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Finite element model based test and analysis on ACHC short columns and hoop coefficient

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Abstract

In order to promote the application of angle-steel confined high-strength concrete (ACHC) columns in new construction and reinforcement projects of civil engineering, this paper designs 15 groups of ACHC short columns with a shear span ratio of 1.5 under axial compression by taking the hoop coefficient, strength grade of concrete and yield strength of steel as parameters. Based on the constitutive model of steel and confined concrete and considering hoop effect, the simulation analysis on them was carried out by ANSYS software, and the rationality of finite element modelling is verified by comparing it with the experimental data. The author investigated the influence of different hoop coefficients, different concrete strength grades and different yield strength of steel to the mechanic behaviour of ACHC short columns, and the results show that the influence of hoop coefficient to the bearing capacity and ductility is more significantly than other parameters. Considering the hoop effect of batten plate to concrete, the linear relationship between the influence factor of batten plates and the hoop coefficient is inverted by using 1stopt software. At last, the calculation formula of ultimate bearing capacity of ACHC short columns is gotten, and the design method and suggestion of short columns are put forward.

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Abbreviations

\(f_{cc}\) :

Compressive strength of confined high-strength concrete

\(f_{co}\) :

Compressive strength of non-restraint high-strength concrete

\(\varepsilon _{cc }\) :

Peak strains of constraint high-strength concrete

\(\varepsilon _{co }\) :

Peak strains of non-restraint high-strength concrete

\(f_{c}\) :

Current stress of the high-strength concrete

\(\varepsilon _{c}\) :

Strain of the high-strength concrete

\(E_{c}\) :

Elastic modulus of concrete

\(E_{sec}\) :

Secant modulus of confined concrete’s peak strain point

\(f_{r}\) :

Constraint stress of transverse steel plate

\(k_{e }\) :

Effective confinement factor

\(A_{e}\) :

Effective constraint area of steel plate to core high-strength concrete

\(A_{cc}\) :

Core concrete area surrounded by steel plate section centroid after deducting the longitudinal angle-steel area

\(A_{c}\) :

Core concrete area surrounded by steel plate section centroid

\(\rho _{cc}\) :

Ratio of vertical steel plate’s area and the area of core concrete surrounded by section steel plate’s centroid

\(w_i^{\prime } \) :

Clear distance of the two adjoining longitudinal angle-steels

\({s}'\) :

Clear space between two battens

\(b_{c}\) :

Centroid distance of external two ring steel plates along x directions

\(d_{c}\) :

Centroid distance of external two ring steel plates along y directions

\(f_{r }\) :

Transverse plate’s constraint stress

\(f_r^{\prime } \) :

Effective restraint stress

\(A_{s}\) :

Section area of angle steels

\(f_{y }\) :

Yield strength of angle steels

\(\alpha _{s}\) :

Effect coefficient of batten plates spacing

\(\lambda _{t }\) :

Hoop coefficient

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Acknowledgements

The research work reported herein was made possible by the financial support from National Natural Science Foundation of China (No.51178087); Natural Science Foundation of Heilongjiang Province (No.E201336); PetroChina Innovation Foundation (No.2016D-5007-0608); Nurturing Foundation of Northeast Petroleum University of National Natural Science Foundation of China (No.NEPUPY-1-16); Project of China Petroleum and Chemical Industry Association (No.2017-11-05); University Graduate Innovation Project of Northeast Petroleum University (No.YJSCX2016-031NEPU) and Special Foundation of The Education Department of Heilongjiang Province of Northeast Petroleum University Dominant research direction (No.2016YSFX-02).

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Authors and Affiliations

  1. Department of Civil and Architecture Engineering, Northeast Petroleum University, 199 Development Road, High-Tech Development Zone, Daqing, Heilongjiang, People’s Republic of China

    Jing Ji, Wenfu Zhang, Chaoqing Yuan, Yingchun Liu, Zhichao Xu, Yang Wang & Xiaokun Chen

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Correspondence to Jing Ji.

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Ji, J., Zhang, W., Yuan, C. et al. Finite element model based test and analysis on ACHC short columns and hoop coefficient. Cluster Comput 22 (Suppl 3), 5333–5345 (2019). https://doi.org/10.1007/s10586-017-1230-8

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