Influence of static pre-loading on the dynamic bending strength of concrete with particle element modeling

被引：12

作者：

Wu MingXin ^{[1
]}

Zhang ChuHan ^{[1
]}

机构：

[1] Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China

来源：

SCIENCE CHINA-TECHNOLOGICAL SCIENCES | 2015年 / 58卷 / 02期

基金：

中国国家自然科学基金;

关键词：

concrete; static pre-loading; dynamic bending strength; rate effect; particle element modeling; SIMULATION; FRACTURE;

D O I：

10.1007/s11431-014-5671-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experimental tests show that static pre-loading has a significant effect on the dynamic strength of concrete. Based on meso-scale particle element model, numerical simulations of dynamic bending tests with pre-loading are performed. Complete stress strain relationships are then obtained. Significant increase in dynamic strength is found when the pre-loadings are imposed within the elastic limit of concrete. However, when the imposition of pre-loadings reaches the plastic or softening range, dynamic strengths may gradually decrease along with the increase in pre-loadings. The distribution of energy components and the failure modes are discussed to explain the mechanisms of the phenomena.

引用

页码：284 / 296

页数：13

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