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A step-by-step procedure for modeling and analysis of frame structure using ETA

A step-by-step procedure for modeling and analysis of frame structure using ETABS is explained through a simple example. Subsequently an example of seismic analysis of regular frame structure and irregular frame structure are solved manually and through ETABS. Example A plan of five storey reinforced concrete (RC) frame structure is considered for modeling and analysis using ETABS. Beam sizes 300×450 mm Storey Height 3.2 m. Columns sizes 300×450 mm Live Load 3 kN/m2 Slab thickness 120 mm Floor Finish Load 1 kN/m2 Concrete grade M25 Steel Fe415 Zone: V Importance Factor 1 Medium soil, Response Reduction Factor: 5 Step 1: Modeling using ETABS 1) Open the ETABS Program 2) Check the units of the model in the drop-down box in the lower right-hand corner of the ETABS window, click the drop-down box to set units to kip-ft 3) Click the File menu > New model command Note: we select No because this first model you will built 4) The next form of Building Plan Grid System and Story Data Definition will be displayed after you select NO button. Set the grid line and spacing between two grid lines. Set the story height data using Edit Story Data command 5) Define the design code using Options > Preferences > Concrete Frame Design Command This will Display the Concrete Frame Design Preference form as shown in the figure. 6) Click the Define menu > Material Properties Add New Material or Modify/Show Material used to define material properties Default concrete material (“CONC3500”) has been used for this example. Strength of concrete (Fc’) = 3500 psi Yield strength of main reinforcement (Fy) = 60000 psi Yield strength of shear reinforcement (Fys) = 60000 psi Young Modulus of concrete ( Ec) = 3600 ksi 7) Define section columns and beams using Define > Frame section Define beam sizes and click Reinforcement command to provided concrete cover Define Column: Add Rectangular => section Name =Col12x18 Material name = Con3500 Dimensions : Depth (3) =12 in. Width (2) = 18 in Click reinforcement Select => Column Select => Rectangular Ties  Rectangular Cover to rebar centre= 0.056 (40+8+16/2=56mm) Bar size =16 d Corner bar =16 d  Reinforcement to be designed  Ok Ok. Define column sizes and click Reinforcement command to provided concrete cover and used two options Reinforcement checked or designed 8) Define wall/slab/deck 9) Generate the model Draw beam using Create Line Command and draw column using Create Column command uploads/Ingenierie_Lourd/ example-zone-v-importance-factor-1-medium-soil-response-reduction-factor-5.pdf