STRENGTH AND ENERGY ABSORPTION CAPABILITIES OF PLAIN CONCRETE UNDER DYNAMIC AND STATIC LOADINGS
STRENGTH AND ENERGY ABSORPTION CAPABILITIES OF PLAIN CONCRETE UNDER DYNAMIC AND STATIC LOADINGS
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DOI：
10.14359/7604
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发表时间：
1967-11
期刊：
影响因子：
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通讯作者：
Bill L. Atchley;H. Furr
中科院分区：
文献类型：
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作者：
Bill L. Atchley;H. Furr
用606×12In研究了素混凝土在静力和动载作用下的吸能性能和强度承载能力。气缸。三个名义强度分别为2500、3700和5000PSI的混凝土在每秒7.1到17X10指数6PSI的应力率下进行了测试。在常规液压试验机上进行中低速加载试验。在每一次试验中，试件都被支撑在一个有浮头的加载框架中，以确保适当的载荷分配。压缩强度和吸附能随着加载速率的增加而增加，并在较高加载速率下变为恒定值。割线弹性模数和应变也随着加载速度的增加而增大。无论是静态应变还是动态应变，内部应变都大于外部表面应变，也有证据表明混凝土试件在动态荷载作用下表现为粘弹性。/作者/
THE ENERGY ABSORPTION AND STRENGTH CARRYING CAPACITY OF PLAIN CONCRETE SUBJECTED TO BOTH STATIC AND DYNAMIC LOADING WERE INVESTIGATED USING SIXTY 6 X 12 IN. CYLINDERS. THREE CONCRETES WITH NOMINAL STRENGTHS OF 2500, 3700, AND 5000 PSI WERE TESTED WITH RATES OF STRESS RANGING FROM 7.1 TO 17 X 10 EXPONENT 6 PSI PER SEC. THE LOWER AND INTERMEDIATE RATES OF LOADING WERE OBTAINED THROUGH THE USE OF THE CONVENTIONAL HYDRAULIC TESTING MACHINE. IN EACH TEST THE SPECIMEN WAS SUPPORTED IN A LOAD FRAME WHICH HAD A FLOATING HEAD TO INSURE PROPER LOAD DISTRIBUTION. THE COMPRESSIVE STRENGTH AND ENERGY ADSORBED INCREASED WITH THE INCREASE IN THE RATE OF LOADING, WITH EVIDENCE OF BECOMING A CONSTANT VALUE AT THE HIGHER RATES OF LOADING. THERE WERE ALSO INCREASES IN THE SECANT MODULUS OF ELASTICITY AND THE STRAIN AS THE RATE OF LOADING INCREASED. THE INTERNAL STRAIN, BOTH STATIC AND DYNAMIC, WAS LARGER THAN THE EXTERNAL SURFACE STRAIN AND ALSO THERE WAS EVIDENCE THAT THE CONCRETE SPECIMEN BEHAVED VISCO-ELASTICALLY UNDER DYNAMIC LOADING. /AUTHOR/