单轴受压状态下堆石混凝土的破坏形态和力学性能分析  

Composite material theory predicts elastic modulus of rockfill concrete

作　　者：李艳 梁亦辉 唐晓玲 杨林 LI Yan;LIANG Yihui;TANG Xiaoling;YANG Lin(College of Civil Engineering,Guizhou University,Guiyang 550000,China)

机构地区：[1]贵州大学土木工程学院,贵州贵阳550000

出　　处：《混凝土》2022年第12期6-10,16,共6页Concrete

基　　金：国家自然科学基金(52069004)。

摘　　要：首先研究了贵州某水库堆石混凝土在进行弹性模量试验过程中的破坏形态,发现堆石混凝土试件在破坏时主要产生竖向裂缝和斜向裂缝;其次采用伸缩变形后的椭圆来代表堆石形状,使用带有沉降域的沉降算法来模拟堆石下降的过程,建立了堆石混凝土三相随机数值模型,将数值模拟的结果与试验结果进行对比,两者的相对误差只有4.7%。该模型能较好地反映堆石的随机分布与堆石骨架,具有一定的可靠性,为堆石混凝土的研究提供了一种新的随机模型。It firstly studies the failure form of rockfill concrete in a reservoir in Guizhou during the elastic modulus test.It is found that the rockfill concrete specimen mainly produces vertical cracks and oblique cracks when it is damaged.Secondly,the ellipse after expansion and deformation is used to represent the shape of the rockfill,the settlement algorithm with the settlement domain is used to simulate the process of rockfill falling,and a three-phase random numerical model of rockfill concrete is established.The numerical simulation results are compared with the test results,and the relative error between the two is only 4.7%.The model can better reflect the random distribution of rockfill and the rockfill skeleton,and has certain reliability.It provides a new random model for rockfill concrete research.

关 键 词：堆石混凝土 破坏形态 弹性模量 数值模拟 

分 类 号：TU528.01[建筑科学—建筑技术科学]