短型长度系数对耗能梁抗震性能的影响试验及有限元研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (10) : 31-42.

论文

熊礼全1，潘星月1，程龙飞1，门进杰2，陈大刚3，向征宇3

作者信息 +

Experimental and finite element research on seismic performance of replaceable links considering the short length ratios

XIONG Liquan1，PAN Xingyue1，CHENG Longfei1，MEN Jinjie2，CHEN Dagang3，XIANG Zhengyu3

Author information +

文章历史 +

摘要

与传统框架结构体系相比，带可更换构件的框架结构体系能够实现震后建筑结构功能快速可恢复，减少地震作用对建筑结构正常生活和生产的影响。为研究可更换耗能梁的抗震性能，共设计并制作4个试验试件，对其进行低周反复加载，研究其破坏特征、滞回性能、骨架曲线。利用ABAQUS建立了可更换耗能梁精细化有限元分析模型，研究短型长度系数对可更换耗能梁抗震性能的影响规律，分析建模方法的可靠性。研究表明：试验中可更换耗能梁发生剪切屈服型与弯剪屈服型两类破坏模式，破坏特征包括腹板-加劲肋焊缝撕裂、翼缘屈曲和端板焊缝撕裂。试件具有良好的承载力与变形能力，能够实现震后可更换；有限元分析与试验结果吻合良好，建模方法可行。随着试件长度系数的增加，耗能梁的承载力、变形、耗能能力等均减弱，试件翼缘抗剪贡献可达梁段抗剪承载力的10%以上。与Popov等学者的建议值1.6相比，耗能梁的长度系数接近1.4时，试件破坏模式由剪切型破坏向弯剪型破坏模式转变；提出了剪切型可更换耗能梁抗剪承载力的计算公式，可供工程设计参考使用。

Abstract

Compared with the traditional frame structures, the novel frame structure with replaceable links can realize the rapid recovery of building occupancy after seismic input, so they are capable of reducing structural damage and ensuring continued use of the structure. In order to study the seismic performance of the replaceable links, a total of four test specimens were designed. Then a low-cycle reversed loading test was carried out to focus on the failure characteristics, hysteretic performance and skeleton curves. ABAQUS was used for establishing the refined analysis model of the replaceable links to evaluate the change rule of seismic performance of the links by the link short length ratios and analyse the reliability of numerical simulation analysis method. The results indicated that the failure modes of specimens included two types of shear failure and bending-shear failure, those of which included web-to-stiffener weld tear, web buckling and flange-to-end plate weld tear. All tested specimens presented very stable seismic performance and replaceability. The numerical analysis results agreed well with the experimental results and the simulation method is feasible. Along with an increase of the link short length ratios, the bearing capacity, deformation and energy dissipation capacity of the specimens weaken, respectively; at the same time, the shear contribution of flanges for the link models developed beyond 10% of the plastic shear strength. The shear failure mode of the specimens changed to bending-shear behavior reached approximately 1.4, lower than a value of 1.6 recommended by Popov et al. The calculation formula of shear capacity of the replaceable links after earthquake is put forward, which can be used for design evaluation of engineering.

导出引用

熊礼全1，潘星月1，程龙飞1，门进杰2，陈大刚3，向征宇3. 短型长度系数对耗能梁抗震性能的影响试验及有限元研究[J]. 振动与冲击, 2023, 42(10): 31-42

XIONG Liquan1，PAN Xingyue1，CHENG Longfei1，MEN Jinjie2，CHEN Dagang3，XIANG Zhengyu3. Experimental and finite element research on seismic performance of replaceable links considering the short length ratios[J]. Journal of Vibration and Shock, 2023, 42(10): 31-42

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