As mentioned over, concrete is extremely strong in compression, but weak in rigidity. Larger earthquakes can produce pretty significant shear masses on buildings. These shear loads subject the composition to each tensile and compressional loads. Concrete constructions without reinforcement, like other unreinforced masonry constructions, can fail through serious earthquake shaking. https://julius89zu9.activosblog.com/34647015/an-unbiased-view-of-concrete-reinforced-retaining-wall