seismic lateral
seismic lateral
(OP)
I am about to begin modeling a simple structural steel building. I am using the 2003 IBC to determine the seismic forces. I have determined the Design Base Shear now I am trying to figure out what is going on with 1617.1.1.1
It appears that the code is coming up with another load to apply in combinations. My question is do I apply the base shear to my model...or do I multiply base shear by rho and add to it the (.2)Sds(D) and apply that to the respective storys in my building.
Don't be affraid to over simplify...I'm confused!!
It appears that the code is coming up with another load to apply in combinations. My question is do I apply the base shear to my model...or do I multiply base shear by rho and add to it the (.2)Sds(D) and apply that to the respective storys in my building.
Don't be affraid to over simplify...I'm confused!!






RE: seismic lateral
Start with these threads and see if they help.
thread176-98527
thread487-121459
Regards,
-Mike
RE: seismic lateral
These are very difficult to sort out. To me the combinations need to be run member by member. Not the old level by level or wall by wall method.
It sounds like you have done your work correctly. Your earthquake shear is now the Qe term and you need to increase or decrease it by eqns 16-50,51. I hope others will chime in here to correct me if I am wrong.
RE: seismic lateral
RE: seismic lateral