Combined Application of Three Nondestructive Testing Methods in Simulation Test of a Large Concrete-Filled Steel Tube

Zhou, Ming; Guo, Zhong Yu; Shen, Qiong Fei; Li, Zheng Bo

doi:10.4028/www.scientific.net/amr.738.121

Cited by 3 publications

(1 citation statement)

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“…In order to systematically sort out existing non-destructive testing techniques for interfacial defect detection in SCCS, comprehensive literature reviews have been performed [1]. In general, the bond-slip values can be accurately measured using embedded slip meters [3], LVDTs [4], and strain gauges [5,6]. However, these methods are incapable of assessing the degradation degree of adhesive layer and depth of debonding and cavity.…”

Section: Introductionmentioning

confidence: 99%

Dispersion characteristics of surface wave in SCCS: theoretical analysis, numerical simulation and MASW-based NDT

Chen¹,

Gan²,

Li³

et al. 2023

Smart Mater. Struct.

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To fully validate the feasibility of multichannel analysis of surface waves (MASW)-based interfacial debonding detection for steel-concrete composite structures (SCCS), dispersion characteristics of surface waves in SCCS are systematically investigated using theoretical analysis and elaborate 3D numerical simulations. First, the influences of material strength and thickness of concrete core, steel plate thickness on the dispersion figures are analyzed based on the theoretical dispersion characteristic of Rayleigh wave. Scientific layering strategy, including single steel plate, double-layer, and three-layer medium assumptions, is investigated using the theoretical dispersion analysis of Lamb wave. Besides, the dispersion characteristics of surface wave in circular steel pipes are calculated to determine the appropriate theoretical dispersion curves for MASW measurement. Finally, the stress wave propagation processes in SCCSs with various internal structures, including stiffeners, studs, and diaphragms, as well as the debonding width, are simulated using 3D numerical simulation to validate the research finding of theoretical analysis and detectability of MASW-based nondestructive testing on interfacial debonding defects in rectangular and circular concrete-filled steel tubulars. The research findings of this study are the cornerstone of experimental study and essential theoretical support for identifying interfacial debonding and bond-slip damage of SCCS components utilizing MASW method.

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