With the theoretical analysis of beams strengthened by gluing steel plates , this thesis propose the formulas to calculate the capability of bearing bending under different forms of loading , and the worth of the common function coefficient of steel plates is suggested . at the same time , the concept of premature failure and the standard of failure are brought up . finally , the referencing formulas to calculate the rigidity and deflection of beams strengthen by gluing steel plates are proposed , and the calculating results cohere to the experimental results well 通过对粘钢加固梁的理论分析，文中给出不同形式粘钢加固的抗弯承载力计算公式，并对钢板共同作用系数提出了建议值；同时，文中提出了早期破坏的概念，并给出早期破坏的强度破坏准则；最后，对粘钢加固的刚度和挠度计算提出了参考公式，且与试验结果吻合较好。
Based on elastic methods , the single pile behavior is studied through mindlin stress solution , followed by the analysis of interaction between two piles . thus , the interaction factor is obtained , based on which the interaction between more piles in pile group can be considered using superposition principle 本文以弹性理论法为基础，首先运用mindlin应力解对单桩进行分析，然后分析了两根桩时，桩与桩之间的相互影响，最后根据弹性理论叠加原理，通过引入一个“共同作用系数” ，扩展到群桩中去。
