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CONCRETE FRAME EXAMPLE

A concrete frame will be analized with RCsolver software program according to Eurocode 8 specifications. The frame in this example will consist of two rectangular columns and the connecting T-Section beam. RCsolver will perform capacity design of the two joints and calculate the required longitudinal and shear reinforcement for all members. The following data is available:

 

a. Left and right column section properties:

Rectangular section, b=0.5 m, h=0.6 m, C = 50 mm, Concrete C25/30, Steel B500C, minimum longitudinal bar diameter D14, minimum shear reinforcement bar diameter D10, number of stirrup legs = 4.

 

b. Left column properties:

H = 3 m, M,topz = 100 KNm, M,topy = 80 KNm, M,botz = -90 KNm, M,boty = -90 KNm, Vz = -70 KN, Vy = 80 KN, Ntop = 400 KN, Nbot = 450 KN (for axial → + for compression).

 

c. Right column properties:

H = 3 m, M,topz = -130 KNm, M,topy = -120 KNm, M,botz = 110 KNm, M,boty = 100 KNm, Vz = 60 KN, Vy = 70 KN, Ntop = 450 KN, Nbot = 500 KN (for axial → + for compression).

 

d. Beam section properties:

Beff = 1 m, h = 0.65 m, Bw = 0.25 m, tf = 0.2 m, C = 50 mm, Concrete C25/30, Steel B500C, proposed longitudinal bar diameter D18, proposed shear reinforcement diameter D10.

 

e. Beam properties:

L = 3 m, Mleft = -110 KNm, Mright = -120 KNm, Mspan = 70 KNm, Vleft(G+0.3Q) = -90 KN, Vright(G+0.3Q) = 90 KN, Vleft(1.35G+1.5Q) = 100 KN, Vright(1.35G+1.5Q) = -100 KN.

 

f. Eurocode 8 properties:

Behavior factor q = 3.9, Fundamental periods of vibration in the horizontal and in the perpendicular direction of interest: 1 sec.

 

Objective: Design all concrete frame members, calculating the required longitudinal and shear reinforcement.

 


Concrete Frame Properties Form in RCsolver

Figure 1: RCsolver form for the definition of the concrete frame members

 

Concrete beam section properties in RCsolver

Figure 2: Beam section properties

 

Concrete column section properties in RCsolver

Figure 3: Column section properties

 

Concrete beam loading in RCsolver

Figure 4: Beam loading

 

Concrete column loading in RCsolver

Figure 5: Left column loading

 

Concrete column loading in RCsolver

Figure 6: Right column loading

 

Concrete Frame 3D Model

Figure 7: 3D model in RCsolver

 

Concrete beam results in RCsolver

Figure 8: Beam results in RCsolver

 

Concrete column results in RCsolver

Figure 9: Left column results in RCsolver

 

Concrete column results in RCsolver

Figure 10: Left column results in RCsolver

 

Calculations


Concrete Frame Calculations in RCsolver


Concrete Frame Calculations in RCsolver

 

Concrete Frame Calculations in RCsolver

 

Concrete Frame Calculations in RCsolver

Concrete Frame Calculations in RCsolver

Concrete Frame Calculations in RCsolver

Concrete Frame Calculations in RCsolver

Concrete Frame Calculations in RCsolver

 

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RCsolver contains all calculation procedure according to Eurocodes 2 and 8, feel free to download RCsolver and view all the equations!

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