含铅阻尼器的自攻螺钉冷弯型钢整体结构减震性能及损伤演变

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (21) : 266-274.

论文

王曼,何浩祥，王宝顺，闫维明

作者信息 +

Aseismic performance and damage evolution of cold-formed thin-walled steel whole structure connected by self-tapping screws with lead damper

WANG Man, HE Haoxiang, WANG Baoshun, YAN Weiming

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文章历史 +

摘要

为探究铅阻尼器对基于自攻螺钉连接的冷弯薄壁型钢整体结构减震性能的影响及可行性，在分析单片墙体低周往复荷载试验结果的基础上，提出能够准确反映墙体滞回性能的冷弯薄壁型钢墙体和整体结构的有限元模型建立方法。提出采用基于刚度的时变损伤指数、基于弹塑性耗能差的时变损伤指数和时变延性系数对冷弯薄壁型钢整体结构进行深入的损伤演变分析通过对冷弯薄壁型钢整体结构的动力时程分析和损伤分析。建立典型冷弯薄壁型钢办公楼结构，并进行动力时程分析，研究不同地震幅值下冷弯薄壁型钢整体结构的减震效果。结果表明：铅阻尼器不仅能够明显改善单片剪力墙的力学性能和抗震性能，还可以显著降低大震下冷弯薄壁型钢整体结构的动力反应及损伤程度，具有良好的减震性能和应用前景。

Abstract

To study the damping effect and the feasibility of the lead damper for the cold formed steel structure with self-tapping screws, the experimental results are analyzed based on the monolithic wall low cycle loading test. The finite element model establishment method for accurately represent the wall hysteretic performance of cold-formed thin-walled steel wall and the overall structure is established. The time-varying damage index based on stiffness or elastic-plastic energy difference, and the time-varying ductility coefficient are used to analyze the damage evolution characteristics of the whole structure of cold-formed thin-walled steel. The dynamic time-history analysis and damage analysis of the whole structure of cold-formed thin-walled steel are carried out. A typical cold-formed thin-walled steel office building structure is established and dynamic time-history analysis was carried out to study the damping effect of the overall structure of cold-formed thin-walled steel under different seismic amplitudes. The results show that the lead damper can not only significantly improve the mechanical and seismic performance of the shear wall, but also significantly reduce the dynamic response and damage degree of the whole structure of the cold-formed thin-walled steel under large earthquakes. The whole system has good damping performance and application prospect.

导出引用

王曼,何浩祥，王宝顺，闫维明. 含铅阻尼器的自攻螺钉冷弯型钢整体结构减震性能及损伤演变[J]. 振动与冲击, 2021, 40(21): 266-274

WANG Man, HE Haoxiang, WANG Baoshun, YAN Weiming. Aseismic performance and damage evolution of cold-formed thin-walled steel whole structure connected by self-tapping screws with lead damper[J]. Journal of Vibration and Shock, 2021, 40(21): 266-274

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