A short column with bending in X-Axis direction will be design using PiscesaCol 1.05 and PCACOL V3.00, then the result of each application will be compared to ensure the result from PiscesaCol 1.05 can be used safely in design. Rectangular Column with width 500 mm and height 500 mm, the load applied in columns consist of uniaxial bending in X Axis about 260 kNm and Axial Load consist of 450 kN with Concrete Compressive Strength (f’c) 40 MPa and Reinforcement Steel Yield Strength 400 MPa.
Each step in using PiscesaCol 1.05 will be explained step by step below :
Step 1
Open PiscesaCol 1.05 programs from start menu button. Click Start >> Program Files >> PiscesaCol 1.05 >> PiscesaCol 1.05.
Step 2
After opening the program, the main window of PiscesaCol 1.05 program will be shown and can be seen in the picture below, every part of the main window has it own function which will be discussed later. Main Menu show the sub menu of File, Input, Solve, Design and View. Column Section and Reinforcement Over View will show the shape and reinforcement position of current defined column. Information of Material, Section and Reinforcement Properties will show the information that had inputed before. Interaction Diagram and Loading Position Graphics will show the current capacity according to the code selected. Information Sheet of Analysis, Loading and Design Result will show the point of current analysis by value.
Step 3
Ok… now we’ll start with define the general information about the current column. Click Input >> General Information. The picture shown below is the General Information Window of column which include the Codes were used and question about Slenderness Effect to be included in analysis. For beginning lets type “Test” in Project Text Box, “K500x500” in Column Text Box and “Your Name” in Engineer Text Box. Second let’s pick up SNI 2847-2002 which is similiar with ACI 318-1999 except for the reduction factor or ACI 318-2002 (Unified Design Theory). Neglect slenderness effect for this time. This two method (Both of Limit State Method and Unified Design Provision) will be explained briefly in other topics for now on let’s keep the SNI 2847-2002 which is familiar in Indonesia. After all field was filled then proceed with click OK button.
Step 4
Define Material Properties of column, click Input >> Material Properties. The Picture shown below is Material Properties Window of column which includes the major Characteristic of Compressive Strength of Concrete (f’c) which the value is 40 MPa and Steel Reinforcement Yield Strength (fy) which value is 400 MPa. Modulus Elasticity of Concrete will be calculated automatically with normal Modulus Elasticity of Concrete formula where Ec = 4700*(f’c)^0.5. Maximum Stress f’c will also be calculated automatically with strength reduction of axial concrete compressive strength 0.85. Beta1 was calculated using the formula B1=0.85-((f’c-30)/28), B1>=0.65. Modulus Elasticity of Steel Reinforcement Es = 200000 MPa and Ultimate Strain at Yield of Steel Reinforcement will be calculated automatically with formula es=fy/Es. After all field was filled proceed with OK button.
Step 5
Define Section Properties of column, Click Input >> Section >> Rectangular. The Picture shown below is Rectangular Section Window of column where the Width of column (along X) and Depth of column (along Y) will be filled according to the column width which value is 500 mm and column depth which value is 500 mm. After all field was filled proceed with OK button.
Step 6
Define reinforcement properties of column, we will used four side equal at this time, Click Input >> Reinforcement >> Four Side Equal. The Picture shown below is Four Side Equal Reinforcement Window which includes number of bars (n) = 12 pieces, Diameters of Bars (d) = 25 mm, Decking (deck) = 50 mm and Hoops (ds) = 10 mm. After all field was filled proceed with OK button.
Step 7
Define Ultimate Factored Load, Click Input >> Load >> Factored. The Picture shown below is Factored Load Windows which at this case the axial load value is 450 kN and X-Moment value is 260 kNm. After all the field is filled click insert button to make sure it was on the table below, after it’s in the table and there is no other load will include in the analysis then proceed with OK button.
Step 8
Running the analysis, click Solve >> Execute. The Picture shown below is Interaction Diagram of column with the loading data was viewed as cross mark. From the Graphics of Interaction diagram can be seen that the load was inside the Interaction Diagram Curve which means the strength of column is satisfied enough to encounter the applied load. Spreadsheet on the right shows the points of interaction diagram where the Column “A” represent the Axial Capacity (SNI 2847-2002) and the Column “B” represent the Moment Capacity (SNI 2847-2002).
Step 9
Now we will compare our codes (SNI 2847-2002) with ACI 318-2002 where in analyzing the interaction diagram it’s almost the same with ACI 318-2005/2008. Click Input > General Information and check the ACI 318-2002, proceed with OK button and then Click Solve > Execute to proceed with analysis. The result was shown in the Picture Below. It is seen on the Picture another interaction diagram of ACI 318-2002 with reduction factor of Compression Controlled 0.65 and for Tension Controlled 0.9.
Step 10
This conclude this tutorial. If you have any question please feel free to use the forum or email me… ^^, Any adviced and critics will be helpfull for the implementation of ITS Column Analysis 2013. Thanks…
The Journey 