Testing concrete - recommendations for the measurement of dynamic modulus of elasticity 混凝土試驗(yàn).第209部分:動(dòng)態(tài)彈性模量測(cè)定的推薦方法
Natural stone test methods - determination of the dynamic modulus of elasticity by measuring the fundamental resonance frequency 天然石料試驗(yàn)方法.彈性的動(dòng)態(tài)模量的測(cè)定
Testing of carbonaceous materials - determination of dynamic modulus of elasticity by pulse excitation - solid materials 炭素材料試驗(yàn).采用脈沖激勵(lì)法測(cè)定動(dòng)態(tài)彈性模量.固體
Methods of test for dynamic modulus of elasticity , rigidity and poisson ' s ratio of concrete by resonance vibration 用共振法測(cè)定混凝土的動(dòng)態(tài)彈性模量剛性模量及泊松比的試驗(yàn)方法
Natural stone test methods - determination of the dynamic modulus of elasticity by measuring the fundamental resonance frequency ; german version en 14146 : 2004 天然石料試驗(yàn)方法.彈性的動(dòng)態(tài)模量測(cè)定
With changing the value of every parameter of the model , we can analyse the impact on the dynamic modulus of elasticity " of every parameter 然后,改變模型各參數(shù)的值,分析各參數(shù)對(duì)動(dòng)態(tài)彈性模量的影響。
Comparing the dynamic modulus of elasticity of the model in each age with the corresponding values of the test data , we can verified the feasibility of the method 將求得的各齡期的動(dòng)態(tài)彈性模量與相應(yīng)的試驗(yàn)數(shù)據(jù)相比較,驗(yàn)證方法的可行性。
This means the saturation degree of concrete is different . by means of analyzing the l9 ( 34 ) orthogonal table , the air content is the chief factor , the second factor is water binder ratio and the third is mineral admixture in both high water pressure and low water pressure . the water saturation degree of concrete in damaging point ( e6 / e0 = 60 % ) can be found by measuring the dynamic modulus of elasticity after six freezing - thawing cycles 采用l9 ( 34 )正交表對(duì)水膠比、含氣量和摻合料三個(gè)因素進(jìn)行分析,試驗(yàn)結(jié)果表明:在自然情況下,影響混凝土水飽和系數(shù)的主要因素是水膠比,而影響混凝土在鹽溶液中飽和系數(shù)的主要因素則是含氣量;在水壓力作用下,無(wú)論壓力大小,混凝土水飽和系數(shù)的影響次序依次為含氣量、水膠比、摻合料。
The test result shows that the water binder ratio is the chief factor in damaging point . the saturation of concrete and the higher degree of saturation in the surface layer of specimens can be used to explain the damage form of specimens in the freezing - thawing , which include change of relative dynamic modulus of elasticity and weight 通過(guò)測(cè)定飽水受凍6次后混凝土試件的相對(duì)動(dòng)彈性模量,可以計(jì)算出混凝土破壞時(shí)( e6 / e0 = 60 % )相對(duì)應(yīng)的水飽和系數(shù),即極限水飽和系數(shù),試驗(yàn)結(jié)果表明對(duì)試件極限水飽和系數(shù)而言,水膠比影響顯著。
The job of this paper was divided into two parts mainly . firstly , the numerical simulation approach for polygonal aggregate was presented . secondly , the space analysis model for dynamic modulus of elasticity of concrete was set up , and a series of theories analysis and calculations to the model were performed 本文的工作主要分為兩部分,首先提出了混凝土多邊形骨料的數(shù)值模擬方法,然后為了研究混凝土的動(dòng)態(tài)彈性模量建立了空間分析模型,并對(duì)模型進(jìn)行了一系列理論分析和計(jì)算。