Furthermore , the formula of bending stiffness of multi - walled carbon nantubes ( mwcn ) has been derived via a quasi - continuum mechanical method 基于单壁碳纳米管的分析结果,提出了一种新的计算多壁碳纳米管抗弯刚度的方法,并推导了多壁碳纳米管的抗弯刚度公式。
The test results confirm that ferrocement can be used to significantly increase the flexural capacity , raise crack - resisting capacity and improve the bending stiffness of rc beam 试验结果表明,钢丝网复合砂浆薄层可以明显地提高钢筋混凝土梁的抗弯承载力,提高抗裂性能,增强构件的抗弯刚度。
This formula can be reduced to the classic bending stiffness formula with the special conditions , and explain why the bending stiffness of swnt can not be obtained by classic formula 该公式能在极限条件下很好的还原为经典弹性力学中的抗弯刚度公式,并清楚地反映单壁碳纳米管抗弯刚度不能由经典弹性力学抗弯刚度公式计算的本质原因。
The research results demonstrate that the determining method can eliminate errors brought by pivot conditions and selfweight and bending stiffness of the cable and can realize high precision and shortcut testing for the cable on cable - stayed bridge 研究结果表明:该测试方法能有效地消除支座条件、拉索自重及索抗弯刚度等因素对测力信号的影响,可实现斜拉桥张拉索受力的精确、快捷测量。
The formula of bending stiffness of single - walled carbon nantubes ( swcn ) has been derived via molecular mechanics based on analysing the special structure of swnt , and the value calculated from this formula is in excellent agreement with effective bending stiffness 摘要通过对单壁碳纳米管的独特结构的仔细分析,运用分子力学方法,得到了单壁碳纳米管抗弯刚度的计算公式,其结果与目前公认的单壁碳纳米管的有效抗弯刚度吻合得很好。
Compounding stiffness is introduced for analyzing the characteristics of moment redistribution in the long - span floor beams structure subjected to lateral loading . it is shown from the testing result that the specimen can be analyzed by elastic theory before cracking . the development of cracking in the spandrel beams and the floor beams ( including floor ) causing the compounding stiffness and the bending stiffness of floor beams through the column to change distinctly , correspondingly moment - torque redistribution occurs 由于过柱子次梁、边主梁的开裂以及梁上次梁(包括楼板)的开裂,使得过柱子次梁的抗弯刚度和边主梁梁上次梁板组合刚度发生了明显的变化,导致产生弯扭重分配,一般情况下,组合刚度与过柱子次梁抗弯刚度的比值增大,边主梁所受扭矩增加,反之,边主梁所受扭矩减小。
Based on the calculated results of the computer program , varied stress contribution curves of short leg walls with t , l and + shaped sections are shown in the paper , together with deformation information of members . to measure the influence of shear lag , the equivalent bend stiffness of short leg walls is introduced . the discounting coefficients of the bend stiffness of members can be used in the bars - system models of short leg walls building structures 借助一个力学模型,论文将影响构件侧移的弯曲变形、剪切变形、剪滞效应三个因素分离开,分析了剪滞效应对构件抗侧性能的影响,并将该影响计入了短肢剪力墙理论抗弯刚度的折减系数,经折减的短肢剪力墙等效抗弯刚度内在包含剪滞效应的影响,可方便地用于结构的计算实际。
Taking the bending stiffness , cable sag and cable inclination into consideration , the space vibration control of the cables using the visco - elastic dampers in cable - stayed bridges is investigated by joining the center difference method and the state space strategy . both the maximum modal damping ration and the optimal damper size are obtained , then the practical suggestions are proposed for the design of the dampers . the space nonlinear vibration equations of the cable - damper system are derived , and a new hybrid method for solving the cable - damper system is presented by combing the newmark method and pseudo - force technology 综合考虑了拉索抗弯刚度、垂度的影响,研究了粘弹性阻尼器对斜拉桥拉索的空间振动控制,联合中心差分方法及状态空间法,得出了拉索面内、外振动各阶模态可能达到的最大阻尼比及相应的最优阻尼器系数,并对斜拉桥拉索的阻尼器设计提出了参考建议:考虑拉索抗弯刚度、垂度及几何非线性,导出了索-阻尼器系统的空间振动非线性方程组,结合newmark方法及伪力( pseudo - force )方法,创新地提出了求解非线性方程组的杂交方法,根据拉索-阻尼器系统的阻尼特性,在各种荷载作用下,对索-阻尼器系统的非线性瞬态振动响应进行了研究,从系统响应的角度更加直接地验证了阻尼器的控制效果。
But this time , the authors considered more factors that can influence the precise , which include plastic resistant moment of special - shaped columns , bending stiffness of beams and cracking of walls . then , the equivalent width of diagonal strut is worked out . based on above results , the bar system model is used to calculating the internal force of the structure and the results were match the testing data basically 给出结构的简化计算方法,本文利用砌块墙体的斜压杆等效原理,并考虑了异形柱的塑性抵抗矩、 0梁的抗弯能力以及马牙搓连接等多种因素,解出了斜压杆的等效宽度,在此基础上按杆系模型对结构进行了简化静力验算,结果与试验基本相符。
The cable sag and bending stiffness effects are studied on the higher natural frequencies of cable vibration . it is found that the differences of the higher adjacent frequencies go to the fundamental frequency of the taut string theory even though the cable sag or bending stiffness is included . this unique characteristic of cable vibration is used to determine the cable tension with the well - known taut string theory 2 .考虑垂度和抗弯刚度对高阶自振频率的影响,探讨了索相邻频率之差,发现索的高阶频差就是弦振动理论的基频,利用这一特性,分析了频差法测索力的精度和适用范围。
The bending stiffness is equal to the product of the elastic modulus E and the area moment of inertia I of the beam cross-section about the axis of interest. In other words, the bending stiffness is E I.