Nadom K. Mutlib^1,*, Muna N. Ismael¹, Shahrizan Baharom²

Structural Durability & Health Monitoring, Vol.15, No.3, pp. 227-246, 2021, DOI:10.32604/sdhm.2021.010725

Abstract Structural health monitoring employs different tools and techniques to provide a prediction for damages that occur in various structures. Damages such as debond and cracks in concrete-filled steel tube column (CFST) are serious defects that threaten the integrity of the structural members. Ultrasonic waves monitoring applied to the CFST column is necessary to detect damages and quantify their size. However, without appropriate signal processing tools, the results of the monitoring process could not be crucial. In this research, a monitoring process based on a Multiphysics numerical simulation study was carried out. Two signal processing tools: short time Fourier transform (STFT)… More >

Qing Li Wang, Yuan Che, Yong Bo Shao, Rui Lin Li

The International Conference on Computational & Experimental Engineering and Sciences, Vol.16, No.4, pp. 119-120, 2011, DOI:10.3970/icces.2011.016.119

Abstract Based on analysis of the hysteretic experimental results of the concrete filled circular CFRP-steel tubular (C-CFRP-CFST) beam-columns, it shows that the deflection curves of all the specimens are close to half sinusoidal shape. The steel tube and the CFRP material can work concurrently both in longitudinal and transverse directions. Additionally, the longitudinal strain and the transverse strain at a same point have opposite action. Analysis indicates that there is no strength degradation. The axial compression ratio and strengthening factor of the longitudinal CFRP can enhance the strength and the stiffness of the members and they can also delay the stiffness… More >

Zhi-quan Zhang, Jia-xiang Chi, Yu-fen Zhang

The International Conference on Computational & Experimental Engineering and Sciences, Vol.16, No.3, pp. 95-96, 2011, DOI:10.3970/icces.2011.016.095

Abstract This paper concentrates on the compressive strength of steel tube in Concrete-filled steel tube (CFST) column. Through an elasto-plastic limit analysis based on Twin Shear Unified Strength Theory (TSUST), the vertical load capacity of the steel tube alone was analyzed by adopting a parameter b, which varies from 0 to 1. And the strength reduction factor has been derived by total theory of plasticity. A new analytical formula, capable of predicting the axial bearing capacity of the CFST stub columns subjected to axial compression, has been developed based on the linear approximation of Mises yield criterion among TSUST. And There… More >

K. Luo¹, Y. L. Pi¹, W. Gao¹, M. A. Bradford¹

CMES-Computer Modeling in Engineering & Sciences, Vol.95, No.1, pp. 31-58, 2013, DOI:10.3970/cmes.2013.095.031

Abstract This paper presents a theoretical analysis for the time-dependent nonlinear behaviour and buckling of shallow concrete-filled steel tubular (CFST) arches under a sustained central concentrated load. The virtual work method is used to establish the differential equations of equilibrium for the time-dependent behaviour and buckling analyses of shallow CFST arches, and the age-adjusted effective modulus method is adopted to model the creep behaviour of the concrete core. Analytical solutions of time-dependent displacements and internal forces of shallow CFST arches are derived. It has been found that under a sustained central concentrated load, the deformations and bending moments in a shallow… More >