柔性连接AAC填充墙钢框架抗震性能影响因素数值分析

Numerical analysis of influence factors on seismic performance of flexible connection AAC infilled wall steel frame

为分析不同因素变化对柔性连接蒸压加气混凝土(autoclaved areated concrete,AAC)砌体填充墙钢框架抗震性能影响的趋势和显著性,基于拟静力试验结果验证了建模方式及参数选取的可行性,采用ABAQUS建立9个有限元正交模型,对模型轴压比、预留缝宽、耗能材料刚度和高跨比进行变参分析。研究结果表明:预留缝宽、耗能材料刚度、高跨比和轴压比对结构抗震性能指标影响的显著性依次降低。整体上,增大预留缝宽,减小耗能材料刚度、高跨比以及轴压比对提高结构的抗震性能有利。实际应用中建议柔性连接AAC墙框间缝宽取值在40 mm左右,缝间填充材料的刚度宜在100~500 N/mm之间。

In order to analyze the trend and significance of the influence of different factors on the seismic performance of flexible connection autoclaved areated concrete(AAC)masonry filled wall steel frame structures,the feasibility of the modeling method and parameters selection was verified based on the results of pseudo-static tests,nine orthogonal finite element models were established by ABAQUS,and variable parameter analysis was carried out on axial compression ratio,reserved seam width,spring stiffness and height span ratio of models.The results show that the effects of reserved joint width,stiffness of energy-consuming materials,height span ratio and axial compression ratio on seismic performance of the structure decrease successively.On the whole,it is beneficial to increase the reserved joint width,reduce the stiffness of energy-consuming materials,high span ratio and axial compression ratio to improve the seismic performance of the structure.In actual application,the recommended value for the joint width between flexible connection AAC wall and frames is around 40 mm,and the stiffness of the filler between reserved joints is between 100~500 N/mm.