Reinforced concrete frame of one-storey industrial building

Contents

Contents

1. Calculation of transverse frame with variable stiffness columns with hinge 

supporting the crossbar                                                          .

 Define the main overall dimensions of the transverse frame.               

Collecting loads on the                                       frame.

Constant loads.                                                 

Snow loads.                                                   5  

Crane loads.                                                   

Wind loads.                                                   

Static frame calculation.                                                

Constructs a column.                       

2.1 Calculation of column top.                                           

2.2. Calculates the bottom of the column.                                           

3. Calculates a truss with parallel belts                                    .

3.1. Source data.                                                      

3.2. Constant loads.                                                   

3.3. Defines forces in truss elements.                                   

3.4. Calculates cross sections of truss elements                                         .

3.4.1. Upper compressed belt                                                 .

3.4.2. Lower stretched belt.                                              

3.4.2. Calculation of stretched brace P2.                                          

4. Literature.                                                             

1. Static calculation of transverse frame with variable stiffness columns with hinged support of crossbar

Source data.

Column spacing: 6 * 12 m.

Crane lifting capacity Q = 25 t.

Height h = 9 m.

Construction area Ulyanovsk 4 - by snow load,

1 - by wind load.

5. Building by degree of responsibility belongs to class 2

3.4.3 Calculation of stretched brace P2.

Tensile force in brace:

- normative value of force from constant and full snow loads Nn = 215.18 kN

- standard value of force from constant and long-term loads Nnl = 177.61 kN

- design value of force from constant and full snow loads N = 258.60 kN

The strained fittings of a raskos 5Ø9 of class K-7 with an area And = 2.55 cm2. Angle of rotation of axis Ө = 0.66 rad at α = 37.8 °. Tension is performed on stops, the method of tension is mechanical. Required section area of reinforcement on condition of section strength AS = 258600/( 1, 15· 1080000) = 2.08 cm2 < 2.55 cm2 Accepted area is sufficient. We accept the cross section of the brace 18 × 12.

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