since the ramp in my case are inclined to specified degree , i want to ask that is it possible to design the building for EQ forces ? i am designing as per is 1893-2002 and i have tried by member weight option it mean that i have transferred the slab forces on the adjacent beams . But analysing it is showing some error. what should i do ?
Sorry, the file was posted by Sri Chavda on Jan 10, not on Jan 11 as stated in my posting. The error may be noticed after opening the Staad Editor file.
The last file sent by Sri Chavda sent on Jan 11 2011 shows error as under:
Line 481,482,497,498: Definition of Seismic load: selfweight is not to be factored with 1. Element weight has to come before floor weight. Hence the error.
Line 908,947,976,1005,1034,1052,1082,1199: The design parameter METHOD 0 has been repeatedly assigned to many members several times. The parameter is not supported by IS 456. Hence the error.
The error can be fixed by correcting the above inputs.
Himmatlal Chavda,
To the best of my knowledge, the MEMBER WEIGHT feature works quite well. When you provide the seismic weights under "DEFINE 1893 LOAD", you should use the syntax MEMBER WEIGHT, not MEMBER LOAD. If you typed the data using the editor, a mistake could have crept in unbeknownst to you. If you assign it using the graphical tools, the program generally does it without any errors.
In any case, attached is a model which shows the usage of that command.
If you are convinced that there is an error in the program, you ought to upload the model that reveals the error, or send it to the STAAD support people at Bentley.
Mr. sklose i have tried the said option of member load but it showed the error in generating the EQ forces. then i tried the plate load with plate load specification then the staad was able to generate the EQ forces.
this is the final model. verify it and say whether it is right or not.