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南京工业大学 土木工程学院,江苏南京 211816
许伟志(1990— ),男,博士,副教授. 研究方向:建筑结构抗震与减震控制. E-mail: xuwz@njtech.edu.cn
张天杨,博士生,E-mail: zhangtianyang@njtech.edu.cn
收稿日期:2025-03-28,
修回日期:2025-05-08,
网络出版日期:2025-05-19,
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许伟志,廖嘉俊,张天杨等.后张预应力混合框架结构抗震性能及减震加固研究[J].工程科学与技术,
XU Weizhi,LIAO Jiajun,ZHANG Tianyang,et al.Study on seismic performance and retrofitting of post-tensioned prestressed hybrid frame structures[J].Advanced Engineering Sciences,XXXX,XX(XX):1‒11.
许伟志,廖嘉俊,张天杨等.后张预应力混合框架结构抗震性能及减震加固研究[J].工程科学与技术, DOI:10.12454/j.jsuese.202500227.
XU Weizhi,LIAO Jiajun,ZHANG Tianyang,et al.Study on seismic performance and retrofitting of post-tensioned prestressed hybrid frame structures[J].Advanced Engineering Sciences,XXXX,XX(XX):1‒11. DOI: 10.12454/j.jsuese.202500227.
本文研究后张预应力混合连接(PTHC)节点的地震损伤机理及其损伤后加固的抗震性能演变。针对震损后的PTHC节点,提出采用可更换耗能元件进行加固的自复位预制节点(RSCPC),并推导该节点的理论滞回模型。与采用等效耗能阻尼器加固的等效耗能自复位节点(EEDRC)相比,RSCPC具有更小的残余变形和更高的承载能力。基于低周往复试验结果,建立PTHC、震损PTHC、RSCPC和EEDRC框架的数值模型,并进行增量动力分析,对比研究4种不同框架在极罕遇地震作用下的倒塌概率、残余变形和频率演化规律。研究表明,与震损PTHC框架相比,RSCPC和EEDRC框架的承载力和耗能能力均得到有效恢复,且抗震性能得到提升。在极罕遇地震作用下,RSCPC框架的倒塌概率较EEDRC框架降低17.20%,且震后残余变形普遍低于EEDRC框架,采用可更换耗能阻尼器加固震损PTHC框架的抗震性能较等效耗能阻尼器加固方案进一步提升。
This paper investigates the seismic damage mechanisms of post-tensioned prestressed hybrid connection (PTHC) joints and the evolution of seismic performance after post-damage reinforcement. For earthquake-damaged PTHC joints
a self-centering prefabricated joint (RSCPC) reinforced with replaceable energy-dissipating components is proposed
and the theoretical hysteresis model of this joint is derived. Compared with equivalent energy-dissipating self-centering joints (EEDRC) reinforced by equivalent energy-dissipating dampers
the RSCPC demonstrates smaller residual deformation and higher load-bearing capacity. Based on low-cycle reversed loading test results
numerical models of PTHC
earthquake-damaged PTHC
RSCPC
and EEDRC frames were established. Incremental dynamic analysis was conducted to comparatively study the collapse probability
residual deformation
and frequency evolution patterns of the four frame types under extremely rare earthquakes. The results indicate that compared with earthquake-damaged PTHC frames
both RSCPC and EEDRC frames effectively restore load-bearing capacity and energy dissipation capability while enhancing seismic performance. Under extremely rare earthquakes
the collapse probability of RSCPC frames decreases by 17.20% compared with EEDRC frames
with post-earthquake residual deformations generally lower than those of EEDRC frames. The seismic performance of earthquake-damaged PTHC frames reinforced with replaceable energy-dissipating dampers shows further improvement over equivalent energy-dissipating damper reinforcement solutions.
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