|
CD-FQ-01.
How do I use Space frame Analysis results for
designing Columns?
Answer:
The main feature of this software is
that after the SPACE FRAME ANALYSIS is done user
can design the columns for entire structure from
top to bottom. The Column Design option is executed
for Plinth Level only. After selecting Plinth
Level when we give column design command program
reads the forces of the appropriate members at
that level and writes in a temporary file with
the extension .COL. When we run the automatic
design procedure .COL file is read and database
file .RCDB is created. Further in the interactive
design procedure these data files are referred
and not original .COL file. Thus any parameter
stored for a particular component say C1, C8 concrete
grade, cover to reinforcement etc. is stored individually
for every column in the entire project.
CD-FQ-02.
How do I neglect Moments due to Slenderness and
Minimum Eccentricity while designing Columns for
Space frame Analysis results?
Answer: In order to neglect the
Moments due to Slenderness and Minimum Eccentricity
during Automatic Column Design the Value of Effective
Length Factor is to be given as 0.1 and the Minimum
Eccentricity value is to be given as Zero.
CD-FQ-03.
Why the reforcement steel in the column at upper
levels is more than the steel in lower levels
when Earthquake, Wind loads are considered in
the Frame Analysis ?
Answer: The columns are designed for
horizontal forces and moments due to Earthquake/Wind.
The earthquake load distribution is parabolic
with more load on upper levels then the lower
ones. Therefore upper level columns & beams
will have more moments & shear forces, than
those at lower levels. Hence, even though the
vertical loads are less at upper levels the reinforcement
steel at those levels is more when Earthquake/Wind
forces are considered in the Analysis. |
