纤维增强混凝土耗能墙-钢筋混凝土框架结构抗震性能数值研究

Numerical Study on Seismic Performance of HPFRC Energy Dissipation Wall-RC Frame Structure

在高性能纤维增强混凝土(HPFRC)耗能墙-钢筋混凝土(RC)框架结构抗震性能试验研究的基础上,考虑了RC框架混凝土强度等级、框架柱配筋率、框架柱截面尺寸三个因素,进行了有限元模拟分析。结果表明:建立的HPFRC耗能墙-RC框架结构有限元模型较为准确,有限元计算结果与试验结果吻合较好;随着RC框架混凝土强度等级的提升,试件各个荷载特征点的水平承载力均有所提高,但变形能力变化不大;随着框架柱配筋率和框架柱截面尺寸的增大,试件各个荷载特征点的水平承载力均明显提高,极限位移也有所增加;为了保证此类结构的抗震性能,针对RC框架混凝土强度等级、框架柱配筋率和框架柱截面尺寸,提出了可供设计参考的相关建议值。

Based on the experimental study on seismic performance of high performance fiber reinforced concrete(HPFRC)energy dissipation wall-reinforced concrete(RC)frame structure,three factors of RC frame concrete strength grade,frame column reinforcement ratio,and frame column section size were considered to carried out finite element simulation analysis.The results show that the established finite element model of HPFRC energy dissipation wall-RC frame structure is accurate,and the finite element calculation results are in good agreement with the experimental results.With the increase of the RC frame concrete strength grade,the horizontal bearing capacity of each load characteristic point of the specimen is improved,but the deformation capacity changes little.With the increase of the frame column reinforcement ratio and the frame column section size,the horizontal bearing capacity of each load characteristic point of the specimen is significantly increased,and the ultimate displacement is also increased.In order to ensure the seismic performance of this kind of structure,the relevant recommended values for design reference are put forward for the RC frame concrete strength grade,frame column reinforcement ratio and frame column section size.