Q1 Figure Q1 shows a water tank supported by the restrained isolator system at the four comers. The restrained isolator system consists of three parallel springs. Given the following specifications: Stiffness, k Unloaded length, L. Permissible strain, & 200 N/mm 20 mm = 0.4% (a) Idealize the restrained isolator system into the simplest one-dimensional element and determine the ultimate in-plane force transmitted from the water tank. (6 marks) (b) le Determine whether the springs experience yielding during the loaded stage. (14 marks Describe the possibility to solve the problem in Q1(b) using Partial Differential Equation (8 marks) 3 m 2 2 Concrete slab Front View Section y FIGURE 01 Q1 Figure Q1 shows a water tank supported by the restrained isolator system at the four comers. The restrained isolator system consists of three parallel springs. Given the following specifications: Stiffness, k Unloaded length, L. Permissible strain, & 200 N/mm 20 mm = 0.4% (a) Idealize the restrained isolator system into the simplest one-dimensional element and determine the ultimate in-plane force transmitted from the water tank. (6 marks) (b) le Determine whether the springs experience yielding during the loaded stage. (14 marks Describe the possibility to solve the problem in Q1(b) using Partial Differential Equation (8 marks) 3 m 2 2 Concrete slab Front View Section y FIGURE 01