橡胶混凝土细观性能的数值分析  

Numerical analysis of mesoscopic properties of rubber concrete

作　　者：罗麒锐 王威[1] 郭琦[1] 孙壮壮 王冰洁 LUO Qirui;WANG Wei;GUO Qi;SUN Zhuangzhuang;WANG Bingjie(School of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《地震工程与工程振动》2020年第5期74-83,共10页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51878548,51578449)。

摘　　要：从细观角度出发,以骨料、橡胶颗粒、砂浆基质、骨料砂浆界面、橡胶砂浆界面及砂浆-砂浆界面六相成分组成的橡胶混凝土细观有限元模型为切入点,建立了基于黏结裂缝模型的混凝土细观模型,以单轴受拉为例,研究了掺量及粒径对橡胶混凝土细观性能的影响。结果表明:合理减小橡胶颗粒的粒径可以使橡胶更为均匀的分布在砂浆基质中,从而提高强度和变形能力,这种方法是一种有效改善橡胶混凝土力学性能的方式;采用黏结裂缝单元建立的细观模型可以很好解决小粒径的仿真问题。From the perspective of mesoscopic view,the mesoscopic rubber concrete composed of six components containing with aggregate,rubber granule,mortar matrix,aggregate mortar interface,rubber mortar interface and mortar-mortar interface is used as the entry point,and the basis model is established.The uniaxial tension of meso-concrete model is taken as an example to study the effect of the amount and particle size on the mesoscopic performance.The results show that reasonable reduction of the particle size of the rubber can make the particle more evenly distributed in the mortar matrix,thereby improving the strength and deformability.This method is a way to effectively improve the mechanical properties of rubber concrete.Besides,the established mesoscopic model could well solve the small particle size simulation problem.

关 键 词：橡胶混凝土 细观仿真 随机骨料模型 黏结裂缝模型 小粒径 掺量 

分 类 号：TU318[建筑科学—结构工程]