Answer from question 64 states that:
Bldg fundamental period of vibration is directly proportional to mass... so based on their answer if you increase the mass of a bldg you are increasing the bldg period of vibration.
I wonder how... cause I thought that if you increase bldg mass (meaning you make it heavier) then the bldg period of vibration decreases (contrary to what they say...)
If someone could clarify I would really appreciate it...
Thanks a lot guys!