【摘要】 针对我国农居结构中比例最高的砖木结构,选取典型结构运用ABAQUS有限元软件进行模态和地震时程弹塑性分析。给出M0.5和M5两种砌筑强度砖木结构农居的前三阶特征周期和振型,并与经验周期公式值进行对比分析,提出后者存在的问题和修改建议。选取天津波作为地震动时程输入,分别计算不同峰值加速度下两种砖木结构农居弹塑性地震反应,给出相应的拉损伤云图,并对结构的破坏特征进行分析,给出结构抗震薄弱部位。结果表明,砌筑强度是决定结构抗震能力的关键因素之一。更多还原

【Abstract】 Aiming at brick-wood rural residence that occupies the highest proportion among all rural residences in China,an elasto-plastic analysis on mode and acceleration time-histories of a typical structure is examined by applying ABAQUS software.The first three characteristic periods and vibration modes of two brick-wood rural buildings with masonry strengths of M0.5 and M5 are given,and the results are then compared and analyzed with the value calculated using an empirical formula,proposing the problems and suggestions on empirical formula revisions.In this study,by taking Tianjin seismic waves as the input ground motion,this study calculates the elasto-plastic responses of two different brick-wood rural buildings at different seismic peak accelerations and depicts the corresponding tensile damage nephograms.The damage characteristics and seismic weak part of the structure are also analyzed.The contrastive analysis on different masonry strengths shows that the masonry strength is a key factor affecting the seismic capability of the structure.更多还原