Study on Mechanical Properties and Damage Evolution of High-Porosity Concrete under Cyclic Loading and Unloading

Understanding the mechanical properties and energy response of high-porosity concrete under the cyclic loading and unloading is the foundation of road construction in sponge city. In this study, the concrete with the porosity of 15% was taken as the research object, and the cyclic loading and unload...

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Autores principales:	Dong Zhang, Ai-hong Lu, Xia Wang, Yu Xia, Si-yu Gong, Lei Sun, Ran-fang Zuo, Yang Dong
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/2b75b874492649bb8ae2a092ae07149e
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spelling	oai:doaj.org-article:2b75b874492649bb8ae2a092ae07149e2021-11-29T00:56:06ZStudy on Mechanical Properties and Damage Evolution of High-Porosity Concrete under Cyclic Loading and Unloading1687-809410.1155/2021/6594889https://doaj.org/article/2b75b874492649bb8ae2a092ae07149e2021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/6594889https://doaj.org/toc/1687-8094Understanding the mechanical properties and energy response of high-porosity concrete under the cyclic loading and unloading is the foundation of road construction in sponge city. In this study, the concrete with the porosity of 15% was taken as the research object, and the cyclic loading and unloading tests on the high-porosity concrete were performed under the stress amplitude of 25 MPa, 30 MPa, and 35 MPa in the elastic stage. The effects of stress amplitude and cycle number on the mechanical characteristics and damage evolution law of concrete were obtained. The experimental results show the following. (1) With the increase of cycle number, the loading and unloading elastic modulus of concrete under different stress amplitudes first increases and then decreases; the greater the stress amplitude, the faster the growth and deceleration of the loading and unloading elastic modulus. (2) With the increase of the cycle number, the peak strain and residual plastic deformation increase. (3) The greater the stress amplitude, the higher the damage of concrete; with the increasing number of cyclic loading and unloading, the damage of concrete is enhanced gradually. When the damage variable value is 1, the relationship between the cycle number and the initial stress amplitude satisfies a negative exponential function.Dong ZhangAi-hong LuXia WangYu XiaSi-yu GongLei SunRan-fang ZuoYang DongHindawi LimitedarticleEngineering (General). Civil engineering (General)TA1-2040ENAdvances in Civil Engineering, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Engineering (General). Civil engineering (General) TA1-2040 Dong Zhang Ai-hong Lu Xia Wang Yu Xia Si-yu Gong Lei Sun Ran-fang Zuo Yang Dong Study on Mechanical Properties and Damage Evolution of High-Porosity Concrete under Cyclic Loading and Unloading
description	Understanding the mechanical properties and energy response of high-porosity concrete under the cyclic loading and unloading is the foundation of road construction in sponge city. In this study, the concrete with the porosity of 15% was taken as the research object, and the cyclic loading and unloading tests on the high-porosity concrete were performed under the stress amplitude of 25 MPa, 30 MPa, and 35 MPa in the elastic stage. The effects of stress amplitude and cycle number on the mechanical characteristics and damage evolution law of concrete were obtained. The experimental results show the following. (1) With the increase of cycle number, the loading and unloading elastic modulus of concrete under different stress amplitudes first increases and then decreases; the greater the stress amplitude, the faster the growth and deceleration of the loading and unloading elastic modulus. (2) With the increase of the cycle number, the peak strain and residual plastic deformation increase. (3) The greater the stress amplitude, the higher the damage of concrete; with the increasing number of cyclic loading and unloading, the damage of concrete is enhanced gradually. When the damage variable value is 1, the relationship between the cycle number and the initial stress amplitude satisfies a negative exponential function.
format	article
author	Dong Zhang Ai-hong Lu Xia Wang Yu Xia Si-yu Gong Lei Sun Ran-fang Zuo Yang Dong
author_facet	Dong Zhang Ai-hong Lu Xia Wang Yu Xia Si-yu Gong Lei Sun Ran-fang Zuo Yang Dong
author_sort	Dong Zhang
title	Study on Mechanical Properties and Damage Evolution of High-Porosity Concrete under Cyclic Loading and Unloading
title_short	Study on Mechanical Properties and Damage Evolution of High-Porosity Concrete under Cyclic Loading and Unloading
title_full	Study on Mechanical Properties and Damage Evolution of High-Porosity Concrete under Cyclic Loading and Unloading
title_fullStr	Study on Mechanical Properties and Damage Evolution of High-Porosity Concrete under Cyclic Loading and Unloading
title_full_unstemmed	Study on Mechanical Properties and Damage Evolution of High-Porosity Concrete under Cyclic Loading and Unloading
title_sort	study on mechanical properties and damage evolution of high-porosity concrete under cyclic loading and unloading
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/2b75b874492649bb8ae2a092ae07149e
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Study on Mechanical Properties and Damage Evolution of High-Porosity Concrete under Cyclic Loading and Unloading

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