Dear everyone,
I have a query regarding the bending moments in slabs after adding secondary beams.
As per the conventional approach, the bending moments in the slab near the secondary beam should be the hogging moment. But in ETABS, I am getting sagging moments near secondary beams which seem to...
Dear everyone,
I am getting huge torsional moments in beams due to earthquake forces in ETABS.
The slab diaphragm is rigid.
Can anyone describe how torsion is induced in beams due to the earthquake force? How is it calculated manually?
Dear everyone,
I am modelling a ten storied building with beams, columns and shear walls in ETABS. The building has core shear wall system. The beam connecting the core shear wall and column is failing in shear. The length of this beam is 2 meter. Increasing the size of beam causes the increase...
Dear everyone,
I want to design a retaining wall supported on single pile.
Can anyone give me tips on how to design the wall and pile?
Is there any book for the reference?
Dear everyone,
I am modelling a building for banking purposes. It has vault at the ground floor and parking at basement.
The vault has shear wall which cannot be continued to the raft foundation as it disturbs parking area in the basement.
I cannot see the effect of this discontinuity in ETABS...
Dear everyone,
Can anyone clarify me the meanings of Mass X, Mass Y, XCCM, YCCM in the center of mass and rigidity table generated by ETABS?
Is there any manual where their meanings are written?https://files.engineering.com/getfile.aspx?folder=d8a91f83-dfdd-43a0-864e-b10d35383031&file=Capture.JPG
Hi everyone,
I am analyzing a 3 storied residential building with story height of 11 ft in ETABS. The number of bays in X direction is 3 with maximum span of 12 ft and the number of bays in Y direction is 2 with maximum span of 14 ft.
I am getting huge story drift ratio (of around 0.008) which...
Dear everyone,
I have doubt regarding the design of column with shear wall. While modelling the building with shear wall, the columns attached to shear wall fails due to higher axial force and moment in the column. Increasing the size of column increases the force and thus fails again.
What are...
Dear everyone,
I am modelling a five storied building with one basement. The basement walls are modelled at basement. The building also has vault rooms in the Ground Floor and the First Floor. So, I have to model the shear walls in Ground Floor and First Floor. I am getting low modal mass...
Dear everyone,
I am analysing RC building with 26 stories in ETABS. From its modal analysis, the time period of fundamental mode of the building is more than 5 seconds. Is it OK to get such a high time period?
Dear everyone,
I am modelling a building in ETABS. I have modelled shear walls, columns and beams for lateral load resistance. I am getting huge bending moments in beams with shear walls of length half the length of beam. Some beams are failing in flexure after design and check in ETABS.
By...
I am modelling a building with double basement. I have confusion in assigning the soil pressure in wall. I have calculated the coefficients C and D. My question is the use of restrictions - Use all values; Zero negative values; Zero positive values. Among these three options, which option should...
Dear Everyone,
I am new to eng-tips forum. This is my first question in this forum.
I am designing a building with columns and shear walls. Without shear walls, I am getting huge rebar percentage in columns. When I introduce shear walls, I am getting minimum reinforcement in columns and shear...
