大骨料混凝土在动态双轴压应力下的试验研究  

Experimental study of large aggregate concrete under dynamic biaxial compressive stress states

作　　者：宋玉普[1] 尹翠[1] 沈璐[2] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]大连海洋大学海洋与土木工程学院,辽宁大连116023

出　　处：《混凝土》2013年第10期1-3,9,共4页Concrete

基　　金：国家自然科学基金资助项目(51079019;90815026)

摘　　要：利用大连理工大学自行研制、改造的大型液压伺服静动三轴试验系统对70个大骨料混凝土立方体试件进行不同应变率和不同应力比下的双轴压试验,系统研究了当应变率分别为10-5、10-4、10-3、10-2/s时,大骨料混凝土在应力比1∶0,1∶0.25,1∶0.5,1∶0.75,1∶1状态下的强度变化、变形特性、应力-应变曲线和破坏准则。试验表明:大骨料混凝土在双轴压应力状态下,随着应变率的提高,任一应力比下的混凝土的极限强度有所提高,并建立了考虑相似角影响的八面体应力空间破坏准则。Dynamic compressive tests in triaxial stress states on different stress ratio and different stress ratio of 70 cubic concrete specimens were carried out on a servo-hydraulic multiaxial testing machine designed and manufactured at Dalian University of Technology. Studying systematically ultimate strength, deformation characteristic, stress-strain curve and failure criteria of large aggregate concrete under the stress ratio of 1：0,1：0.25,1：0.5,1：0.75,1：1 ,when the strain rate was 10-5,10-4.10-3,10-2/s.Test results showed that the ultimate strength of large aggregate concrete under any stress ratio increases as the strain rate increases.And the octagonal space stain failure criteria was established that affect the influence of similar horns.

关 键 词：大骨料混凝土 应变速率 八面体应力空间 极限强度 应力-应变曲线 

分 类 号：TU528.01[建筑科学—建筑技术科学]