Modal mass Percentage & different elevation
Posted: 05 Nov 2020, 19:08
hey Everyone;
I built a model with seismobuild, the building is two story build with underground story at part of entire area!
I am facing two problems:
1- how to overcome the different elevation of the foundations, since part of the building has an underground story and the rest are starts at ground level?
I tried building columns, but i guess it's not the best solution! In addition i don't want to add massive elements resulting a larger mass for earthquake forces, any suggestion?
2- Eigenvalue Analysis the building didn't reach over 50% of the mass, it has 22 modes!
any Idea what is the problem? or what should i check to make sure i am not doing something wrong,
I applied the loads on the slabs
I checked the reinforcement
I could send the model, if anyone has time to take a look
I appreciate any help or idea.
Thanks
Yasmin
I built a model with seismobuild, the building is two story build with underground story at part of entire area!
I am facing two problems:
1- how to overcome the different elevation of the foundations, since part of the building has an underground story and the rest are starts at ground level?
I tried building columns, but i guess it's not the best solution! In addition i don't want to add massive elements resulting a larger mass for earthquake forces, any suggestion?
2- Eigenvalue Analysis the building didn't reach over 50% of the mass, it has 22 modes!
any Idea what is the problem? or what should i check to make sure i am not doing something wrong,
I applied the loads on the slabs
I checked the reinforcement
I could send the model, if anyone has time to take a look
I appreciate any help or idea.
Thanks
Yasmin