带灌浆套筒连接的预制纤维加固混凝土梁柱连接的抗震性能数值模拟研究

IF 3.6 3区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Mei-Ling Zhuang, Jinsheng Cheng, Dongsong Fei, Chuanzhi Sun, Zhenbo Wang, Baodong Chen, Yan Qiao
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引用次数: 0

摘要

根据现有的实验数据,首先在 OpenSees 软件中开发了四种预制纤维加固混凝土梁柱连接试件的纤维模型,这些试件采用灌浆套筒连接。然后,将试件的模拟抗震性能与实验结果进行比较。最后,进一步对轴向荷载比和剪跨比对试件抗震性能的影响进行了数值研究。结果表明,Concrete02 材料模型和钢筋材料模型可分别精确模拟混凝土和钢筋的构成关系;梁柱连接单元可精确模拟连接区的不同破坏行为。纤维增强混凝土可显著改善试件的抗震性能。模拟抗震性能指标的相对误差约为 15%。建议预制 FRC BCJ 的最佳剪跨比值为 2.0-2.5。轴载比对 PBCJs-CM 抗震性能的影响非常小,在预制 FRC BCJs 的剪跨比值适中的情况下,轴载比的影响可以忽略不计。本文所建立的纤维模型可为后续研究带灌浆套筒连接的预制纤维增强混凝土梁柱连接试件提供数值模拟基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical Simulation Study on the Seismic Performance of Prefabricated Fiber-Reinforced Concrete Beam–Column Joints With Grouted Sleeve Connections

Based on the available experimental data, fiber models for four prefabricated fiber-reinforced concrete beam–column joint specimens with grouted sleeve connections are first developed in OpenSees software. Then, the simulated seismic performance of the specimens is compared with the experimental results. Finally, the effects of axial load ratio and shear-to-span ratio on the seismic performance of the specimens are further investigated numerically. The results indicate that Concrete02 material model and Reinforcing Steel material model can accurately simulate the constitutive relationship of concrete and reinforcing steel, respectively; the beam–column joint elements can accurately simulate different damage behaviors of the joint zone. Fiber-reinforced concrete can significantly improve the seismic performance of the specimens. The relative errors of the simulated seismic performance indexes are about 15%. It is recommended that the optimum value of shear-to-span ratio for prefabricated FRC BCJs is 2.0–2.5. The effect of axial load ratio on the seismic behavior of PBCJs-CM is very small, and can be negligible in the case that the prefabricated FRC BCJs has a moderate value of shear-to-span ratio. The fiber model developed in this article can provide a numerical simulation basis for subsequent studies of prefabricated fiber-reinforced concrete beam–column joint specimens with grouted sleeve connections.

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来源期刊
International Journal of Concrete Structures and Materials
International Journal of Concrete Structures and Materials CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL
CiteScore
6.30
自引率
5.90%
发文量
61
审稿时长
13 weeks
期刊介绍: The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on Properties and performance of concrete and concrete structures Advanced and improved experimental techniques Latest modelling methods Possible improvement and enhancement of concrete properties Structural and microstructural characterization Concrete applications Fiber reinforced concrete technology Concrete waste management.
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