Study on failure mechanism and seismic performance of RC Frame-Infilled walls structures reinforced by CFRP

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2024-11-24 DOI:10.1016/j.engfailanal.2024.109114

Xuetan Zhang, Yang Zhou, Xiangyu Liu, Changda Wang, Zhiguo Sun

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引用次数: 0

Abstract

The reinforced concrete (RC) frame structure with continuous half-height infilled walls is a common structural form. However, the existence of infilled walls alters the structure’s force mechanism and failure mode, making the frame columns susceptible to brittle failure and adversely affecting the overall seismic performance. To enhance the seismic capacity of such systems, quasi-static tests were conducted on RC frame-infilled wall models reinforced with different CFRP methods. Based on the test results, numerical analysis models of RC frame-infilled walls were established to perform parametric studies and quantitatively assess the impact of various CFRP reinforcement methods on seismic performance. The results indicate that both full wrapping and strip reinforcement methods can improve the failure mode and enhance the seismic capacity of the frame-infilled wall structure, but the degree of improvement varies significantly. Compared to the unreinforced frame, the ductility, ultimate bearing capacity, initial stiffness, and energy dissipation of the fully wrapped and strip-reinforced frames increased by 42.86% and 58.76%, 30.43% and 10.65%, 68.76% and 9.55%, 298.01% and 340.92%, respectively. Considering the overall seismic demand and CFRP utilization rate, the strip reinforcement method is more suitable for the seismic strengthening of half-height infilled wall frame structures. When using the same amount of CFRP without other improvement measures, it is recommended that the ratio of strip spacing to strip width be between 1.1 and 1.25.

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CFRP 加固的 RC 框架填充墙结构的破坏机理和抗震性能研究

带有连续半高填充墙的钢筋混凝土（RC）框架结构是一种常见的结构形式。然而，填充墙的存在改变了结构的受力机制和破坏模式，使框架柱容易发生脆性破坏，对整体抗震性能产生不利影响。为了提高此类系统的抗震能力，对采用不同 CFRP 方法加固的 RC 框架填充墙模型进行了准静力试验。根据试验结果，建立了 RC 框架填充墙的数值分析模型，以进行参数研究并定量评估各种 CFRP 加固方法对抗震性能的影响。结果表明，全包和条带加固方法都能改善框架填充墙结构的破坏模式，提高其抗震能力，但改善程度差异显著。与未加固的框架相比，全包裹和条状加固框架的延性、极限承载力、初始刚度和耗能分别提高了 42.86% 和 58.76%、30.43% 和 10.65%、68.76% 和 9.55%、298.01% 和 340.92%。考虑到整体抗震要求和 CFRP 利用率，条带加固法更适合半高填充墙框架结构的抗震加固。在不采取其他改进措施的情况下，使用相同数量的 CFRP 时，建议带间距与带宽度之比介于 1.1 与 1.25 之间。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.