| 1. | Analying elastic yield of plane rigid frame
平面刚架的弹性屈曲分析 |
| 2. | While these two methods are appropriate only for the elements of constant section
这两种方法只能计算等截面构件的弹性屈曲荷载。 |
| 3. | Effect of torque on the elastic buckling of 3d spatial thin rods with circular cross - sections
扭矩对三维空间圆截面曲杆弹性屈曲的影响 |
| 4. | Inelastic yield load of concrete filled steel tubular middle long columns under axial compression
钢管混凝土轴压中长柱的非弹性屈曲荷载 |
| 5. | The use of intermediate stiffeners in the compression plate may significantly increase elastic buckling stress and ultimate capacity of the plate . however , the behavior of the plate with intermediate stiffeners would be complicated
在受压板件中设置中间加劲肋可以显著提高板件的弹性屈曲应力和极限承载能力，但是也使得板件的屈曲行为变得复杂。 |
| 6. | ( 4 ) introducing how to evaluate load capacity pn of wall stud considering post buckling strength of plate element . local buckling effects are determined according to the effective width method used in specifications gb50018 _ 2002 and aisi96
( 4 )参照gb50018 、 aisi96二本现行规范，采用有效宽度法考虑局部屈曲后强度并对非弹性屈曲应力进行修正，给出了考虑局部屈曲影响和进行非弹性修正后立柱的稳定承载能力p _ n 。 |
| 7. | According to the elastic bucking theory this paper reviews and compares the calculations that such member bend around the reat axis and the hollow axis as well as bend with torsion around the hollow axis . here this paper presents a formula of calculating b used in with the h - shaped anglicizing element . meanwhile , this paper deduces out a formula of calculating b . by , which the member could be controlled to only buckle around the real axis
本文根据弹性屈曲理论对双肢格构式单轴对称缀板柱绕实轴、虚轴以及弯扭屈曲进行了计算分析和比较，提出了绕虚轴侧向屈曲的换算长细比_ ( oy ) = ( y ~ 2 + l ~ 2 ) ~ ( 1 / 2 )中的值用h计算单元指出的计算公式，同时推导出了单轴对称缀板柱只出现绕实轴弯曲屈曲的最小肢间间距b 。 |
| 8. | ( 2 ) the finite element program ansys is used to analyze the elastic buckling of rectangular tube , consequently the buckling load pcr and the simulating formula for the restraint coefficient & , is obtained . the results derived from the program are compared with the british standard and china standard
( 2 )采用有限元程序ansys对矩形钢管板组进行了弹性屈曲分析，得出其临界荷载p _ ( cr ) ，弹性屈曲模态与解析法所作假设相符，并拟合出均匀受压下的矩形钢管约束系数k _ 1的公式，并与英国规范和我国规范进行比较。 |
| 9. | When there is original stage support only , the load ratio of surrounding rock gets more and more bigger with the increasing of crust stress , correspondingly , the load ratio of initial stage support gets smaller . when the initial stage support and the second support act each other , the load ratio of surrounding rock is more than fifty percent , and it has little change with the increasing of crust stress . the whole analysis of the surrounding rock and support shows that the bottom arch of liner and the feet of liner have serious stress concentration , so do the sidewalls and the foot of a wall of the surrounding rock
通过屈曲理论分析结果对比表明，弹性屈曲和突变失稳分析的结果比非线性屈曲分析的结果要大得多，非线性分析由于考虑了材料非线性和几何非线性，因而结果与实际接近实际；当只有初期支护时，随着地应力的增加，围岩的荷载分担率增大，相应地，初期支护的荷载分担率就减小了；当有初期支护和二次衬砌共同作用时，围岩的荷载分担率在50以上，这一分担率随地应力的增加其变化不大；支护和岩体的整体分析表明，衬砌底拱及拱脚处应力集中严重，隧道岩体侧墙及墙角围岩的应力集中也较大。 |
