混凝土
混凝土
혼응토
CONCRETE
2015年
5期
14-17
,共4页
梁辉%彭刚%胡伟华%黄仕超
樑輝%彭剛%鬍偉華%黃仕超
량휘%팽강%호위화%황사초
饱和混凝土%动态劈拉试验%力学参数%本构模型
飽和混凝土%動態劈拉試驗%力學參數%本構模型
포화혼응토%동태벽랍시험%역학삼수%본구모형
saturated concrete%dynamic split tension test%mechanical properties%constitutive model
利用大型多功能动静力三轴仪进行了不同应变速率(10-5、10-4、10-3和10-2 s -1)下,饱和混凝土劈拉试验,对其峰值应力、峰值应变、弹性模量、吸能能力等物理力学参数变化规律进行了研究,进而分析了饱和混凝土劈拉试验下的各力学参数率效应。从断裂力学角度,分析了饱和混凝土劈拉强度变化机理。基于对具有软化段的 Mazars 本构模型的改造,构建了饱和混凝土劈拉试验应力-应变全曲线方程。经验证,此模型能够较好吻合试验数据。
利用大型多功能動靜力三軸儀進行瞭不同應變速率(10-5、10-4、10-3和10-2 s -1)下,飽和混凝土劈拉試驗,對其峰值應力、峰值應變、彈性模量、吸能能力等物理力學參數變化規律進行瞭研究,進而分析瞭飽和混凝土劈拉試驗下的各力學參數率效應。從斷裂力學角度,分析瞭飽和混凝土劈拉彊度變化機理。基于對具有軟化段的 Mazars 本構模型的改造,構建瞭飽和混凝土劈拉試驗應力-應變全麯線方程。經驗證,此模型能夠較好吻閤試驗數據。
이용대형다공능동정력삼축의진행료불동응변속솔(10-5、10-4、10-3화10-2 s -1)하,포화혼응토벽랍시험,대기봉치응력、봉치응변、탄성모량、흡능능력등물리역학삼수변화규률진행료연구,진이분석료포화혼응토벽랍시험하적각역학삼수솔효응。종단렬역학각도,분석료포화혼응토벽랍강도변화궤리。기우대구유연화단적 Mazars 본구모형적개조,구건료포화혼응토벽랍시험응력-응변전곡선방정。경험증,차모형능구교호문합시험수거。
The split tension tests of saturated concrete were carried out by 10 MN Large Static and Dynamic Triaxial Apparatus Func-tion under different strain rates(10 - 5、10 - 4、10 - 3 和 10 - 2 s - 1 ). The mechanical properties,such as the peak stress,peak strain,elastic modulus and energy absorption were researched.And then,the rate effect on the mechanical properties of saturated concrete were ana-lyzed.From perspective of fracture mechanics,splitting tensile strength mechanism of saturated concrete was analyzed. Based on the transformation of Mazars constitutive model with softened section,the equation of stress - strain curve is established.It was verified that the model fits the data of the test well.