The ability of a building to withstand the stress of an earthquake depends upon its type of construction, shape, mass distribution, and rigidity. Different combinations are used. To reduce stress, first, the building's ground floor must be flexible. One method is to support the ground floor with extremely rigid, hollow columns, while the rest of the building is supported by flexible columns located inside the hollow columns. A different method is to use rollers or rubber pads to separate the base columns from the ground, allowing the columns to shake parallel during an earthquake. Next, the outdoor walls should be made with stronger and more reinforced materials such as steel or reinforced concrete. Then, to help prevent collapsing, the roof should be made out of light-weight materials.

How is the text structured? _

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The text is structured in a logical, step-by-step format that outlines various strategies for constructing buildings to withstand earthquakes.

  1. Introduction: The text starts by stating the important factors influencing a building's ability to withstand earthquakes, such as construction type, shape, mass distribution, and rigidity.

  2. Ground Floor Flexibility: It then emphasizes the significance of the ground floor being flexible and describes two methods for achieving this:

    • Using extremely rigid, hollow columns to support the ground floor while allowing for flexible columns inside.
    • Employing rollers or rubber pads to allow base columns to move parallel with the ground during seismic events.
  3. Strengthening Outdoor Walls: The text suggests that outdoor walls should be constructed with stronger, reinforced materials like steel or reinforced concrete to enhance durability against seismic forces.

  4. Roof Considerations: Lastly, the text recommends that roofs should be made from lightweight materials to help prevent collapse during an earthquake.

Overall, the text follows a clear progression from foundational considerations to structural enhancements, detailing specific methods for earthquake-resilient construction.