用区间有限元计算边坡荷载组合效应

边坡工程的稳定性受多种因素的影响，其荷载具有不确定性，可以用具有上、下限的区间数来表示，提出了用区间数学和有限元结合构成的区间有限元方法来求解边坡变形。以古树包边坡的变形为例，研究了该方法的可行性，并与常规有限元计算结果进行了比较，实例计算结果表明，该方法用于计算具有不确定性参数和荷载的工程问题的变形是有效的，与常规有限元的要考虑多种工况相比。计算工作量大大减少，使用简便，而计算结果却能满足工程需要，适合计算边坡工程。

Calculation of slope response under combinatorial loads by using interval element method

Slope engineering stability is affected by lots of reasons and the load possesses uncertainties, which can be expressed by the upper and lower boundaries of an interval variable. The interval finite element method, which is combined by interval mathematics and FEM, is proposed to solve the deformation of slope. Taking Gushubao landslide as an engineering case, the practicability of interval finite element method is investigated. The numerical results gained by interval finite element method are compared with that by conventional finite element method, of which the case results show that the method applied to the engineering of the loading uncertainties and mechanical parameters uncertainties is feasible. Compared with conventional finite element method, the interval finite element method is more convenient and simple but the computable results are more suitable to calculate the loading combinations of slope.