A practical method of secondary inner force analysis is presented for column-anchor retaining structure considering concrete creep based on concrete aging creep theory and equivalent elastic modulus. 采用老化徐变理论和等效弹性模量法,对肋柱式锚杆支挡结构的徐变影响提出了具体计算方法,并通过实例计算了支挡结构的徐变次内力。
The dislocation substructure during secondary stage of creep has been examined by TEM. 用透射电镜观察了第二阶段蠕变过程位错亚结构的变化。
Secondary Bending Moments due to Elastic and Creep Strain Produced by Prestress Force in Prestressed Concrete Continuous Beam 预应力混凝土连续梁预加力引起弹性的及混凝土徐变的次内力
The test results show that in one-dimensional consolidation tests, coefficient of secondary consolidation, which represents volumetric creep, has a certain law of variation. It has a close relationship with the present consolidation condition and is correlative with compression index. 试验结果表明,在一维固结试验中表征体积蠕变特性的次固结系数有着一定的变化规律,它和当前的固结状态密切相关,并与压缩指数之间有较好的相关性。
The effect of time should be considered in support of the tunnel in the soft rock, and the secondary support structure should be implemented at the time of the creep of the surrounding rock just entering the stable stage. 软弱岩层中巷道支护应考虑时间效应,二次支护应该在围岩蠕变刚进入稳定阶段施作。
Adding certain secondary precipitated phase forming alloying elements in Cu casting alloy, such as Cr, in comparsion with solid solution forming alloying elements for the crystalizer can remarkably improve its creep resistance at high temperature. 在结晶器铸铜合金中添加能析出第二相质点的元素,与添加固溶型元素相比较能明显提高其高温抗蠕变性能。
It may help the readers to understand the computational principle of secondary internal forces due to the creep and shrinkage of concrete. 它将有助于读者对混凝土徐变和收缩次内力计算原理的理解。
The Calculation of the Secondary Moment in the Continuous Girder Bridge due to Concrete Creep According to the Delayed Elastic Deformation Theory 考虑滞后弹性由混凝土徐变引起的连续梁次内力计算方法
For this kind of the bridge, it is important that we should ascertain the distortion and secondary force of the structure caused by creep, in order to make the final structure curve and internal force satisfy with the demand of design and use. 而对于采用悬臂分阶段施工的桥梁,很重要的一点是要确定混凝土徐变引起的结构的变形以及结构合拢后引起的结构次内力,以保证最终的结构曲线型式和内力满足设计和使用要求。
On the basis of the previous paper [ 1], dislocation structures in the primary and secondary stages of high temperature creep of a nickel base alloy ( Ni80Cr20Ti) have been studied by transmission electron microscopy. 本文在文献[1]的基础上,用电子显微镜透射方法研究了一种镍基合金(Ni80Cr20Ti)在高温蠕变第一和第二阶段内的位错结构。
Beam-column effect, large deflection effect, elongation of the cable and the other geometrical nonlinearity and structural secondary internal forces which causes from the prestress, the creep and shrinkage of concrete and the temperature in the mechanical model are inducted. 其中,在建模中考虑的主要因素是:梁柱效应、大变形效应、斜拉索垂度等几何非线性,预应力、混凝土收缩徐变、温度等引起的结构次内力;
Second, after comparing and analyzing to the calculation theories and methods of creep and shrinkage, clearing up the key steps of creep and shrinkage analysis, the paper takes incremental method to establish program to analyze secondary inner force caused by creep and shrinkage. 其次,通过比较分析徐变收缩计算的各种理论及方法,澄清了徐变收缩分析的关键过程,并采用增量法编制程序,实现徐变收缩次内力分析;
A mechanism for secondary stage creep has been proposed according to the climbing model. 按照位错攀移模型,提出一种第二阶段蠕变机理。
An exponent or power function is used to simulate the redistributed stresses of the structures subjected to sustained loads, which can give an effective estimation to the creep stress redistribution for materials exhibiting the secondary creep as well as the primary creep. ( 3). 用指数函数或幂函数模拟高温结构受常机械载荷作用的蠕变应力重分布,对蠕变材料呈初始阶段和第二阶段特性的结构应力重分布可给出有效的估计。
The influence of the time of applying secondary dead load on the post creep deformation has been studied. 研究了二期恒载的施加时机对后期徐变变形的影响。
As the secondary interior force and additional moment change with time, the creep effects also become time-dependent. 由于徐变次内力及附加弯矩会发生时变,其产生的徐变效应同样会发生时变。