Seismic Bearing Capacity Solution for Strip Footings in Unsaturated Soils with Modified Pseudo-Dynamic Approach

In engineering mathematics, the unsaturated nature of soil has a significant impact on seismic bearing capacity solution. However, it generally been neglected in published literature to date. Based kinematic approach limit analysis, present study proposes method for calculating shallow strip footings located soils, taking four common types soils as examples. The modified pseudo-dynamic (MPD) is used calculate forces varying with time and space, layerwise summation derive power generated by forces. calculation internal energy dissipation, this paper introduces effective stress based suction cohesion expression at different depths. analytical formula obtained principle virtual work, its value optimized Sequential Quadratic Programming (SQP) algorithm. order verify validity proposed method, results are compared solutions so far good agreement obtained. Finally, parametric performed investigate influence parameters capacity.