饱和大骨料混凝土动态双轴受压力学性能试验研究  

Experimental study of dynamic behavior of saturated dam concrete under biaxial compression

作　　者：王浩[1,2] 王立成[1] 宋玉普[1] 

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]辽宁建筑职业学院建筑经济系,辽宁辽阳111000

出　　处：《大连理工大学学报》2016年第1期13-19,共7页Journal of Dalian University of Technology

基　　金：中国水利水电科学研究院流域水循环模拟与调控国家重点实验室开放研究基金资助项目(IWHR-SKL-201309);中央高校基本科研业务费专项资金资助项目(DUT14LK23)

摘　　要：分别通过试验研究了饱和与干燥大骨料混凝土试件在动态双轴受压状态下的强度特征.试验采用大型混凝土静、动态三轴液压伺服试验系统,设定了4个数量级的应变率(10-5、10-4、10-3、10-2 s-1)和5种应力比(0∶1、0.25∶1、0.50∶1、0.75∶1、1∶1).根据试验结果,分析了孔隙水对大骨料混凝土动态双轴极限抗压强度的影响,并提出了饱和大骨料混凝土动态受压破坏准则.研究表明,饱和大骨料试件在动态条件下的强度与干燥混凝土试件相比提高明显,而在准静态条件下有所降低.在相同应变率下,与单轴相比,双轴极限抗压强度在应力比为0.50∶1时最大.The dynamic behaviors of saturated and dry dam concrete specimens are experimentally studied when subjected to biaxial compression stress.The tests are carried out on the large static and dynamic triaxial hydraulic servo test system.Four strain rates（10-5,10-4,10-3,10-2 s-1）and five kinds of stress ratio（0∶1,0.25∶1,0.50∶1,0.75∶1,1∶1）are taken into the tests.Based on the test results,the influence of pore water on the biaxial dynamic ultimate compressive strength of dam concrete is investigated.A dynamic compression failure criterion of saturated dam concrete is proposed.The test results show that compressive strength of saturated dam concrete is larger than the dry one in dynamic conditions,while is lower at quasi-static conditions.Compared with the uniaxial compression of all the strain rates,biaxial ultimate compressive strength reaches the maximal value at the stress ratio of 0.50∶1.

关 键 词：大骨料混凝土 饱和 双轴受压 动态受压破坏准则 

分 类 号：TV431[水利工程—水工结构工程]