功能可恢复强脊框架结构抗震性能研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (6) : 1-10.

论文

功能可恢复强脊框架结构抗震性能研究

黄群贤1,2，林聪颖1,2，刘洋1,2，黄军3

作者信息 +

Seismic performance of an earthquake resilient strongback-frame structure

HUANG Qunxian1,2，LIN Congying1,2，LIU Yang1,2，HUANG Jun3

Author information +

文章历史 +

摘要

基于强脊机制、损伤控制和可更换等理念，提出新型震后功能可快速恢复强脊框架结构体系。为考察功能可恢复强脊框架结构抗震性能及震后可恢复性能，运用Sap2000软件对5个结构模型进行推覆分析，重点研究强脊框架结构的损伤机制、损伤演化、变形特征、抗震性能和震后可恢复性能等。提出不同水平地震作用下结构残余变形两阶段计算分析方法，以此评估结构震后的可恢复性能。计算结果表明，强脊系统可有效控制结构侧向变形，结构的层间位移角和损伤分布均匀，有效避免薄弱层破坏机制的形成，提升结构的抗震性能和抗倒塌性能。强脊系统能有效调动整体结构部件的能力储备，使结构具有更好的整体性。设置强脊系统的框架结构刚度、承载力、耗能能力等均得到明显提升，推覆曲线未出现承载力软化行为。经合理分级损伤设计，在强脊框架中设置可更换耗能件在地震中起到第一道防线作用，有效减小主体结构损伤和残余变形，显著提升结构的震后可恢复性能。

Abstract

Based on the strongback mechanism, damage control, and replaceable concept, an innovative earthquake resilient strongback-frame structure is proposed to minimize earthquake-induced damage and facilitate quick and economical post-earthquake repairs. To investigate the seismic performance and resilience of the strongback-frame structure, pushover analysis on five structural models was conducted with Sap2000 software. Particular emphasis was taken on the damage mechanism, damage evolution, deformation characteristics, seismic performance, and seismic resilience of the strongback-frame structure. A two-stage calculation method for the residual deformation is proposed to evaluate the seismic resilience of structures subjected to different magnitude earthquakes. The results show that the strongback system can effectively control the lateral deformation pattern of the structure, and the story drift ratio and damage distribute uniformly, which can avoid the formation of the weak-story failure mechanism and improve the seismic performance and collapse resistance of the structure. The strongback system can also effectively mobilize the reserve capacity of the overall structural components, which enhances the overall performance. The stiffness, strength, and energy consumption capacity of the strongback frame are significantly improved, and the pushover curves do not appear the strength softening behavior. After reasonably graded damage design, the replaceable energy dissipation components set in the strongback frame play the first line of defense role to reduce the structural damage and residual deformation, effectively improving the structure's seismic resilience.

导出引用

黄群贤1,2，林聪颖1,2，刘洋1,2，黄军3. 功能可恢复强脊框架结构抗震性能研究[J]. 振动与冲击, 2024, 43(6): 1-10

HUANG Qunxian1,2，LIN Congying1,2，LIU Yang1,2，HUANG Jun3. Seismic performance of an earthquake resilient strongback-frame structure[J]. Journal of Vibration and Shock, 2024, 43(6): 1-10

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