采用塑性铰线理论，对三种可能的塑性铰线形式分别进行分析，得到极限承载力的解析式。
Using plastic yield line theory, three yield line patterns are analysed and the formulas of the ultimate bearing capacity are obtained.
在许多塑性变形情况下，速度场比较容易用解析法获得。
In many plastic deformation cases the velocity field is rather easily solved by analytical method.
应用参变量变分原理推导了复合模量在弹性及塑性状态下的解析解。
The analytical solutions of composite modulus in both elastic and plastic conditions are deduced by applying parametric variational principle.
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