Research Article

Time-Dependent Fuzzy Reliability Analysis of Concrete Slab during the Initial Water Storage Period of CFRD: A Case Study

Figure 4

Diagram of the Drucker–Prager yield criterion: (a) the loads acting on the concrete slab, (b) the microelement subjected to three-directional principal stresses, (c) the Drucker–Prager yield surface in 3D space of principal stresses, and (d) the Drucker–Prager yield surface in π plane.