Structural Engineering & Statics
where the load goes
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The load that will not hold still — page 2

Essays 25 to 26 of 26 on this thread, in the same order.
windward c_p = 0.8leeward c_p = -0.5sidec_p = -0.7sidec_p = -0.7842 kN38% of it fromthe back face30 × 20 m Equilibrium

Most of it is suction

A wind load is drawn as arrows pressing on the windward face, which is where about three fifths of it comes from. The rest is a pull on the back. The two side faces carry the largest suctions on the building and contribute nothing at all to the answer — and the inside of the building, which nobody draws, decides whether the roof stays on.

 10020030040050060070000.20.40.60.811.21.41.6shear wave velocity of the ground (m/s)÷ the fixed-base answerperiodbase sheardampingfixed base200 m/speriod 1.311 times · shear 0.88 times · drift 1.51 timessoft groundrock Dynamics

The ground is a spring

Every dynamic result in this collection has assumed a structure rising from something that does not move. Nothing does. A foundation can slide and it can rock, both are flexibilities in series with the structure's own, and the rocking one carries a square of the height — so the period lengthens, the force falls, the drift rises, and the damping goes the wrong way.

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