【摘要】 研究砌体结构采用外套预制钢筋混凝土墙板加固以及加层隔震后结构在大震作用下的非线性动力响应。基于通用大型有限元软件ABAQUS建立砌体结构模型、加固结构模型以及加层隔震模型,对这些模型进行大震作用下的动力弹塑性分析。计算结果表明,在大震作用下加固结构较原结构的砌体部分承担的地震响应大大减小,非线性损伤也大大减轻,基底剪力大部分由外套结构承担;加层隔震不但不会加大原有结构的地震作用,反而会削弱下部结构的地震作用,进一步减轻砌体部分的非线性损伤。通过分析表明,砌体结构采用外套预制钢筋混凝土墙板加固技术减轻地震响应和损伤,可以取得良好的加固效果,加层隔震后的加固效果更好,文中提出的加固方法具有良好的应用前景。更多还原

【Abstract】 Nonlinear dynamic response of masonry structure strengthened by external prefabricated reinforced concrete panel and the adding-story isolation structure under major earthquake is carried out. The ABAQUS finite software is used for dynamic elasto-plastic analysis of the masonry structure model, the reinforcement structure model and adding-story isolation on the top of reinforcement structure model. The results show that seismic response and nonlinearity impairments of original masonry building is mitigated effectively after reinforcement, the base shear forces are undertook all mostly by external structure; Adding-story isolation reduce seismic action of the substructure and mitigate masonry impairments. The analysis shows that, masonry structure strengthened by external prefabricated reinforced concrete panel is very effective by reduce the seismic response and damage, and the effect of the adding-story isolation structure is better, the reinforcement method of this paper has a good prospect of engineering application.更多还原