Q11.2: Will there be an address to be delivered by SLC EERI after the model is delivered to the USA by cargo? Will there be a place where the model will be kept until our team comes to America?
A: Yes, dedicated space with a mailing address will be provided. The details will be provided soon.
Q11.1: Will the teams be allowed to work on the building model on day one of the competition? (to repair any damage that may occur to the model during transportation)
A: The teams will be able to work on the first day of the competition until we start the preliminary judging. Roughly the students have until 6 pm of that day to fix any damages that might occur from the transportation process. However, once we start the preliminary judging the students are not allowed to […]
Q6.5: Regarding the following statement: “Digitally high-pass filter the acceleration recordings in the frequency domain using a 3rd order Butterworth filter with a corner frequency of 0.8 Hz.” Why is the Butterworth filter applied to the Fourier transform of the signal and not the signal itself? Shouldn’t a Fourier filter be applied to a Fourier transform instead of a Butterworth filter? Could the thought process for doing this sort of filtering be explained?
A: The Butterworth filter should be applied to the signal itself in the time domain, not the amplitude spectrum in the frequency domain. The wording is incorrect in Section 6.7 and will be amended. It is recommended, however, to look at the response of the signal in the frequency domain to understand why a Butterworth […]
Q6.4: Can temporary 3D printed supports be used to hold washers and plates while the threaded rod is installed?
A: Temporary 3D printed supports may be used as long as they are placed and removed within the dead load installation time limit described in Section 6.4a. After the dead load installation time has expired, dead loads must be secured to the structure only through the methods described in Section 6.4a.
Q6.3: In the text file, the spectral velocity and displacement is given in units of cm/s and cm. Is the g for spectral acceleration in cm/s^2 as well instead of the standard m/s^2?
A: The Sa values are in terms of “g” – acceleration due to gravity. Multiply values by “g” (= 9.81 m/s^2) to obtain Sa in m/s^2.