Acoustic Emission characteristics and damage evolution of Concrete-Encased CFST columns under compressive load

被引:3
作者
Shen, Wei [1 ]
Bai, Hao [1 ]
Wang, Fei [1 ]
Li, Cong [1 ,2 ]
Du, Fangzhu [3 ]
机构
[1] Guangxi Univ, Sch Civil Engn & Architecture, State Key Lab Featured Met Mat & Life cycle Safety, Nanning 530004, Peoples R China
[2] Fujian Univ Technol, Sch Civil Engn, Fuzhou 350118, Peoples R China
[3] Shandong Jianzhu Univ, Sch Civil Engn, Jinan 250101, Peoples R China
关键词
Concrete-Encased CFST column; Acoustic Emission; Failure mechanism; Damage assessment; B-VALUE ANALYSIS; SUSTAINED LOAD; STUB COLUMNS; BEHAVIOR; CLASSIFICATION;
D O I
10.1016/j.engfracmech.2024.110578
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Concrete-Encased Concrete Filled Steel Tubular (CE-CFST) is usually served as a compression member in engineering structures due to its high performance. It is crucial to reveal its compressive failure mechanism and the damage evolution law. This study used Acoustic Emission (AE) technology to monitor the compressive failure behavior of seven groups of CE-CFST columns with different diameter-width ratio, slenderness ratio and eccentricity, and then the AE signal characteristics and structural damage evolution law were discussed. Results show that the curve of AE characteristics can be used for effectively identifying the damage stages of CE-CFST structures. The failure process can be divided into six stages: initial compaction, stable growth of micro cracks, unstable propagation of macro cracks, collapsing of the outer RC structure, bulging of the core CFST structure and overall failure. The AE characteristic parameters, RA-AF value and b value are closely related to stress and crack of structure, and can be used for early warning of structural failure during the stage of unstable crack propagation. Particularly, the failure of outer concrete can be judged as b value drops to the minimum. The current study is of great significance for understanding the damage evolution process and achieving damage assessment of CE-CFST structures.
引用
收藏
页数:21
相关论文
共 50 条
  • [21] Experimental performance of concrete-encased CFST columns subjected to full-range fire including heating and cooling
    Zhou, Kan
    Han, Lin-Hai
    ENGINEERING STRUCTURES, 2018, 165 : 331 - 348
  • [22] Compressive strength of high strength concrete-encased composite columns with noncompact and slender steel angles
    Lim, Jong-Jin
    Kim, Yeon-Hee
    Eom, Tae-Sung
    JOURNAL OF BUILDING ENGINEERING, 2022, 51
  • [23] Modelling the behaviour of concrete-encased concrete-filled steel tube (CFST) columns subjected to full-range fire
    Zhou, Kan
    Han, Lin-Hai
    ENGINEERING STRUCTURES, 2019, 183 : 265 - 280
  • [24] Numerical analysis of the eccentric compression performance of concrete-encased CFST long columns with two-stage initial stresses
    Fang, Bide
    Tu, Bing
    STRUCTURES, 2025, 73
  • [25] Concrete-encased CFST members with circular sections under laterally low velocity impact: Analytical behaviour
    Hu, Chang-Ming
    Han, Lin-Hai
    Hou, Chuan-Chuan
    JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, 2018, 146 : 135 - 154
  • [26] Seismic performance of GFRP tube concrete-encased steel composite columns under axial compression
    Zhang, Haixia
    Ju, Shilong
    Chen, Huan
    JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, 2023, 200
  • [27] Experimental and numerical studies of concrete-encased concrete-filled steel tube stub columns under uniaxial and biaxial eccentric compression
    Ma, You-Xin
    Zhao, Ou
    Tan, Kang Hai
    ENGINEERING STRUCTURES, 2021, 232
  • [28] Damage evolution and avalanche characteristics of concrete under salt-freezing action by acoustic emission
    Zhao, Yunfeng
    Chen, Minghui
    Jiang, Xiang
    Cao, Xuepeng
    Qin, Binbin
    DEVELOPMENTS IN THE BUILT ENVIRONMENT, 2025, 21
  • [29] Finite element analysis of square concrete-filled steel tube (CFST) columns under axial compressive load
    Ouyang, Y.
    Kwan, A. K. H.
    ENGINEERING STRUCTURES, 2018, 156 : 443 - 459
  • [30] Performance and strength analysis of concrete-encased steel plate walls under tensile-flexural-shear load
    Meng, Chunli
    Ke, Xiaojun
    Su, Yisheng
    JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, 2023, 201