平面不规则RC框剪结构基于性能的减震设计方法

发布时间：2018-07-04 11:01

本文选题：平面不规则RC框剪结构 + 减震结构　；参考：《工程力学》2017年03期

【摘要】：在引入最不利输入角度的基础上,运用改进的基于多模态推覆分析法对平面不规则RC框剪结构进行减震设计。首先,利用MATLAB小波变换系数法,判别地震动的最不利输入角度;然后,根据结构提出的性能目标,以多模态推覆分析的设计方法为主,结合能力谱法计算结构所需的附加阻尼比,选择相应的粘滞阻尼器,合理布置阻尼器的位置;最后,利用扭转角能力法对比分析原结构和减震结构的抗扭性能。分析结果表明:对于平面不规则RC框剪结构,地震动输入角度对结构的抗震性能有不可忽略的影响;利用改进的基于多模态推覆分析法对结构进行减震设计后可达到预先提出的性能目标,减小结构的扭转位移比,提高结构的抗震性能。
[Abstract]:On the basis of introducing the most unfavorable input angle, an improved multi-modal push-over analysis method is used to design the plane irregular RC frame-shear structure. Firstly, the wavelet transform coefficient method of MATLAB is used to distinguish the most unfavorable input angle of ground motion, and then, according to the performance target proposed by the structure, the design method of multi-modal nappe analysis is used. Combined with the capacity spectrum method to calculate the additional damping ratio of the structure, the corresponding viscous dampers are selected, and the location of the dampers is reasonably arranged. Finally, the torsion angle ability method is used to compare and analyze the torsional performance of the original structure and the damping structure. The results show that: for plane irregular RC frame-shear structure, the seismic behavior of RC frame shear structure can not be ignored by the input angle of ground motion. The improved multi-modal push-over analysis method can be used to reduce the torsional displacement ratio of the structure and improve the seismic performance of the structure.
【作者单位】：兰州理工大学防震减灾研究所;兰州理工大学西部土木工程防灾减灾教育部工程研究中心;
【基金】：国家自然科学基金项目(51178211)
【分类号】：TU352.11

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