CAJ | 학술논문

采用大型三轴仪对紫坪铺面板坝堆石料进行了单调和循环荷载下的固结排水剪切试验，研究了不同孔隙比情况下颗粒破碎及剪胀的变化规律。试验表明：（1）单调和循环荷载条件下，堆石料颗粒破碎率与塑性功之间存在一致的双曲线关系；（2）峰值应力处剪胀率与颗粒破碎率在半对数坐标中呈近似线性关系；（3）峰值应力处主应力比与相应的剪胀率呈近似线性关系，且上述结果受初始孔隙比的影响不大。研究成果有助于进一步了解堆石料的颗粒破碎特点，对建立复杂应力条件下考虑颗粒破碎和状态相关性的弹塑性本构模型，分析紫坪铺面板堆石坝汶川地震破损机制是十分有益的。
채용대형삼축의대자평포면판패퇴석료진행료단조화순배하재하적고결배수전절시험，연구료불동공극비정황하과립파쇄급전창적변화규률。시험표명：（1）단조화순배하재조건하，퇴석료과립파쇄솔여소성공지간존재일치적쌍곡선관계；（2）봉치응력처전창솔여과립파쇄솔재반대수좌표중정근사선성관계；（3）봉치응력처주응력비여상응적전창솔정근사선성관계，차상술결과수초시공극비적영향불대。연구성과유조우진일보료해퇴석료적과립파쇄특점，대건립복잡응력조건하고필과립파쇄화상태상관성적탄소성본구모형，분석자평포면판퇴석패문천지진파손궤제시십분유익적。
A series of large-scale consolidated drained triaxial tests were conducted to research particle breakage of Zipingpu rockfill material under monotonic and cyclic loading for different initial void ratios. The results show that there exists a hyperbolic relation between the input plastic work and particle breakage, regardless of the initial void ratio or confining pressure under both monotonic and cyclic loading. The dilatancy factor at peak decreases with the increasing of particle breakage and there exists a nearly linear relation between particle breakage at peak and the dilatancy factor at peak on semilog coordinate, irrespective of initial void ratio. Test results in this study also indicate that there exists an approximate linear relation between peak principal stress ratio and the dilatancy factor at peak, regardless of the initial void ratio. This study results can provide useful references for state-dependent elastic-plastic constitutive model considering particle breakage and finite element analysis of Zipingpu concrete face dam during Wenchuan earthquake;and help to further understand the particle breakage of rockfill materials.