局部平均刚度比对底框结构抗震性能的影响

发布时间：2018-06-09 14:08

本文选题：局部平均刚度比 + 底框结构　；参考：《哈尔滨工程大学学报》2015年12期

【摘要】：为了研究平面内刚度不均匀性对底框结构抗震性能的影响,提出了局部平均刚度比的概念。建立具有不同局部平均刚度比的ABAQUS有限元模型,并进行弹塑性时程分析。分析结果表明:平面内刚度分布不均匀会导致局部墙体严重破坏,从而影响结构整体的安全性。局部平均刚度比作为衡量同一楼层平面内局部区域刚度大小的指标,其值过低时会造成该区域抗侧刚度不足,墙体破坏严重;过高时会造成薄弱部位转移,对平面内其他区域的墙体产生不利影响。综合分析以上结果,建议底框结构的局部平均刚度比控制在0.66~1.30,该结论可作为我国抗震规范平面内刚度分布的补充规定,为结构设计提供参考。
[Abstract]:In order to study the effect of the inhomogeneity of in-plane stiffness on the seismic behavior of bottom frame structures, the concept of local average stiffness ratio is proposed. Abaqus finite element model with different local mean stiffness ratio was established and elastic-plastic time history analysis was carried out. The results show that the uneven distribution of stiffness in the plane will lead to serious damage to the local wall, thus affecting the overall safety of the structure. The local average stiffness ratio is used as an index to measure the stiffness of the local area in the plane of the same floor. When the value is too low, the lateral stiffness of the area will be insufficient, the wall will be damaged seriously, and the weak part will be transferred when the value is too high. Adverse effects on the walls of other areas in the plane. By synthetically analyzing the above results, it is suggested that the local average stiffness ratio of the bottom frame structure should be controlled at 0.66 ~ 1.30. The conclusion can be used as a supplementary stipulation for the stiffness distribution in the plane of the seismic code of our country, and can be used as a reference for the design of the structure.
【作者单位】：哈尔滨工程大学航天与建筑工程学院;中国地震局工程力学研究所地震工程与工程振动重点实验室;
【基金】：国家自然科学基金重大研究计划资助项目(91315301-10) 国家科技支撑计划资助项目(2015BAK17B06)
【分类号】：TU352.11;TU398.2

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