摘要
为研究二干渠护坡塑性混凝土材料受物化损伤作用后拉、压力学变化特征,设计开展了浸泡时间、溶液浓度的多因素力学破坏试验。浸泡时间、溶液浓度与混凝土抗拉强度、抗压强度均为负相关关系,且浸泡浓度与抗压强度具有负比例线性函数关系,浸泡时间为24 h与72 h时溶液浓度2 g/L试样抗拉强度差幅为20.1%,而抗压强度差幅为37.5%,在浸泡时间24 h试验组下,溶液浓度增长2 g/L,试样抗拉强度、抗压强度分别平均减少20.6%、15.2%。浸泡时间愈长,物化损伤效应愈显著,且抗压强度受物化损伤影响敏感度低于抗拉强度。物化损伤程度不影响峰值拉伸或压缩破坏后仍具有一定抗拉、抗压能力。
In order to study the characteristics of tensile and pressure changes of the plastic concrete material for slope protection in the second main canal after physicochemical damage,a multi-factor mechanical failure test of soaking time and solution concentration was designed and carried out.The immersion time and solution concentration are negatively correlated with the tensile strength and compressive strength of concrete,and the immersion concentration has a negative proportional linear function relationship with the compressive strength.When the immersion time is 24 h and 72 h,the difference of tensile strength of the sample with solution concentration of 2 g/L is 20.1%,while the difference of compressive strength is 37.5%.In the test group with immersion time of 24 h,the solution concentration increases by 2 g/L,and the tensile strength The compressive strength decreased by 20.6%and 15.2%respectively.The longer the soaking time is,the more obvious the physicochemical damage effect is,and the sensitivity of compressive strength affected by physicochemical damage is lower than that of tensile strength.The degree of physicochemical damage does not affect the peak tensile or compressive failure,but still has a certain tensile and compressive capacity.
作者
谷静
王霄
陈超
齐春舫
仲召伟
GU Jing;WANG Xiao;CHEN Chao;QI Chunfang;ZHONG Zhaowei(Huai’an Water Conservancy Survey and Design Research Institute Co.,Ltd.,Huai’an 223005,China)
出处
《江苏水利》
2022年第7期21-25,共5页
Jiangsu Water Resources
关键词
二干渠
混凝土
物化损伤
力学
the second main canal
concrete
physicochemical damage
dynamics
