as linear spring and damped system.Seismic design methods were given based on proposed calculation model.The seismic response of engineering example was analyzed using the proposed method.And the proposed method was verified with centrifugal test.The results show that the soil nailing retaining wall has good anti-seismic performance and the peak value of soil nailing axial force and static attachment are the same.The proposed method for analysis is feasible for the slopes with relatively uniform soil.The analysis model provides a new way for seismic analysis and seismic design of the soil nailing retaining wall.更多还原