Projefct 1_Comparative study of different storey buildings for Seismic forces

Project-1

Comparison 1:

Aim: To compare the effect of stiffness on the natural period of buildings E&F and G&H using ETABS

Building E:

• Open New model
• Set the building E story as 10 and the number of bays in the X direction as 4 and in Y direction as 3.
• Defining the section property of column as 400x400mm for upper 5 stories and bottom 5 stories as 600x600mm.
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Here we got Building E Modal participating ratios.

Building F:

• Open New model
• Set the building F story as 10 and the number of bays in the X direction as 4 and in Y direction as 3.
• Defining the section property of column as 600x600mm.
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Here we got Building F Modal participating ratios.

Building G:

• Open New model
• Set the building G story as 25 and the number of bays in the X direction as 4 and in Y direction as 3.
• Defining the section property of column as 400x400mm for upper 5 stories and bottom 10 stories as 800x800mm and middle stories as 600x600mm
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Here we got Building G Modal participating ratios.

Building H:

• Open New model
• Set the building H story as 25 and the number of bays in the X direction as 4 and in Y direction as 3.
• Defining the section property of column as 800x800mm
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Here we got Building H Modal participating ratios.

Conclusion:

• The time period of E=1.208
• The time period of F=1.257
• The time period of G=2.996
• The time period of H=3.372

As the height of the building and the sectional dimensions of the column and building change, the time period also varies.

Comparison 2:

Aim: To compare the effect of mass on the natural period of buildings H,J and K using ETABS

Building H:

• Open New model
• Set the building H story as 25 and the number of bays in the X direction as 4 and in the Y direction as 3.
• Defining the section property of column as 800x800mm
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Here we got Building H Modal participating ratios.

Building J:

• Open New model
• Set the building H story as 25 and the number of bays in the X direction as 4 and in Y direction as 3.
• Defining the section property of column as 800x800mm
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3.3kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Here we got Building J Modal participating ratios.

Building k:

• Open New model
• Set the building K story as 25 and the number of bays in the X direction as 4 and in Y direction as 3.
• Defining the section property of column as 800x800mm
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3.6kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Here we got Building K Modal participating ratios.

Conclusion:

• The time period of H=3.372
• The time period of J=4.861
• The time period of K=5.588

As the mass of the building is gradually increased that is the loads is incremented 10% and 20% so the natural period also varies.

Comparison 3:

Aim: To compare the effect of height on the natural period of buildings A, B, F, and H using ETABS

Building A:

• Open New model
• Set building A story as 2 and the number of bays in the X direction as 4 and in Y direction as 3.
• Defining the section property of column as 400x400mm
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Building B:

• Open New model
• Set the building B story as 5 and the number of bays in the X direction as 4 and in Y direction as 3.
• Defining the section property of column as 400x400mm
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Building F:

• Open New model
• Set the building F story as 10 and the number of bays in the X direction as 4 and in Y direction as 3.
• Defining the section property of column as 600x600mm.
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Here we got Building F Modal participating ratios.

Building H:

• Open New model
• Set the building H story as 25 and the number of bays in the X direction as 4 and in the Y direction as 3.
• Defining the section property of column as 800x800mm
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Here we got Building H Modal participating ratios.

Conclusion:

• The time period of A=0.344
• The time period of B=0.502
• The time period of F=1.257
• The time period of H=3.372

Comparison 4 :

Aim: To compare the effect of height on the natural period of buildings B, C, and D using ETABS

Building B:

• Open New model
• Set the building B story as 5 and the number of bays in the X direction as 4 and in Y direction as 3.
• Defining the section property of column as 400x400mm
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Building C:

• Open New model
• Set the building C story as 5 and the number of bays in the X direction as 4 and in Y direction as 3.
• Defining the section property of column as550x300mm
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Building D:

• Open New model
• Set the building C story as 5 and the number of bays in the X direction as 4 and in Y direction as 3.
• Defining the section property of column as300x550mm
• Now define the section properties of beam300X400mm and slab 150mm
• Assign the live load as 3kN/m2.
• Assign Dead Load on beams from infill wall as 10 kN/m
• Check the project
• Run analysis
• Now go to the Display tab and select the show table option
• Check the model participation ratio
• Done

Conclusion:

• The time period of B=0.502
• The time period of C=0.773
• The time period of D=0.790