Seismic behavior of textile-reinforced concrete–strengthened RC columns under different axial compression ratios

Liu Ming,Yin Shi-Ping,Cong Xi

doi:10.1177/1558925019865705

Liu Ming, Yin Shi-Ping + Show 1 more

Open Access

https://doi.org/10.1177/1558925019865705

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Abstract

To study the effect of various axial compression ratios on the seismic behavior of reinforced concrete (RC) columns strengthened with textile-reinforced concrete, in this study, an RC column model is established using the finite element analysis software, ABAQUS. This model’s seismic performance under earthquakes is investigated, and the numerical analysis results of the two test pieces are compared with the test results to verify the correctness of the model. The results show that the initial stage of RC loading is under the three-way restraint of the axial force and textile-reinforced concrete material. The yield load and peak load of the textile-reinforced concrete–strengthened RC column increase with the increase in the axial compression ratio. However, the increase in the axial pressure during the loading process accelerates the crack development. The displacement ductility coefficient and the energy dissipation capacity of the specimen are reduced as the axial compression ratio increases. The numerical calculation results of the textile-reinforced concrete–strengthened RC column are in good agreement with the experimental results, indicating that the numerical model based on ABAQUS is reasonable.

Highlights

In recent years, earthquake disasters have frequently occurred around the globe
Many building structures are subject to brittle failure due to insufficient ductility and strength of the column members, which leads to the collapse of the building structure
The results show that textile-reinforced concrete (TRC) can effectively restrain concrete in the core area of the reinforced concrete (RC) column, reduce the damage height of the plastic hinge area of the test piece, and improve the failure mode of the RC column

Summary

Introduction

Earthquake disasters have frequently occurred around the globe. Many building structures are subject to brittle failure due to insufficient ductility and strength of the column members, which leads to the collapse of the building structure. This article selects the specimen of Yin et al.[14] as the simulation research object; finite element analysis was carried out, and the numerical calculation results and experimental results were compared to verify the feasibility of using ABAQUS for the physical modeling and finite element analysis of TRC-strengthened RC columns.

Results

Conclusion