Dear sir,
When we design steel structures using Indian standard IS 800, If Design parameters of SEISMIC as per Section 12 of IS 800 will be checked as follows:
At the same time, Response spectrum analysis had already been performed in model.
But after Run Analysis, some warning and note indicated in Output as follows:
We don't understand why software mentioned Seismic definition unavailable? can you supply some solution to eliminate these warning and note in Output?
Regards
LYN
Please refer response in the below link.
https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/235080/seismic-parameter-setting-for-is1893-part4
Answer Verified By: Li Yanan 李亚楠
Thank you sir. Regarding your reply as follows:
"As per current implementation those values are picked by the program from seismic definition by default. As you are using only response spectrum and there is no seismic definition, program is showing this note to let you know what value it is using. If you add a seismic definition, this note will not be shown."
I just want to know if we only use response spectrum and also consider SEI 1 parameter, whether seismic definition needed or not ? If no seismic definition, this affect the calculation and design results?
Liyanan
Can you give me some suggestions in this regard?
If we only use response spectrum and also consider SEI 1 parameter, whether seismic definition needed or not ? If no seismic definition, this affect the calculation and design results?
Hello,
As per implementation logic, the seismic definition is required. But if you do not provide any seismic definition, the program will consider the default values and will show notes indicating what values the program is using. If you are okay with that, then you do not need to do anything. But if you want to use some other value, please use seismic definition.