A beam or a column often supports other members which participate in the buckling action , and significantly influence its in - plane stability and out - of - plane stability . if these elastic restraints action of buckling resistance is taken into account the critical loads of steel members may apparentely been increased and plenty of steel material is saved 梁或柱为其连接的其他构件提供支撑，同时，与梁或柱相连接的构件也为梁或柱提供约束作用。这些约束作用极大地影响着梁或柱的平面内稳定和平面外稳定。利用连接构件之间约束作用，钢构件的稳定临界荷载可以得到显著的提高，节约大量的钢材。
In accordance with the occurrence behavior of roof strata and the fracture characteristics of key stratum in shallow seam longwall mining , studied post - buckling behavior of roof key stratum in the process of mining by using initial post - buckling theory , which derived a critical load and a breaking span of the main roof during the first weighting , determined the final subsidence and the maximum rotation angle for broken key stratum , and presented an application with the example of daliuta 1203 face 摘要根据浅埋煤层顶板岩层的赋存特点和长壁开采时关键层的变形破断特征，应用初始后屈曲理论探讨了开采过程中顶板关键层的后屈曲性态，得出了老顶初次来压时顶板的临界载荷和破断步距，确定了顶板破断后的极限下沉量和回转角，并以神东矿区大柳塔1203工作面为例给出了工程实例。
The dynamical parameter was regarded as evaluation guideline , and through investigating the change characteristic of the basin and modulus under different destroy boards , different area and different level loads , the identify methods of the pavement bursted have been given and we advise to use synthesize modulus ratio to evaluate the pass - loads capacity of the joints . we have also discussed the influence of different level loads to the joints pass - loads capability , and confirmed the commonness and oneness of the influence of the pass - loads and bursted to the basin and modulus under the critical loads , and the range of the critical loads was also given . basing on the determination of the pass - loads a 以动态参数作为评价指标，通过研讨不同破坏板的不同区域，在不同等级荷载作用下弯沉、模量的变化特性，提出了路面脱空识别办法以及利用综合模量比来评价接缝传荷能力的思想，探讨了不同等级荷载对接缝传荷能力的影响特性，确定了临界荷载下传荷与脱空对弯沉、模量影响的共性和单一性，并确定了临界荷载的范围，在判定脱空和传荷基础上提出了水泥混凝土路面的压浆效果的评价方法，通过研讨荷载与动态模量的关系，对地基的动态性能进行了系统的分析与评价。
In this part , it is also found that the equivalent prismatic column , which is obtained based on the equal elastic critical load as the non - prismatic member , is not actually equivalent to the tapered column in inelastic stability , and the latter has higher load carrying capacity . finally , the behavior of tapered beam - column acted by combined axial load and transverse load has been investigated . a bending - thrust interaction curve is established which is similar to the ones for the design of prismatic members 三是研究了楔形变截面悬臂构件在大端固定，小端同时承受横向及轴向荷载共同作用下的强度和弯矩平面内的稳定，同时参考等截面构件的设计公式，得到了用大端截面来表示的轴力p与弯矩m的之间的相关关系。
First , the dynamic stability of braid composite cylindrical shells with the influences of some main factors is introduced . the general governing equations for the nonlinear dynamic stability is obtained . by the hamilton principle . the creep buckling analysis of braid composite cylindrical shells under axial compression and the dynamic stability under nonconservation force are discussed as emphases . in creep buckling question , by means of theoretical analysis , the instaneous critical load and durable critical load of viscoelastic braid composite cylindrical shell under axial compression are obtained and the numerical example is given 首先介绍了编织复合材料圆柱壳在几种主要因素影响下的动力稳定性问题，用hamilton原理建立非线性动力稳定性问题的一般性基本方程。然后重点讨论了编织复合材料圆柱壳轴压下的蠕变屈曲问题及非保守力作用下的屈曲问题。对蠕变屈曲问题，通过理论分析来得到了编织复合材料圆柱壳的瞬时弹性临界载荷和持久临界载荷，给出了具体的算例。
