Why does a building with full bracing resist better to an earthquake than a building with no bracing?

Several techniques are used to make buildings more resistant to earthquakes. One of them is bracing. A building with full bracing will not lose its shape and collapse. S-waves (shear waves) are responsible for most of the damages during an earthquake, because they shake the buildings from left to right, which weakens their structure. The bracing helps keep the shape of the building, and if the foundations are built on bedrock, the building may resist even the biggest earthquakes. Another technique used to improve the buildings’ resistance to earthquakes is base isolation.