匿名
匿名 發問於 科學及數學物理學 · 4 年前

Can you answer the following questions?

A brick pier is 5 m square and 6 m high and weighs 20 kN/m^3 standing on a 6 m thick layer of soil. It is supporting an axial load of 500 kN. Calculate the stress at the top of the pier and the stress at the surface of the underneath soil. Also find the settlement of the soil if the Young’s Modulus of the soil is 150 kN/m^2.

1 個解答

評分
  • 天同
    Lv 7
    4 年前
    最愛解答

    Stress at top of pier = 500/5^2 kPa = 20 kPa

    Total weight of pier = 20 x (5 x 5 x 6) kN = 3 000 kN

    Hence, total load on surface of soil = (500 + 3000) kN = 3500 kN

    Stress at surface of soil = 3500/5^ kN/m^2 = 140 kPa

    Strain on the soil = 140/150 = 0.9333

    Hence, settlement of soil = 0.9333 x 6 m = 5.6 m

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